Ultra-high-speed compression photography device based on compressive sensing and streak camera principles
A streak camera and photographic device technology, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of limited practical application, limited imaging speed, etc., to improve the quality of reconstructed images, occupying memory Highly secure, small memory footprint
Active Publication Date: 2020-02-14
EAST CHINA NORMAL UNIV
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Problems solved by technology
Although this sensor has a very wide range of influences and applications, the imaging speed based on CCD and CMOS technology is limited by the chip storage and electronic readout speed, so it is impossible to further increase the imaging speed, which limits the practical application of many related fields. , such as measuring the speed of light or moving objects close to the speed of light
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[0030] In this embodiment, the luminescence process of a single nanoparticle is simulated.
[0031] The components of this embodiment refer to figure 1 set up. The light reaches the beam splitter 4 through the first lens 1, and then splits into two to become two lines of light with equal intensity, and the reflected one reaches the second lens 2 after being modulated by the first spatial light modulator 5. Similarly, The transmitted one reaches the third lens 3 after being modulated by the second spatial light modulator 6. By placing four plane mirrors 7, 8, 9, and 10, both paths of light enter the streak camera 11 with a built-in CCD, and finally the decoder 12 Receive the image captured by the built-in CCD of the streak camera, and use the TwIST algorithm to decode and reconstruct the image.
[0032] The working process of this embodiment:
[0033]The high-speed dynamic scene is first imaged by the first lens 1, and then reaches the beam splitter 4 to form two optical pat...
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The present invention provides an ultra-high-speed compression photography device based on the principle of compressed sensing and streak camera, which comprises: a lens, a beam splitter, a spatial light modulator, a plane mirror, a streak camera with a built-in CCD, and a decoder; The modulator encodes the captured image information, then uses the streak camera to superimpose and compress the image information at different times, and finally reconstructs the image based on the principle of compressed sensing. This device can perform two-dimensional imaging of the ultra-fast process under the condition of a certain imaging speed of the streak camera, output the image information to the decoder, and reconstruct the dynamic process of the two-dimensional image with high quality (x‑y‑t) through the TwIST algorithm , its imaging speed can reach 10^12 frames per second, and it is a single-shot measurement technology that can measure non-repetitive ultrafast events.
Description
technical field [0001] The invention belongs to the field of ultrafast imaging technology, and relates to a two-dimensional image measurement technology that can be used for nanosecond and picosecond ultrafast physical, chemical, biological and other processes, and can be used to measure picosecond laser pulses of arbitrary shape in the time-frequency domain , observe the dynamic process of micro-nano processing, analyze the dynamic process of molecular structure change under strong light field, etc. Background technique [0002] Capturing images of transient scenes at high speed has always been the dream and goal of photographers. The most typical early examples are the recording of running horses in 1878 and supersonic bullet photography in 1887. However, until the end of the twentieth century, this ultra-high-speed imaging still had not been broken through, when the imaging speed was 10^5 frames per second. Later, with the emergence of electronic imaging sensors based on...
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IPC IPC(8): H04N5/225
CPCH04N23/54H04N23/50H04N23/55
Inventor 曹烽燕杨承帅杨岩孙真荣张诗按
Owner EAST CHINA NORMAL UNIV