unlike the traditional 532nm crystal frequency-doubled green light, the 515nm green cross line laser module is a direct-emission pure green semiconductor laser. Without the need of a crystal resonant structure and features a built-in high-precision orthogonal optical lens group, this 515nm wavelength green laser diode made cross line laser module only emits highly bright and visible forest green light from an import laser diode, which is the most visually sensitive band for the human eye. This 515nm green cross laser alignment gets high visual sensitivity to the human eyes. Cross line projection remains clear even under interference from welding fumes and arc light, and are not obscured by the strong light of the welding arc. Welders do not need to painstakingly locate the lines, reducing visual misjudgment.
Cooperated with an import 515nm green laser diode within 50mW to 200mW output power, based on its different output power range, this green cross line laser module is designed with different size tube diameter of 16mm, 18.9mm and 26mm. As a result, owing to its sufficient space leaving for tube heat dissipation, only if it make constant cross line projection within 24 hours per day, it achieves increasing laser beam stability, ultra long time lasted green light and green vertical and horizontal lines generation stably. Highly reflective welding substrates such as aluminum, copper, and stainless steel have better absorption of 515nm light waves. The projected crosshairs from a 515nm green cross laser alignment do not diffuse, do not cause glare or ghosting, and the marking edges are sharp, solving the industry pain point of unclear positioning on highly reflective metals.
On consideration of its long term lasted cross line projection, 515nm green cross line laser module applies a qualified glass coated lens with 10, 15 and 110 degree fan angles, and adjustable focus optic lens in front of beam aperture. Owing to its strict laser beam stability and aging preventing tests up to 24 hours before flowing into laser market, even under high-temperature environments in welding workshops, the crosshair orthogonality of 515nm green cross laser alignment does not shift and the line width does not diverge during long-term operation. Frequent shutdowns for recalibration are unnecessary, making it suitable for 24-hour continuous welding operations. The unique use of built-in APC, ACC driving circuit board has just made perfect protection of itself from overheating, over current impact and other harsh working environments as well.
This durable structure made 515nm green cross line laser module is applicable for various metal welding conditions, including TIG welding, CO2 shielded welding, laser welding, spot welding, and weld jointing, serving as a pre-welding reference positioning and auxiliary marking for weld seam alignment. The module is compact and flexible in installation, thus it can be handheld to assist manual welding positioning or directly mounted on welding robots and welding fixtures as a machine vision-assisted positioning reference, adapting to automated production line upgrades. When 515nm green alignment laser makes correct selections of both output power and optic lens fan angle, it can significantly improve the alignment efficiency and forming quality of manual welding, and also meet the standardized and precise positioning requirements of automated welding. It is an ideal auxiliary positioning light source for metal welding processes.
Category: cross line laser module
High Positioning Accuracy 532nm Green Cross Laser Alignment in Steel Plate Crosshair Marking
Unless the use of any prior cross line projection with manual or mechanical cross line aligning tools, it would be always a much better job for engineers and factory workers to apply a highly bright light emitted tool of 532nm green cross laser alignment. It applies the middle wavelength of 532nm green DPSS laser system and a qualified glass coated lens inside a durable metal housing tube. It always allows quite easy installation and integration into steel plating marking machine or device, not limited by long distance, high height and other harsh working environments, this cross line laser module assures high brightness green light emission, ultra clear, fine and precise cross line generation for multiple steel plate crosshair marking works conveniently.
After quite easy connects with an AC/DC adapter, 532nm green cross laser alignment can easily project at least 5 to 8 times brighter green laser light than that of red light of the same output power. For the most important of all, owing to its low laser beam divergence and special TEM00 laser beam mode, either it is pointing at close or long distance, the generated green cross line still maintains ultra high brightness and high fineness. In addition, according to its special use of a metal heat sink cooling system design inside a different size metal housing tube, this green cross line laser module gets sufficient space leaving for tube heat dissipation, achieves increasing laser beam stability and ultra long time lasted green vertical and horizontal lines generation within 24 hours per day. It is projecting highly bright green light on highly reflective steel plates, the crosshairs are not obscured by the metallic luster. In addition, green cross line also remains visible even under strong workshop lighting and welding arc light.
