A compression ultra-high-speed photography device based on electro-optic crystal deflection

Abstract

The invention discloses a compressed ultra-high-speed photography device based on the deflection of an electro-optic crystal. The device first encodes the dynamic scene image through a digital micromirror device, and then utilizes the Pockels effect of the electro-optic crystal to encode the information arriving at the electro-optic crystal at different times. It is deflected to different positions, superimposed and imaged in a CCD camera, and finally image reconstruction is performed using the augmented Lagrangian algorithm, which belongs to the imaging device in the field of computational imaging. In the present invention, a Glan prism, a first convex lens, and a digital micromirror device are sequentially placed behind the dynamic scene position, and an electro-optic crystal, a second convex lens, a third convex lens and a CCD camera are sequentially placed in the optical path reflected by the digital micromirror device. Finally, the acquisition results of the camera are output to the computer. The device can reconstruct an ultra-fast dynamic process in a single shooting without repeating events.

Description

technical field [0001] The invention belongs to the field of ultrafast imaging technology, and can be used for three-dimensional x-y-t reconstruction of ultrafast physical, chemical, biological and other processes, wherein x-y is a space coordinate, and t is a time coordinate, and can also be used for micro-nano processing and dynamic observation of some three-dimensional objects. Background technique [0002] High-speed imaging plays an integral role in solving countless scientific mysteries, advancing medicine, creating artistic effects, and revealing the inner workings of things like cells and even machines. The earliest documented pursuit of high-speed photography dates back to the 1878 record of a galloping horse and the 1887 photograph of a supersonic bullet. However, until the end of the twentieth century, the imaging speed was always 10^5 frames per second. Later, the emergence of electronic imaging sensors based on charge-coupled devices (CCD) and complementary met...

AI Technical Summary

Problems solved by technology

Although this sensor has been widely used, the imaging speed is limited by the chip storage and electronic readout speed of CCD and CMOS, and it cannot be directly detected in many ultra-fast fields.

Images