Three-dimensional holographic laser projection system based on high-speed rotating optical medium

Abstract

The invention provides a high-speed rotary optical medium based three-dimensional holographic laser projection system. A control circuit, an X axis galvanometer driver, a Y axis galvanometer driver and a motor with a coder are adopted for controlling the regular data which is required between the rotary angle of a transparent screen and the rotary angle of a laser galvanometer; therefore, the problem of irregularity between the rotary angle of the transparent screen and the rotary angle of the laser galvanometer in the three-dimensional holographic laser projection process is avoided; it is ensured that the to-be-presented image can be presented on the transparent screen in a rapid, efficient and accurate manner; and the scanning precision, the stability and the practicability of the system are improved to a large extent.

Description

technical field [0001] The invention relates to a true three-dimensional holographic laser projection technology, in particular to a three-dimensional holographic laser projection technology based on a high-speed rotating optical medium. Background technique [0002] The laser vibrating mirror is composed of X-Y optical scanning head, electronic drive amplifier and optical reflector. The optical scanning head is driven by the electronic drive amplifier circuit to realize the two-dimensional deflection of the laser beam in the X-Y plane. It is a high-precision, high-speed Servo control system. Has been widely used in laser cutting, laser drilling and other fields. Chinese Invention Patent Application Publication (publication number CN102636435A) discloses a visual photoacoustic imaging system based on three-dimensional dynamic focusing laser galvanometer scanning, which uses a three-dimensional dynamic focusing laser 3D visualization of photoacoustic imaging. [0003] Thre...

AI Technical Summary

Problems solved by technology

This system is suitable for displaying computer images and dynamic pictures, however, since the image in the display panel must be consistent with the frequency of the display in every angle range, the update rate of the image on the screen is limited in some specific positions. Limitations (Maeda H, Hirose K, Yamashita J, et al. All-Around Display for Video Avatar in Real World. Proc. ISMAR'03 the Second IEEE and ACM Int'l Symp, Mixed and Augmented Reality, 2003:288-289)

Because in the rotating body scanning display technology, the image is mapped to the screen according to the different angles of the screen rotation, the relationship between the screen rotation angle and the laser galvanometer system rotation angle is complicated, and it is difficult to accurately establish two The relationship between them is prone to errors and affects the quality of the image

Moreover, during the screen rotation process, the distance between the light beam and the rotating screen is constantly changing, and the brightness of the generated image will be uneven due to the different positions of the light beam during the imaging process, which will affect the image quality.

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