Cooperated with a qualified glass coated lens and adjustable focus optic lens in front of laser beam aperture, after its immediate green laser light concentration, 532nm green cross laser alignment gets efficient conversion of increasing accuracy and brightness two perpendicular green lines for both of greater distance and higher lighting occasions as well. It keeps work with high positioning accuracy and strong stability, thus green cross lines are available with fine, straight lines without drift. It also maintains stable output power and clear alignment with 8-hour fluctuation <±3%, consistent baseline over long-term operation. When green cross line laser module passes through up to 24 hours aging preventing and beam stability tests, after its proper operation by professionals or skill users, it enables workers to quickly align, reducing manual marking errors and scrap rates.
Based on the adoption of ultra compact size and durable structure design for all output power range, 532nm green cross laser alignment enables quick response, good direction and highly precise green vertical and horizontal lines generation in distance. It also provides clear visibility across distances and at high workstations, allowing for single-person alignment. It is mainly used as a high-precision, non-contact visual positioning reference.
Applications in steel plate crosshair marking:
Crosshair Centerline Positioning: Provides a precise center reference for drilling, punching, and riveting steel plates.
Cutting/Shearing Alignment: Projects crosshairs to determine the cutting start point and angle on flame/plasma cutting and shearing machines.
Welding and Splicing Positioning: 532nm green alignment laser ensures that the edges and center of two steel plates are aligned when they are joined.
Bending/Stamping Reference: Serves as a crosshair reference line for bending angles and stamping positions of complex sheet metal parts.
Industrial Grade Stability 532nm Green Cross Laser Alignment for Multiple Filed Use
What makes a good job to make ultra clear and precise cross line projection? It should be processing in multiple operating environments, including long distance, high height and other hard reaching places etc, it is making the best job for engineers and professionals to apply a highly bright light emitted tool of a 532nm green cross laser alignment. It applies the advanced 532nm green DPSS laser tech and a qualified optic lens inside a durable metal housing tube. It projects extremely bright and visible green light from a middle wavelength of 532nm green DPSS laser system, the brightness is at least 8 to 10 times that of red light at the same output power. Only if green cross line laser module gets constant power source supply and proper installation onto desired machine or device, it achieves highly precise, clear and bright two perpendicular green lines generation under multiple occasions, including sunlight, strong light, dust and smoke etc.
The genuine use of a 532nm green cross laser alignment adopts an AC/DC adapter, not spending extra time on prior battery power source change, it is able to work with constant green light emission. It applies a 532nm green DPSS laser within 5mW to 100mW output power, equipped with different type of cooling system, either inner or outside the tube, it gets sufficient space leaving for tube heat dissipation, and achieves increasing stability green vertical and horizontal lines generation as long as 24 hours per day. Being manufactured with ultra small size tube design, this green cross line laser module always enables quite easy installation, easy reaching and noncontact cross line generation at long distances of 10 to 30 meters.
Cooperated with a qualified glass coated lens and adjustable focus optic lens design, 532nm green cross laser alignment provides dual horizontal and vertical references, achieving 90° right-angle positioning in a single operation, eliminates repeated adjustments to individual lines, significantly improving efficiency. After its immediate green light source concentration from beam aperture, it is converted into an increasing accuracy and brightness green cross line source at greater distance and higher lighting occasions, with no ghosting and sharp edges. This green cross line laser module maintains stable output power and line quality even after 24 hours of continuous operation, without affect by overheating and over current impact as well. After its correct use of output power and operating voltage DC power supply, it is working well with good adaptability of highly reflective materials of copper, aluminum and stainless steel etc.
Applications in multiple fields:
Industrial Manufacturing and Machining. Highly precise green cross laser alignment is applied for equipment Installation and calibration, working well for horizontal/vertical/coaxial alignment of machine tools, production lines, and robots. Green cross line is helpful for cutting and welding positioning, path marking for cutting steel plates, stone, wood, and pipes.
Textile/Printing/Packaging: Crosshair alignment for fabric cutting, screen printing, and labeling.
Electronic Assembly: Precise cross line positioning of minute dimensions for PCBs and semiconductor components.
2. Building and Decoration Engineering
• Decoration Reference: Horizontal/vertical green alignment laser lines for wall drilling, tile laying, ceiling installation, and door and window installation.
• Construction Layout: Axis and vertical alignment calibration for civil engineering, steel structures, and bridges.
• Indoor and Outdoor Measurement: Clearly visible even under strong light and at long distances.
