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Rectangular spherical grating 4D picture

A spherical grating, 4D technology, applied in optics, optical components, instruments, etc., can solve the problems of image gray and fog interference, and pattern-type 3D pictures have little effect.

Inactive Publication Date: 2014-10-29
BEIJING KANGDEXIN 3D TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

image 3 The spherical grating shown can be divided into a spherical mirror imaging area (4) and a non-imaging area (5). The image directly passing through the non-imaging area (5) forms fog interference, which is very unfavorable for forming a clear and thorough three-dimensional image , but has little effect on patterned 3D images

Method used

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  • Rectangular spherical grating 4D picture
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  • Rectangular spherical grating 4D picture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1, making a flipped 4D image with a format of 400mm*300mm and a rectangular spherical grating pitch a=b=0.3617mm.

[0045] Use the camera to move on the slide rail to shoot stereo images, each group takes 10 pictures, totally 5 groups of different pictures. The matrix sequence composed of these images has stereoscopic parallax in the X direction, and forms a flip sequence in the Y direction. The 10*5 images are uniformly cropped, and the non-proportional compression is adjusted to 1106*830 pixels, and the actual size is precisely 400.04mm *300.21mm. After orthogonal sampling 4D synthesis, the pixel size becomes 11060*4150, using 6*6 grid, the output precision of the CTP plate is 4800dpi*2400dpi, and the 4D composite image needs to be normalized and interpolated to 12600*4728 pixels. Then color separation into CMYK files, grid processing into four 1bit TIF images of 75600*28368 pixels, adding overprint marks, exposing and outputting CTP version, UV printing t...

Embodiment 2

[0046] Embodiment 2, making a moving 4D picture with a format of 600mm*600mm, a rectangular spherical grating pitch a=0.3617mm, and b=0.635mm.

[0047] Use 10 horizontally arranged cameras to continuously shoot images for a period of time, each group has 10 images, and the matrix sequence composed of 20 groups of images has stereoscopic parallax in the X direction, and forms a time series change in the Y direction. The 10*20 images The image is uniformly cropped, and the non-proportional compression is adjusted to 1659*945 pixels, and the actual size is precisely 600.06mm*600.08mm. After orthogonal sampling 4D synthesis, the pixel size becomes 16590*18900, using 6*6 grids, the output precision of the CTP plate is 4000dpi*4000dpi, and the 4D composite image needs to be normalized and interpolated to 15750*15750 pixels. Then color separation into CMYK files, grid processing into four 1bit TIF images of 94500*94500 pixels, adding overprint marks, exposing and outputting CTP versi...

Embodiment 3

[0048] Embodiment 3, making a 360° 4D picture with a format of 400mm*400mm and a rectangular spherical grating pitch a=b=0.3617mm.

[0049] 10*10 cameras arranged in a matrix are used to shoot stereoscopic images, each group has 10 images, and the matrix sequence composed of 10 groups of images has stereoscopic parallax in the X and Y directions. The 10*10 images are uniformly cropped and non-equal The compression is adjusted to 1106*1106 pixels, and the actual size is exactly 400.04mm*400.04mm. After orthogonal sampling 4D synthesis, the pixel size becomes 11060*11060, using 6*6 grid, the output precision of the CTP plate is 4000dpi*4000dpi, and the 4D composite image needs to be normalized and interpolated to 10500*10500 pixels. Then color separation into CMYK files, grid processing into four 1bit TIF images of 63000*63000 pixels, adding overprint marks, exposure and output CTP version, UV direct printing of the image on the back of the rectangular spherical grating, forming...

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Abstract

The invention discloses a rectangular spherical grating 4D picture design method and random center dot printing technology, and provides a more comprehensive solution to the 4D picture design, processing and material problems. A 4D picture is composed of a rectangular spherical grating and a 4D composite graph, and can be classified into three types which are 360-degree stereoscopic image, an active stereoscopic image and an overturning stereoscopic image. A new type of product is provided for printing, stationery and especially ground advertising industries. Compared with a lenticular stereoscopic picture, the rectangular spherical grating 4D picture has a higher degree of freedom in the viewing direction, and has a prominent advantage of presenting an active stereoscopic image on one picture.

Description

Technical field: [0001] The invention belongs to the technical field of optical display, and relates to a structure of a spherical grating and a method for hanging a net for 4D picture printing. Background technique: [0002] Lenticular stereoscopic pictures are gradually popularized in photography, advertising, printing and decoration industries due to their advantages of free viewing with naked eyes, strong stereoscopic effect and good adaptability. Stereoscopic images are usually composed of lenticular gratings and 3D composite images. 3D composite images are characterized by rich image details and a large amount of information. Generally, high-precision digital laser printing, color photo printing, and high-screen printing are required for output. [0003] Patent application No. 99211778.X discloses the basic structure of 4D grating images. Nearly 10 raster stereoscopic images can be displayed sequentially by printing or three-color laser printing. Patent application No....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/22G09F19/12
Inventor 邓兴峰张保全
Owner BEIJING KANGDEXIN 3D TECH
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