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Large-scaled high-definition color Fresnel holographic fabrication method and display system

A technology of Fresnel holography and production method, applied in the field of large-size high-resolution color Fresnel holography production method and display system, which can solve the influence of hologram reproduction image, large monochromatic LED light-emitting area, and redesign of color filter and replace issues such as

Inactive Publication Date: 2018-09-11
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. When the calculated hologram size and unit hologram size change, the color filter still needs to be redesigned and replaced;
[0006] 3. The alignment technology between the color filter and the unit hologram is difficult and has poor flexibility;
[0007] 4. Due to spatial sampling, the theoretical analysis of the image points of the hologram reconstruction image is not carried out, and the spatial sampling has an impact on the hologram reconstruction image;
[0008] 5. The red, green and blue single-color LEDs used have a large light-emitting area, and the image blur caused by the light-emitting area is also relatively serious

Method used

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  • Large-scaled high-definition color Fresnel holographic fabrication method and display system
  • Large-scaled high-definition color Fresnel holographic fabrication method and display system
  • Large-scaled high-definition color Fresnel holographic fabrication method and display system

Examples

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Embodiment 1

[0088] This example figure 1 Shown is a schematic diagram of a large-scale high-resolution color Fresnel holographic design, H or 、H og 、H ob Fresnel holograms of the red, green and blue components calculated for the three primary color components of a colored object, each segmented into multiple horizontal bars, H orgb It is a color Fresnel hologram formed by dividing and recombining holograms of three primary color components; in order to avoid color crosstalk between two unit holograms of different colors, there is a certain gap between the two unit holograms, the width for w p .

[0089] The following is a specific analysis of the impact of hologram information redundancy and spatial sampling on holographic reconstruction images:

[0090] Suppose the hologram length is w h =65mm, the diffraction distance is the photopic distance z=25cm, and the wavelength λ=555nm, which is the most sensitive human eye, is used for calculation, and the image point size reproduced by ...

Embodiment 2

[0155] This embodiment is described on the basis of Embodiment 1 by setting specific parameters.

[0156] according to Figure 5 The schematic diagram of the optical system is designed, and the central wavelengths of the three monochromatic LEDs are λ r =630nm,λ g =521nm,λ b =468nm, its spectral half width is △λ r =17nm, Δλ g =38nm, △λ b = 28nm. The powers of the three-color LEDs used are: the power of the red LED is 5w, the power of the green LED is 3w, and the power of the blue LED is 3w. lens 1 、lens 3 and lens 5 It is a doublet lens with the same parameters, the aperture is 25.4mm, and the focal length is 30mm. filter 1 、Filter 2 and Filter 3 It is an adjustable rectangular aperture, the aperture adjustment range is 0.1mm to 12mm, located at the lens 1 、lens 3 and lens 5 After double the focal length. led r ,LED g and LED b For the single-chip LED light source used, they are respectively located in the lens 1 、lens 3 and lens 5 At the first double fo...

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Abstract

The invention discloses a large-scaled high-definition color Fresnel holographic fabrication method and a display system. The method comprises the following steps: analyzing the influence of spatial sampling upon reconstructed image points of a Fresnel hologram and providing parameter conditions for color Fresnel holographic realization; calculating three-primary Fresnel holograms for color three-dimensional objects, designing the dimensions of each color unit hologram in accordance with the parameter conditions, designing a gap between the dimensions of the two adjacent color unit holograms,decomposing and reorganizing the three-primary Fresnel holograms according to the dimensions of each color unit hologram and gap parameters of the adjacent color unit holograms, and obtaining color Fresnel holograms; and conducting imaging on color grating images through a designed optical system, placing the color Fresnel holograms on image planes of the color grating images and adjusting the holograms, wherein the color grating images are consistent with each color unit hologram in the color Fresnel holograms in parameter and position. In this way, large-scaled high-definition color Fresnelhologram three-dimensional display is achieved.

Description

technical field [0001] The invention belongs to the technical field of holographic three-dimensional display, and in particular relates to a large-size high-resolution color Fresnel holographic manufacturing method and a display system. Background technique [0002] Holographic three-dimensional display, using the holographic principle to realize the real three-dimensional display, can see all the characteristics of the three-dimensional display and has parallax effect. Using this technology can completely reproduce the phase and amplitude information of the three-dimensional scene. It is currently recognized as the most Ideal for 3D display technology. Among them, large-scale holographic display technologies mainly include computational rainbow holography, computational image plane holography and computational Fresnel holography, but the above-mentioned holographic displays have shortcomings. Specifically, computational rainbow holography only includes parallax in one direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/08
CPCG03H1/08
Inventor 杨鑫王辉李勇许富洋
Owner ZHEJIANG NORMAL UNIVERSITY
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