Precise Work of 515nm Green Cross Line Laser Module in Woodworking Machinery
What makes a good job to make clear and precise cross line alignment in woodworking machinery? Either it is pointing at close or long distance not simply relying on any manual or mechanical cross line alignment work, it would be a good solution for engineers and factory workers to apply a high density light emitted tool of a 515nm green cross line laser module. 515nm wavelength is near the middle wavelength of 532nm among all visible optical spectrum, thus green laser light is highly visible in woodworking environments. The human eye is most sensitive to light, making it ideal for woodwork. When green cross laser alignment gets correct output power and optic lens fan angle, even in dusty, sawdust-filled, and complex lit woodworking workshops, green laser light still remains clear and bright in daylight, strong light, and on dark colored boards etc.
Basically 515nm green cross line laser module applies an import 515nm green laser diode within 50mW to 200mW, equipped with different type of thermal emitting, it enables superior nice heat dissipation, ultra long time lasted green light and green cross line projection in continuous use. For instance, when it selects lower power of 50mW to 100mW, a simple metal heat sink cooling system inside a metal housing tube is efficient enough to achieve good laser beam stability. In addition, a separate metal heat sink cooling system for higher power green cross laser alignment achieves longer time lasted cross line alignment, while still maintaining stable, clear and reliable two perpendicular green lines generation as long as 24 hours per day. Usually it gets no effect by moisture, dust, and other mechanical moving or calibration as well.
Cooperated with a qualified glass coated lens with 10, 15 and 110 degree fan angles and adjustable focus optic lens design in front of laser beam aperture, this 515nm green cross line laser module emits highly straight, fine and bright two perpendicular green lines within 0.5 meter to 6 meters lengths in distance. Together with its freely adjusted cross line thickness and low beam divergence, workers can align the material immediately upon loading, significantly reducing errors. Usually 515nm green cross laser alignment emits direct green light from an import 515nm green laser diode, without a pumped crystal, thus it is more suitable for harsh woodworking environments than 532nm green DPSS laser light.
Unaffected by vibration, dust and temperature changes, 515nm green cross line laser module can work continuously for 24 hours, has a long lifespan, and requires no maintenance. Whenever it makes correct use of output power and optic lens fan angle, without chalk lines, measurements or repeated calibration, only if it gets constant power source supply, it can quickly align the material, reducing reliance on experienced workers. Usually this alignment laser can be directly installed on saw tables, drill presses, and frames, providing a high precision and high stability rapid positioning reference in woodworking machinery, replacing ink lines and manual marking, making sawing, drilling, and edge banding more accurate, faster, and more material-efficient.
Applications in woodworking machinery fields:
Sliding table saw, panel saw and reciprocating saw. 515nm green cross line laser module replaces traditional ink lines and marking, eliminating the need for manual line marking, providing plating cutting positioning and alignment reference. It can prevent sawing sawing deviation, edge chipping, and increased waste.
Edge Banding Machine and Multi-Spindle Drilling Machine. It maintains consistency when processing multiple boards continuously, providing clear and bright green cross line source for plate feeding alignment and edge alignment, and drilling position crosshair center point positioning.
Woodworking Milling Machine, Router, Sanding Machine. It makes quick workpiece alignment and backrest positioning, applicable for solid wood cutting, panel splicing machine, and finger jointing machine.
General Applications of 445nm Blue Crosshair Laser Module In Scientific Experiments
In a large variety of scientific experiment works, not simply relying on any prior cross line drawing or printing work, it would be always making an efficient job to apply a high energy density beam emitted tool of a 445nm blue crosshair laser module. It applies an import 445nm blue laser diode and a qualified optic lens with different fan angles inside a highly durable metal housing tube. It is mainly used in scientific experiments for optical alignment, spatial positioning, instrument calibration, and calibration of biological/materials/physics experiments. Based on the special use of thermal emitting system design and constant power source supply, after its proper installation or integration with experimental machine or device, this blue cross laser alignment enables stable wavelength, high precision, intuitive and easy to use, and easy integration, providing an efficient reference light source for precision measurement and optical experiments in the laboratory.
Usually 445nm blue crosshair laser module applies an AC/DC adapter as its electric power source, not spending extra time on battery change, it can make constant blue light emission from an inner laser diode directly. 445nm blue light belongs to the narrow bandgap of visible light, facilitating filtering, detection, and control, making it suitable for precision optical experiments. Being made with an import 445nm blue laser diode within 50mW to 500mW, cooperated with a metal heat sink cooling system and APC, ACC driving circuit board inside a different dimension metal housing tube, this direct diode emission made blue cross laser alignment always achieves good heat dissipation, high laser beam stability, long period blue vertical and horizontal lines generation as long as 10 hours per day.
