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Method for making computer-made color rainbow hologram

A technology of rainbow hologram and production method, which is applied in the direction of instruments, etc., can solve the problems of high noise in the image, difficult to accurately overlap the three-color image, etc., and achieve the effect of high image definition and uniform light distribution.

Active Publication Date: 2020-01-10
XIAMEN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] The present invention provides a computer-made color rainbow hologram manufacturing method, aiming at improving the problem of synthesizing a color image through the reconstructed image of a color separation hologram, the three-color image is difficult to accurately overlap, and the image has a lot of noise

Method used

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  • Method for making computer-made color rainbow hologram
  • Method for making computer-made color rainbow hologram
  • Method for making computer-made color rainbow hologram

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Experimental program
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Embodiment 1

[0047] refer to figure 1 with figure 2 Shown, the making method of computerized color rainbow hologram, described making method comprises:

[0048] S1. Obtain the three-dimensional information of the object, and the three-dimensional information includes the spatial coordinates (x o ,y o ,z o ) and color information (r o , g o ,b o );

[0049] S2. According to the three-dimensional information of the object, the object is decomposed into three primary color objects of red, green, and blue. The three-dimensional information of the object point of the three primary color objects is (x or ,y or ,z or ,r o ), (x og ,y og ,z og , g o ) and (x ob ,y ob ,z ob ,b o );

[0050] S3, calculating the object light wave distribution of the object point of the three-primary-color object on the holographic recording surface, and introducing reference light to interfere with the object light of the three-primary-color object to obtain a hologram;

[0051] S4, introducing rep...

Embodiment 2

[0084] refer to Figure 6 to Figure 8 As shown, the three-dimensional model of the object is established by using EXULUS-4K1 / M, and its pixel interval is 3.74um. The three-dimensional model object is decomposed into three primary color objects, and the equivalent position of the three primary color objects is calculated.

[0085] Relevant parameters: The recording area is 15.6mm x 9.2mm. If z=400mm, h(x 0 ,y 0 ) near =40mm, θ=4°, then the sampling interval of the hologram is 3.753μm, which can well meet the parameters of SLM. Calculate H separately 1r ,H 1g ,H 1b . h 1r ,H 1g ,H 1b The calculation parameter settings are shown in Table (1).

[0086] Table 1, H 1r ,H 1g ,H 1b calculation parameters

[0087]

[0088] As shown in the figure, H 1r ,H 1g ,H 1b After optical reconstruction, it interferes with the reference light to record a color hologram H 2 .

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Abstract

The invention provides a production method for a computer generated color rainbow hologram. The production method comprises the steps of S1, obtaining three-dimensional information of an object, wherein the three-dimensional information comprises a space coordinate (x<o>, y<o>, z<o>) and color information (r<o>, g<o>, b<o>) of each object point on the object; S2, decomposing the object into a red, green and blue three-primary color object according to the three-dimensional information of the object, wherein the object point three-dimensional information of the three-primary color object is (x<or>, y<or>, z<or>, r<o>), (x<og>, y<og>, z<og>, g<o>) and (x<ob>, y<ob>, z<ob>, b<o>) which are calculated according to a basic object image relationship of the hologram; S3, calculating object light wave distribution of object points of the three-primary color object on a holographic recording surface, and introducing reference light and object light of the three-primary color object to carry out interference, thereby obtaining the hologram; and S4, introducing reconstruction light to irradiate the hologram and carry out diffraction to form a color object reconstruction image. According to the method provided by the invention, the rainbow hologram containing three-primary color equivalent object light wave is photographed, and through white light reconstruction, three-primary color images can be overlapped in a space, thereby realizing a color effect. The color object reconstruction image produced by the production method provided by the invention has the advantages of convenient and simple production, uniform light distribution and high image definition.

Description

technical field [0001] The invention relates to a method for making a computerized color rainbow hologram. Background technique [0002] Holographic technology is widely used in three-dimensional display because it can reproduce the phase and amplitude of objects at the same time. With the development of computer technology and display output equipment, the research of computer-made holographic technology in three-dimensional display has made great progress. [0003] However, the current computer-made color rainbow hologram needs to shoot three color-separation rainbow holograms, and then synthesize a color image from the reproduced images of the color-separation holograms. In this method, the workload of shooting three-color holograms is heavy, and it is difficult to accurately overlap the three-color images. The requirements for the optical path are very high, the production process is complicated, and the optical path is difficult to align, the laser speckle is large, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/26
CPCG03H1/26G03H1/268G03H2001/2685
Inventor 甘亮勤曾胜财周承仙杨上供
Owner XIAMEN UNIV OF TECH
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