Liquid crystal phased array ghost imaging system and imaging method thereof

Abstract

The invention discloses a liquid crystal phased array ghost imaging system and an imaging method thereof, belonging to the field of photoelectric imaging. The liquid crystal phased array ghost imagingsystem disclosed by the invention comprises a laser, a collimating lens, a digital micro-mirror device DMD, a spatial light modulator SLM, a single-pixel detector, an FPGA main control circuit, a first lens group and a second lens group. A modulation matrix module is used for controlling the work of the digital micro-mirror device and the spatial light modulator. A laser trigger module is used for controlling the working state of the laser. A coincidence calculation module is used for computing imaging. The first lens group is used for focusing. The second lens group is used for converging light beams. The invention further discloses a liquid crystal phased array ghost imaging method which is implemented based on the liquid crystal phased array ghost imaging system. The structure of the liquid crystal phased array ghost imaging system can be simplified under the condition that a speckle light field of a required structure is obtained. The system and the method have the advantages of flexible form and high imaging efficiency.

Description

technical field [0001] The invention belongs to the field of photoelectric imaging, in particular to a phased array ghost imaging system and an imaging method thereof. Background technique [0002] Ghost imaging is a new type of optical imaging technology developed in the field of quantum optics in the past 30 years. The imaging method of ghost imaging is different from the traditional lens imaging method. This method includes a reference arm and a detection arm. The reference arm is a high-resolution array The detector, the detection arm is a barrel detector, in which the barrel detector collects the total light intensity information after the light path passes through the object to be detected. The subsequent light field information. Neither of them can image the target alone, but the information of the detected object can be retrieved after the second-order cross-correlation operation is performed on the signals of the two arms. Ghost imaging is non-local, and can be im...

AI Technical Summary

Problems solved by technology

However, some existing ghost imaging methods based on fiber arrays have complicated system structures, including many devices such as fiber amplifiers, fiber couplers, and electro-optical phase modulators, which are not conducive to the miniaturization and integration of the system.

At the same time, it is limited by the arrangement of the optical fiber array, which is mostly ring, square, hexagonal, etc., and the corresponding speckle light field is relatively simple.

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