Owing to the adoption of a qualified glass coated lens with 10, 15 and 110 degree fan angles, cooperated with adjustable focus optic lens in front of laser beam aperture, this 445nm blue crosshair laser module gets immediately focused blue laser light emission, and converts into an increasing accuracy and brightness blue vertical and horizontal lines at a long operating distance and high lighting environments as well. It provides both X and Y bidirectional references, enabling two-dimensional positioning in a single alignment, simplifying experimental setups. After its correct use of output power and optic lens fan angle, and proper integration with optical supports, displacement stages, microscopes, and experimental chambers, this blue alignment laser meets the high precision and repeatability requirements of scientific research, minimizing experimental errors. Blue light is clear and non-glaring in darkroom/laboratory environments, facilitating manual alignment and observation.
Applications in scientific experiment fields:
Optical Experiment Reference and Alignment: 445nm blue cross line laser module is used as a spatial positioning reference for coaxial, collinear, and coplanar calibration of optical platforms, optical path systems, lenses/mirrors/gratings.
Physical Experiment Positioning and Measurement: Position marking in interference, diffraction, and imaging experiments; auxiliary marking lines for displacement, angle, and deformation measurements.
Biomedical Experiment Positioning: Blue cross laser alignment is positioning the center of view in microscopes and imaging systems; precise alignment of cell manipulation, microfluidic chips, and biological samples; spot positioning in photodynamic and photostimulation experiments; irradiation area calibration in photocatalysis, photodegradation, and photopolymerization reactions in materials and chemistry experiments; surface modification of materials; and spot position fixation.
Precision Instrument and Sensor Calibration: Correction of the coordinate origin and crosshair reference for two-dimensional measuring instruments, projectors, visual inspection systems, and displacement sensors.
Micro-nano fabrication and experimental stages assist in rapid centering and alignment of photolithography, microfabrication, and probe stages, improving experimental repeatability and efficiency.
650nm Red Cross Line Laser Module Applied For Medical Fields
When 650nm red cross line laser module is projecting highly visible and straight two perpendicular red lines with accurate 90 degrees, owing to its ultra compact size and durable structure design, it has got wide applications for a lot of laser medical treatment fields. Being made with qualified optic lens and light emitting laser diode inside, combined with basic cooling system inside its different dimension tube, this cross laser alignment always allows easy installation onto those of medical equipment and device, and helping professionals to make clear and easy location as expected.
After the use of an AC/DC adapter, not spending extra time on battery change, this 650nm red cross line laser module always makes immediate and good direction red cross line projection from beam aperture. In neurosurgery, orthopedics and other surgeries, this red laser device can accurately project the red cross line source to the patient’s surgical site, provide doctors with accurate anatomical position references, and assist doctors in performing surgical operations accurately, such as determining the location of surgical incisions and the placement of implants, which helps to improve the accuracy and safety of surgery and reduce surgical trauma and complications.
When 650nm red cross line laser module is used for radiotherapy, which can help doctors and technicians accurately determine the location of the tumor and the treatment area. Owing to its highly straight and visible red vertical and horizontal lines, it can reach patient’s body and combining them with the results of imaging examinations, which ensures that the radiation of radiotherapy is accurately irradiated to the tumor site while minimizing damage to surrounding normal tissues.
Being made with ultra compact size tube design, available with 16mm and 26mm diameter tube design for wide range output power of 5mW to 100mW, this 650nm red cross line laser module is also used for some of ophthalmic examination equipment and treatment instruments. It can help doctors accurately locate specific parts of the eyeball, such as the retina, cornea, etc., to facilitate detailed examinations and precise treatments, such as target positioning in laser eye surgery.
When it is used for human body outside treat works, this 650nm red cross line laser module is also an important part for rehabilitation therapy. It can be used to assist patients in limb movement training and evaluation. By projecting highly visible red cross line source, visual reference is provided to patients, helping them to accurately control the movement direction and position of their limbs, thus improving the effect of rehabilitation training. Whatever kind of working occasions red alignment laser is used for real cross line measurement, it is a key point to pay high attention to thermal energy hurt to eyes. After proper wearing of laser safety goggles and avoiding eye exposure to beam aperture, it brings users easy and secured measurement and location effectively.
