A method for dynamically refreshing volume holographic three-dimensional display

Abstract

The invention relates to a dynamic refresh volume holographic three-dimensional displaying method. The method includes the following steps: 1) an integral holographic three-dimensional imaging system is arranged and comprises a light path recording system, a light path reading system, a light path erasing system and a recording medium, and the light path recording system comprises an object light path system and a reference light path system; 2) a photochromic material is used as the recording medium, and volume holographic recording storage is performed on images of an object to be tested from a plurality of angles; 3) the object light path system is closed, and the reference light path system is used for reading three-dimensional image information; and 4) the light path recording system is closed, and the light path erasing system is opened to radiate an area of the recording medium which needs to be erased so as to erase the three-dimensional image information stored on the recording medium. The dynamic refresh volume holographic three-dimensional displaying method can be widely applied to three-dimensional object holographic imaging.

Description

technical field [0001] The invention relates to a method for storing and displaying optical information, in particular to a method for dynamically refreshing volume holographic three-dimensional display. Background technique [0002] With the advent of the information age, people's requirements for visual experience are getting higher and higher. The traditional two-dimensional flat display is far from being able to meet people's requirements. Image display has become an important direction in the development of display technology. Most of the existing three-dimensional display technologies are pseudo-three-dimensional technologies. When the eyes receive images from two angles, a three-dimensional sense of space is produced due to the parallax of the eyes. Holographic imaging technology has realized naked-eye true three-dimensional display for the first time. Due to its high storage density and strong angle multiplexing characteristics, volume holographic technology has bec...

AI Technical Summary

Problems solved by technology

In the recording stage, a series of two-dimensional images of the object are first calculated and generated for the three-dimensional image, and one of the generated two-dimensional images is uploaded to the spatial light modulator, and the image can be stored in the One pixel on the material, then move the position of the material, upload the second image to the spatial light modulator, record this image at the second pixel of the material, repeat this process to store all the images in the material, and read When using another wavelength of readout light to irradiate the material at the Bragg angle, the three-dimensional object light can be reproduced. In the erasing stage, the material is irradiated with a uniform spot of the same wavelength as the readout light to achieve the erasing effect. Although the above method achieves A breakthrough in refreshable holographic display, but due to the slow refresh rate (about 3 minutes per picture) and the need to load thousands of volts on the material, it is difficult to meet actual needs

Since then, the team can record 100 holographic pixels at a time by using the method of lens array, which greatly shortens the refresh time (about 2 seconds per picture). However, due to the use of photopolymer holographic display materials, it is still necessary to load The voltage of kilovolts, and the refresh rate is still slow, which seriously limits the practicality of the system

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