Application of the hottest laser color amplificati

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Application of laser color amplification technology in digital color amplification system

lasers have been used in many imaging technologies, such as laser printers, medical imaging equipment, laser printing technology, etc., which use lasers and photosensitive materials for imaging. However, monochrome lasers are generally used in these fields. Only some professional color laser printers use trichromatic laser beams. Laser color expansion equipment uses trichromatic lasers and color photo paper

in this laser color expansion system, blue and green lasers are generated by gas or solid-state laser generators, red lasers are generated by laser diodes, RGB tricolor lasers are mixed into a single laser beam through the optical system, and after the reflection of a rotating prism surface, the laser beam evenly sweeps over the photo paper, and the movement of the photo paper changes the position of the scanning line, The result of synthesis is that the laser beam has scanned every point in the imaging area of the photo paper. The change of laser beam intensity determines the color intensity of scanned points. The intensity of the laser beam can be controlled by the converter (AOM), or the luminous intensity of the laser tube can be directly controlled

a complete laser exposure module cannot be obtained through commercial channels at present. Although lasers, converters, reflectors, prisms and other components can be bought in the market, it is not simple to combine them. The laser control system and optical system must be carefully designed, which requires complex technology and rich experience

laser color amplification technology has the following advantages:

1. Laser can focus accurately, which provides conditions for high-resolution imaging

2. The imaging range is relatively wide, which can reach 20 inches (about 500mm) at present

3. Only one laser light source is needed for each color of light, so the clear and strict product identification requirements can be easily calibrated. The color temperature calibration using multi-color light sources (such as bulbs in traditional color amplification equipment) and the calibration of each light valve of the low light valve system mentioned later are very troublesome

because the laser beam sweeps from the surface of the photo paper at a high speed, the exposure of each point now has 8 branches nationwide. The time is very short, about 200 nanoseconds, which requires the use of special photo paper. The working efficiency of laser color expansion is very high. The printing of 4 "X6" pieces of photos can reach 2000 per hour. If the sensitivity of photo paper is further improved, the printing of 5-inch-wide photos can even reach 10000 per hour

exposure of pixels

in laser color amplification technology, the exposure time of each pixel is nanosecond, and in other exposure technologies, the exposure time of pixels is microsecond and millisecond. In laser color amplification equipment, the exposure time of each pixel is fixed, usually 100 nanoseconds or less. The exposure is controlled by changing the intensity of the laser. Because the exposure time is short, it is necessary to use special high-speed photo paper to achieve the desired effect. Other digital exposure technologies have an exposure time of microseconds per pixel, and the exposure amount is controlled by the exposure time and exposure times. They can all use ordinary color photo paper

production capacity

pixel exposure time limits production 2 The electronic stopwatch starts timing 1z minutes at the same time as the starter table. At present, the production capacity of laser color amplification technology can reach 2000 sheets per hour (4x6 inches), and the potential is 10000 sheets per hour; Due to the maximum exposure time of pixels reaching a few milliseconds, the production capacity of low light level valve technology and fluorescent tube technology is limited to 1200 pieces per hour (4x6 inches); DLP technology benefits from multiple exposures, with a production capacity of 2260 (4x6 inches) per hour and a potential of 10000 per hour

output width

the design of the device determines the output width. Laser color expansion technology can output images with a width of 20 inches. Low light level valve technology, LED technology and fluorescent tube technology ensure the accuracy of 300 or 400DPI, and can output to 12 inches, which is enough in the general color expansion industry. At present, DLP technology can only output images with a width of less than 5 inches. If the output accuracy is reduced to 160dpi, the competitiveness of the market will be further improved. It can output images with a width of 8 inches, but the image quality is very poor

source: Huicong

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