Double-elimination short-wave pass film system and color separation and color combination device

A short-wave-pass film system and film system technology, which is used in instruments, optical components, optics, etc. to achieve the effects of bright colors, improved image color saturation, and improved light energy utilization.

Active Publication Date: 2015-08-12
HANGZHOU KOTI OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-pass filter has three main functions: cut off near-infrared light and ultraviolet light, stabilize the transmission-cut transition wavelength and eliminate moiré fringes. It can be used in high-pixel sensors, but its infrared cut-off film adopts alternating The high refractive index layer and the low refractive index layer realize the cut-off of near-infrared light and ultraviolet light, that is, reflect near-infrared light and ultraviolet light. The infrared cut-off film is not suitable for photoelectric projection display, image acquisition system and color engineering

Method used

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  • Double-elimination short-wave pass film system and color separation and color combination device
  • Double-elimination short-wave pass film system and color separation and color combination device
  • Double-elimination short-wave pass film system and color separation and color combination device

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Experimental program
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Effect test

Embodiment 1

[0047] figure 1 It is a schematic diagram of the working principle of the Philips color separation and combiner. like figure 1 As shown, the Philips color separation combiner includes a red-transmissive blue-green prism 1 , a blue-transmissive green prism 4 and a green-transmissive prism 7 . The short-wave pass film system 2 is coated on the second prism surface of the anti-red-transparent blue-green prism 1, so that the incident white light can be divided into reflected red light and transmitted blue-green light. The film system 5 on the second prism surface of the anti-blue transparent green prism 4 can divide the incident blue-green light into reflected blue light and transmitted green light, so red (R), green (G) and blue (B) can be realized. ) color separation or color combination. figure 1 3 and 6 are air gaps.

[0048] figure 2 and image 3 It is the current Philips color separation color combiner short-wave pass film system (ie figure 1 The spectral transmittan...

Embodiment 2

[0064] Figure 7 It is a schematic diagram of the working principle of the flat color separation and color combiner. like Figure 7 As shown, the flat color separation color combiner is composed of a red-transparent blue-green flat panel 8 and a blue-transparent green flat panel 9. The short-wave pass film system 10 is coated on the first surface of the anti-red and blue-green plate 8, so that the incident white light can be divided into reflected red light and transmitted blue-green light. Similarly, the film system 11 on the first surface of the blue-transmitting green plate 9 can divide the incident blue-green light into reflected blue light and transmitted green light. So red (R), green (G), blue (B) color separation or combination can be realized.

[0065] Figure 8 and Figure 9 It is the spectral transmittance curve of the short-wave pass film system of the currently used flat color separation color combiner, where Ts refers to the transmittance of s-polarized ligh...

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Abstract

The present invention discloses a double-elimination short-wave pass film system and a color separation and color combination device. The system comprises an admittance match film system, a first main film system and a second main film system arranged on a substrate in order. The admittance match film system is formed by alternating middle refractive index films and low refractive index films. The first main film system is formed by high refractive index films, middle refractive index films and low refractive index films. The second main film system is formed by alternate high refractive index films and low refractive index films. The high refractive index films are TiO2 films or Nb2O5 films, the middle refractive index films are Al2O3 or MgO films, and the low refractive index films are SiO2 films. The double-elimination short-wave pass film system is applied to an optical filter and the color separation and color combination device, short-wave pass residual reflection and s- and p- polarized light transition wavelengths can be eliminated, the brightness, sharpness and color saturation of a display image are improved.

Description

technical field [0001] The invention relates to the field of double-elimination short-wave pass optical filters, in particular to a double-elimination short-wave pass film system and a color separation and color combiner. Background technique [0002] Short-pass optical filters are widely used in optical engineering, and their function is to transmit short-wavelength light and reflect long-wavelength light. Taking the photoelectric projection display as an example, the application of this short-pass optical filter includes three basic functions: decomposing white light into three primary color lights, synthesizing the modulated three primary color lights into a color image, and isolating the infrared light of the light source. [0003] High brightness, high definition and color reproduction are the three most concerned technical indicators in display technology, so how to improve light energy utilization, image contrast and color saturation has been a long-term problem to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B27/10
CPCG02B5/26G02B27/145
Inventor 顾培夫艾曼灵陶占辉
Owner HANGZHOU KOTI OPTICAL TECH
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