Imaging device and imaging method

Abstract

The invention discloses an imaging device and an imaging method. The imaging device comprises a pulse light source, a directional scanning mechanism, a light modulation unit, a projection unit, a light receiving unit, a central processing unit, a display unit, a control unit; the pulse light source, the directional scanning mechanism, the light modulation unit, the central processing unit and the display unit are sequentially arranged along a light path, and the control unit is connected with the directional scanning mechanism, the light modulation unit and the central processing unit. The control unit controls the directional scanning mechanism and the light modulation unit to work cooperatively, scanning of light beams on the light modulation unit is achieved, and therefore all light beam energy can act on a local area in a concentrated mode, output energy is greatly improved, the propagation distance of useful light beams is increased, and the imaging distance is increased; a plurality of receiving signals are integrated as receiving signals for one-time observation, so that random noise is reduced, the signal-to-noise ratio is improved; and in addition, view field expansion can be realized only by one or a few scanning mechanisms, and the device is low in processing and assembling difficulty and high in stability.

Description

technical field [0001] The invention relates to the field of target detection, identification and imaging, in particular to an imaging device and an imaging method. Background technique [0002] Time-of-flight (TOF)-based laser imaging radar has the capability of over-the-horizon three-dimensional detection, and is an indispensable detection method for future applications such as intelligent driving, remote sensing mapping, intelligent monitoring, and scene reproduction. [0003] At present, the commonly used laser imaging radar adopts the "point-to-point" direct information acquisition mode. Multi-line imaging is achieved through multiple sets of "transmit-receive" units combined with mechanical scanning or beam deflection devices. On the one hand, this imaging method has a limited imaging distance, and the resolution of long-distance imaging is extremely low; on the other hand, the system requires high precision optical machining and alignment accuracy, which makes it dif...

AI Technical Summary

Problems solved by technology

However, the existing correlative imaging technology still has the following problems: first, the incident light energy of the spatial light modulation device has a high loss, which is not conducive to long-distance detection; 1" has a relatively small number of "0-1" binary matrix, the light energy utilization rate is extremely low, and the detection distance is greatly reduced

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