How Can Glass Lens 650nm Red Cross Line Laser Module Work Continuously?
Have you ever got a quite easy and precise cross line projection? Either it is used for close or long distance, not able to rely on any manual labor force input, it makes a better job for users to operate a highly intense beam emitting tool of a 650nm red cross line laser module. Owing to its advanced use of an import laser diode and qualified optic lens inside different dimension metal housing tube, whatever kind of working surface it is pointing, this accessory part just allows quite easy carrying, good thermal emitting and ultra stable red vertical and horizontal lines generation at long extending distance conveniently.
Owing to the use of an AC/DC adapter, this 650nm red cross line laser module just makes constant red laser beam emission at long extending distance. It applies an import 650nm red laser diode within 5mWto 100mW. Owing to its basic use of cooling system inside a high duration anodized aluminum alloy housing tube, it gets superior nice thermal emitting and thermal conductivity, and ultra stable red cross line projection within long lasting work time of more than 8 to 10 hours per day. Together with other machine or device, not limited by manual labor force input, this accessory part of a cross laser alignment tool always brings users quite satisfied measurement for both of industrial and high tech fields.
Cooperating with a qualified glass coated lens with 10, 15 and 110 degree fan angles, in order to assure its clear and no decay light cross line projection, this 650nm red cross line laser module always passes through quite strict laser beam stability and aging preventing test before its available on laser market. It gets different cross line lengths within 0.5 meter to 6 meters length in use. According to correct selection of output power and optic lens fan angle, and proper installation, this accessory part of a red cross laser alignment makes good job for laser alignment for screen printing system, heat transfer machine, laser medical therapy, military targeting and lab experiment etc.
According to special use of a APC, ACC driving circuit board, not limited by long distance or high height, a proper output power and optic lens fan angle made 650nm red cross line laser module makes sure of constant red laser beam and red cross line projection. It gets no effect by tube burning out or damage, but achieves long serving lifetime of more than 8,000 hours. When red alignment laser gets proper use by professionals and engineers, after proper wearing of laser safety goggles, it still makes easy, free, and no mistake measurement for all application fields.
Easy Used DC Power 445nm Blue Crosshair Laser Module
When cross line projection work is processing onto different working surfaces, not any longer limited by long distance, high height or other hard reaching places etc, none of manual labor force input can be comparable with a highly intense beam emitting tool of a 445nm blue crosshair laser module. It is an industrial stabilized cross line alignment tool, which gets advanced use of an import 445nm blue laser diode and a qualified optic lens inside a high duration metal housing tube. In practical precise cross line measuring work fields, after its proper installation and correct use of output power, this cross laser alignment tool brings users the best cross line experience for all precise machinery processing works effectively.
According to the easy use of an AC/DC adapter, not spending extra time time on alkaline battery power source change, the usual use of a 445nm blue crosshair laser module is always making continuous blue cross line projection from laser beam aperture. It is applying an import 445nm blue laser diode within 50mW to 100mW as its beam emitting source. Configured with a metal heat sink cooling system inside a durable anodized aluminum alloy housing tube, this cross laser alignment is not only getting good thermal emitting and thermal conductivity, but also achieving ultra stable and reliable blue two perpendicular lines as long as 25 meters far away.
Owing to the advanced use of a qualified glass coated lens with wide fan angles of 10, 15 and 110 degree, once blue crosshair laser module is pointing onto different working surfaces, it is emitting different dimension blue vertical and horizontal lines at long extending distance. It projects highly straight and highly fine blue cross line source within 0.5 meter to 6 meters lengths in use. When users are getting basic learning of required cross line length, line fineness and work distance, after its correct selection of output power and optic lens fan angle, this cross laser alignment tool is bringing users quite satisfied cross line projection for laser show, laser displaying, communication, laser medical therapy and high tech work etc.
In a large variety of industrial and high tech precise cross line measuring work fields, this 445nm blue cross line laser module enables quite easy installation, and no track cross line projection onto any raw material surface. It allows long lasting and distance cross line projection for a lot of labs, institutes and colleges etc. For the most important of all, after its special use of adjustable focus optic lens, this blue alignment laser gets efficient conversion of ultra fine and bright blue cross line source at long extending distance. When users are taking active laser safety measures and wearing correct laser safety goggles, it still enables easy, no danger and no track use for all working occasions effectively.
