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Laser Light Projector
A laser light projector is a device that projects changing laser beams on a screen to create a moving image for entertainment or professional use. It consists of a housing that contains lasers, mirrors, galvanometer scanners, and other optical components. It works by using three primary colour lasers to project an image directly on the screen. Compared to traditional projectors, which use white light that is then filtered into colours for more efficiency.
Types Of laser Light Projectors And Its Advantages
- Industrial Laser Projectors: It is used as a guide, like a stencil, in various manufacturing processes.
- Home Entertainment Laser Projectors: They have a wider colour gamut and longer life.
1. Industrial Laser Projectors
Industrial laser projectors have been on the market since about 2002/2003. Laser projectors are mainly used as optical guidance systems. They enable working without templates in many manufacturing processes by showing the workpiece how the material needs to be positioned or mounted. Like that, the employee is visually led by manual or semiautomatic productional processes.
Advantages
- Fast and stable projection with a high repetition rate (50 Hz)
- Optimized for 2D and 3D objects
- Highest accuracy of the projection
- A comprehensive optical angle (80° x 80°) allows more significant working sites
- Multi-projection system for vast and complex projections
Industries
- Blades for wind turbines
- Assembly support and workpiece control in 3D
- Laminated beam manufacturing
- Boat construction
- Caravan construction
- Glueing tables – CNC-BAZ – rip saws (stair construction)
- Nail truss
- Paper rolls
- Cable harness production
- Aerospace
- Leather nesting
- CNC machining centre
- Alignment of steel plates
- Inspection of metal surfaces
- Laser-supported placement of formwork for concrete steps
- Prefabricated concrete parts: Wall and ceiling elements
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Home Entertainment Laser Projectors
Home entertainment laser projectors have been on the market since about 2015. These devices can generate any wavelength of light, thus making wider colour gamuts possible without compromising brightness. This translates to deeper, richer colours that come closer than previous products to the vast range of colours human eyes can process. Other benefits include fast (up to instant) on/off and increased longevity: One manufacturer, for example, claims 30,000 hours for the lasers in one of their mainstream models. Compared to the roughly 3,000 hours most home projectors achieve with their UHP lamps. Costing around $250 to $400 per lamp, considerable savings can be completed over the projector’s lifetime.
Advantages of this method
- Material and time saving by an optimized workflow
- Immediate visual quality control
- Rise in productivity
- Laser projection with high representation precision and quality
- Typical components
Properties of laser light projector are
The significant properties of laser light projectors are as follows
- monochromatic (the same colour),
- coherence (all of the light waves are in phase both spatially and temporally),
- collimation (all rays are parallel to each other and do not diverge significantly even over long distances).
- Highly Intense or Brightness.
Conclusion
As seen previously, laser beams’ excellent efficiency and directionality are the sources of an extremely high hazard for the eye. Moreover, the wavelengths responsible for damage to the eye (cornea excepted) at the lowest intensities are in the domain of 400 to 1400 nm. Indeed, suppose one considers that the image of a collimated beam on the retina has a width of about 10 mm and that the diameter of a dilated pupil is about 7mm. In that case, a pulse carrying a few µJ or a continuous He-Ne laser beam of 1 mW is powerful enough to create permanent lesions on the retina. To find the spectral domain where the damage threshold on the eye is the highest and, therefore, the hazard the lowest, one has to find a compromise between the absorption spectra of the different parts of the eye.
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