A high-speed imaging system and method for spatial spectral filtering and frequency domain reconstruction

Abstract

The invention relates to a high-speed imaging system and method for spatial spectrum filtering frequency domain reconstruction, which solves the technical problems of the FRAME method that the crosstalk of image frequency domain information at each moment affects the spatial resolution of frequency domain reconstruction dynamic scenes and the number of frames is small. In the system, the pulsed light source is used to emit n optical pulses with different wavelengths, n≥2 and n is an integer; a structured light sequence generation unit, a high-speed scene generation unit, and a 4f spatial spectrum filter unit are arranged in sequence along the transmission direction of the optical pulses; image The acquisition unit receives the output signal of the 4f spatial spectrum filtering unit, and the image acquisition unit is connected with the data processing unit. The method includes: a pulsed light source emits n light pulses with different wavelengths; generating a structured light pulse sequence; forming a structured signal light pulse sequence; Spatial domain image and exposure; image sequence reconstructed using frequency domain reconstruction algorithm and displayed.

Description

technical field [0001] The invention relates to the technical field of high-speed imaging, in particular to a high-speed imaging system and method for spatial spectral filtering and frequency domain reconstruction. Background technique [0002] Important scientific questions in physics, chemistry, and biology all rely on high-speed optical imaging techniques for research. These high-speed optical imaging techniques can either passively rely on the fast readout of the photosensitive element or actively rely on the illumination characteristics of specially designed pulse sequences. [0003] Since the speed of traditional CCD and CMOS imaging devices is limited by the speed of electronic storage and reading, the frame rate and spatial resolution of passive high-speed digital imaging are mutually restricted. Therefore, large-format 2D or even 3D ultrafast imaging technology with high frame rate relies more on computational imaging technology. The compressed sensing ultrafast i...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing pump-probe ultra-fast imaging method cannot satisfy non-repetitive dynamic scenes, the light source in the STAMP system is complex and the brightness is low, and the requirements for imaging devices are high, and the FRAME method has image frequency at each moment. Domain information crosstalk affects the technical problems of frequency domain reconstruction of dynamic scene spatial resolution and the number of frames is small, a high-speed imaging system and method for frequency domain reconstruction of spatial spectral filtering is proposed

Images