Adjustable Focus Lens 635nm Red Cross Line Laser Module
Without any serious relying on any manual labor force input, when users are in need of ultra clear and fine cross line projection at longer work distance than formal hand reaching, it should not be working at all to get ideal cross line alignment as expected. Under continuous technical innovation of advanced 635nm red laser diode tech and a qualified optic lens with different fan angles, it is created into a practically used device of a 635nm red cross line laser module. Any time it makes proper installation with those of equipped machine or device, after correct use of output power and optic lens fan angles, this cross laser alignment tool is able to work with high brightness, high accuracy and quick response red cross line projection at long extending distances.
The genuine cross line alignment work with a 635nm red cross line laser module would be working for a quite long time, for the most important of all, it is a major part to maintain its stable and reliable cross line projection onto different working surfaces. It gets advanced use of an import 635nm red laser diode within 5mW to 100mW. Unlike the use of a simple red laser pointer only used for temporary positioning work, it gets even better thermal emitting in type of a metal heat sink cooling system. This cross laser alignment tool gets good thermal emitting and extremely stable red cross line source emission within constant work time of 10 hours per day.
Designed with a qualified glass coated lens with 10, 15 and 110 degree fan angles, whatever kind of working surface it is pointing, this 635nm red cross line laser module is working well with high linear quality and highly straight red cross line projection within 0.5 meter to 6 meters line lengths. In practical precise cross line measuring work fields, it is a necessity to get basic measurement of required cross line length, fineness and work distance, thus cross laser alignment tool gets correct use of output power and optic lens fan angle, and makes highly precise use for laser alignment for screen printing system, heat transfer machine, laser car wheel alignment and high tech work etc.
Cooperating with a laser alignment mounting bracket, within freely installed distance of 3 meters, this 635nm red cross line laser module enables quite easy installation, and quick reaching of red vertical and horizontal lines generation as long as 25 meters. The unique use of adjustable focus optic lens just enables immediate red laser light source emission, and highly efficient conversion of increasing brightness and fineness cross line alignment at long extending distance. When users are taking active laser safety measures and wearing correct laser safety goggles, it just brings users highly secured and fine use for all working occasions effectively.
Glass Coated Lens 532nm Green Cross Line Laser Module
In order to get ideal cross line projection at different work distances, even though it is not easy to reach with those of manual or mechanical cross line measuring works, it would be a much better solution for users to operate a high brightness device of a 532nm green cross line laser module. It enables highly visible and fine green cross line projection from a qualified glass coated lens with different fan angles. In practical precise cross line measuring work fields, on the basis of correct use of output power and optic lens fan angles, within quite long extending distance and high lighting working occasion etc, this cross laser alignment tool brings users good direction, quick response and high precision green vertical and horizontal lines generation at long extending distance constantly.
The usual cross line alignment work with a 532nm green cross line laser module should be working for a quite long time, for the most important of all, it should maintain its stable and reliable cross line projection in continuous use. It applies advanced 532nm green DPSS laser system within 5mW to 100mW, cooperating with a metal heat sink cooling system inside a durable anodized aluminum alloy housing tube, this green cross laser always gets superior nice thermal emitting and thermal conductivity, and obtains highly stable and reliable green vertical and horizontal lines generation as long as 8 to 10 hours per day.
According to the unique design of a qualified glass coated lens with 10, 15 and 110 degree, when green cross line laser module is pointing onto different working surfaces, it emits high linear quality and highly straight green vertical and horizontal lines generation with 0.5 meter to 6 meters line lengths in use. In addition, cooperating with a glass window in front of laser beam aperture, even though it is used under moisture or dust, this cross laser alignment tool gets gets perfect protection of itself and maintains its ultra clear and stable green cross line projection as long as 25 meters.
Being made with ultra compact and durable metal housing tube design, this 532nm green cross line laser module is working well as an accessory part, and making good direction and good direction cross line projection for laser alignment for screen printing system, heat transfer machine, laser medical therapy and high tech work etc. It enables freely adjusted cross line fineness and cross line projection, thus alignment laser brings users increasing accuracy and brightness cross line projection at longer distance and higher lighting occasion. Only if users are taking active laser safety measure and wearing correct laser safety glasses, it just brings users easy and secured use for all working occasions effectively.