Three-dimension graphics direct-writing method with multi-vision angle graphical input

Abstract

The invention discloses a three-dimensional graph direct writing method for multi-visual angle graphic input, which comprises the following steps: firstly, acquiring sub-visual angle planar digital images of a three-dimensional object; secondly, performing color separation on each image, splitting the image into subgraphs, and forming subgraphs with same corresponding positions in various images into a group; thirdly, acquiring a group of subgraphs, respectively adopting an iterative Fourier transform principle to calculate light field distribution of each subgraph in a far field, extracting phase information, arranging the phase information according to the visual angle, and encoding the phase information into H1; fourthly, using a spatial light modulator to display the H1, laying the H1 on a front focal plane of a lens, forming multi-visual angle image reproduction on a rear focal plane of the lens, introducing interference light, and recording reproduced images on recording materials through an interference light path; fifthly, moving the position of the recording materials corresponding to the position of the next group of subgraphs; and sixthly, repeatedly executing the steps until all the subgraphs are recorded, and realizing recording of a three-dimensional graph. The three-dimensional graph direct writing method uses a mode of laser direct writing to manufacture the three-dimensional graph which has rich information expression characteristic.

Description

technical field [0001] The invention relates to a method for making three-dimensional graphics, in particular to a direct writing method for three-dimensional graphics suitable for plate making of large-format three-dimensional graphics and applicable to three-dimensional display, three-dimensional printing and virtual reality multi-view graphics input. Background technique [0002] When people observe an object, light is reflected from the object to form a wavefront, which propagates in all directions in space. The human eye observes different wavefronts of light from different directions. If the wavefront can be recorded and reproduced , even if the object does not exist, the human eye can still observe the existence of the virtual object. [0003] Traditional holography technology is an effective method to record the wavefront of light. It uses a coherent laser and introduces reference light for interference on the basis of object light to simultaneously record the intens...

AI Technical Summary

Problems solved by technology

[0012] However, this traditional two-step manufacturing process must be carried out on a holographic anti-vibration platform, which has great limitations:

For images with large format and large stereoscopic depth of field, lasers with long coherence length are required. Generally, helium-cadmium lasers only have a coherence length of about 10-30cm, and lasers with long coherence length are quite expensive.

[0016] ④ The flexibility of production is poor, and it is difficult to mosaic with other images

However, similar to the shortcomings of traditional rainbow holograms, due to the influence of recording optical path, optical components and laser power, as well as the size and signal-to-noise ratio of the input device, it is difficult to synthesize rainbow holograms larger than 150mm×150mm

[0019] Therefore, due to the high technical requirements, harsh conditions, and high cost of producing color 3D holographic images, it is difficult to commercialize them.

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