Compressed super-speed photographing device based on electro-optic crystal deflection

Abstract

The invention discloses a compressed super-speed photographing device based on an electro-optic crystal deflection, and belongs to imaging devices in the field of computational imaging. The principleof the device comprises the steps of: encoding a dynamic scene image by means of a digital micro-mirror device; deflecting information arriving at the electro-optic crystal at different times to different positions by POCKELS effect of the electro-optic crystal, and imaging in a CCD camera after stacking; and performing image reconstruction using an augmented lagrangian algorithm. In the present invention, a glan prism, a first convex lens, and a digital micro-mirror device are sequentially placed after the position of dynamic scene. An electro-optic crystal, a second convex lens, a third convex lens, and a CCD camera are sequentially placed in the light path reflected by the digital micro-mirror device. The acquisition result of the camera is finally output to a computer terminal. According to the compressed super-speed photographing device based on the electro-optic crystal deflection, a super-speed dynamic process can be reconstructed by performing single shot on non-repeated event.

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.

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