Achromatic method based on three-time exposure technology

An achromatic, sub-exposure technology, applied in the field of multi-spectral imaging, can solve the problems of high cost, time-consuming, and extremely high manufacturing process requirements

Inactive Publication Date: 2015-01-07
郑敏
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Problems solved by technology

However, this method has extremely high requirements on the manufacturing process, and is time-consuming and costly.

Method used

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  • Achromatic method based on three-time exposure technology
  • Achromatic method based on three-time exposure technology
  • Achromatic method based on three-time exposure technology

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Embodiment

[0041] The achromatic method based on the triple exposure technology disclosed in this embodiment,

[0042] The principle of achromatic aberration is as figure 1 As shown, the colored light emitted from the microdisplay passes through the collimating lens and then irradiates the coupling input grating. Through the modulation of the grating, the RGB three-color light waves are reflected in the same direction and enter the optical waveguide. At the coupling output grating, the light wave is modulated and reflected, and enters the human eye, so that the human eye can see a color image. The key issue is how to make the coupling input and output grating to achieve the desired effect. When two beams of plane waves are used to make a holographic grating by interference, the period of the grating, the angle between the two beams and the wavelength satisfy the formula

[0043] 2 Λ sin θ rec 2 ...

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Abstract

The invention provides an achromatic method based on a three-time exposure technology. The method relates to a miniature display screen, a collimating lens, a first optical grating and a second optical grating. Colored light emitted from the miniature display screen irradiates to the first optical grating after passing through the collimating lens, through modulation of the first optical grating, RGB three-color light waves can be reflected in the same direction to enter an optical waveguide, the light waves are modulated and reflected out at the second optical grating to enter human eyes, and thus colored images can be seen by the human eyes. According to the achromatic method based on the three-time exposure technology, the angle change is recorded, exposure can be conducted on the same holographic material for three times, and accordingly a grating structure capable of modulating the RGB three-color light can be obtained. A laser of 532 nm is used as a recording light source, a silver salt plate (a silver halides latex material) is selected to be used as the holographic recording material, the method is simple, effective and practical, and the method is of great economic significance to large-scale industrial production particularly.

Description

technical field [0001] The invention relates to a method for achromatic aberration based on three-time exposure technology, in particular to a method for achromatic aberration based on three-time exposure technology, and belongs to the field of multispectral imaging. Background technique [0002] The holographic waveguide grating uses the diffraction principle of the grating to pass the diffracted light through the principle of total reflection, making it enter the glass substrate to form a waveguide for propagation. s eyes. In this way, people can observe the distant scenery through the glass, and at the same time observe the image formed by the waveguide transmission. [0003] According to its physical meaning, holographic recording can be called the recording and reproduction of the wave front, which was proposed by the British physicist Dennis Gable in 1948. Geber has proved theoretically and experimentally that the amplitude and phase information of the object light w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/12
Inventor 郑敏
Owner 郑敏
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