Opto-mechanics infrared imager based on hartmann wavefront sensor

Abstract

The invention relates to a photodynamic infrared imaging instrument based on a Hartmann wavefront sensor. The invention comprises an infrared imaging system, a focal plane array, a cold light source system, an optical readout system and an IR image restorator; an infrared object images on the focal plane array by the infrared imaging system; infrared thermal radiation gets an FPA unit in the focal plane array to produce slight deformation, then standard plane waves emitted by the cold light source system irradiate on the FPA unit by a spectroscope and are reflected in order that the wavefront information with a slight surface-shape change can enter the optical readout system by the spectroscope; wavefront detection is carried out on the wavefront information by the Hartmann wavefront sensor of the optical readout system, then the thermotropic corner information of each FPA unit is extracted from the wavefront information detected by the optical readout system and reconstructed to an infrared image of a detected object by the IR image restorator according to relative algorithm. The photodynamic infrared imaging instrument utilizes the Hartmann wavefront sensor, has the advantages of detecting wavefront signals in high precision and high frame rate and improves the sensitivity of the photodynamic infrared imaging instrument, thereby acquiring the infrared image with better quality.

Description

technical field [0001] The invention relates to an optomechanical infrared imager, in particular to an optomechanical infrared imager based on a Hartmann wavefront sensor. Background technique [0002] Infrared thermal imager (thermal imager or infrared thermal imager) is based on the basic principle that all objects above absolute temperature zero (-273°C) radiate infrared rays. Find and identify targets. It is a detection device that converts it into an electrical signal, and then generates a thermal image and temperature value on the display, accurately quantifies the detected heat, and can calculate the temperature value. Because the infrared thermal imager does not need any light source to illuminate when working. Therefore, it can reveal the camouflage, and can detect the existing persistent images, and it can also clearly display high-distant targets. It is widely used in national defense, public security, scientific research and other fields. [0003] Traditional...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the traditional photomechanical infrared imager, which is limited by the sensitivity of the optical readout system and cannot detect the infrared image of the weak infrared radiation target; The Hartmann wavefront sensor of the wavefront detects the light wavefront with rotation angle information, and then uses the wavefront to restore the infrared image of the target; the optomechanical infrared imager based on this device can detect weak infrared radiation targets at high frequency Detection provides a core solution for obtaining infrared images of weak infrared radiation targets

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