Active near infrared camera operating distance evaluation method based on equivalent illumination

Abstract

The invention provides an active near infrared camera operating distance evaluation method based on equivalent illumination. The method comprises the following steps: step 1, the scattering angle Alpha of outgoing beams of an infra-red lamp on a camera is measured under a darkroom environment; step 2, the total radiant power Phi 0 of the outgoing beams of the infra-red lamp on the camera is determined; step 3, the relationship between the irradiance of the infra-red lamp and the radiation distance L in front of the infra-red lamp is determined according to the atmosphere transmission empirical formula; step 4, the position relation between the camera and a target generator is determined; step 5, the irradiance E on the incident plane of the camera is obtained; step 6, the limit resolution angle Sigma of the camera under the irradiance is determined; and step 7, whether the nominal distance Lb on the camera is qualified or not is determined according to the limit resolution angle Sigma. The method provided by the invention can be achieved in a laboratory, is free from influences of outdoor objective factors, and has a good evaluation effect.

Description

technical field [0001] The invention relates to a method for evaluating the operating distance of an active near-infrared camera based on equivalent lighting, in particular to a method for evaluating the actual operating distance of an active near-infrared camera in a dark room by using the principle of equivalent lighting. Background technique [0002] Active near-infrared imaging technology in continuous lighting mode, as the earliest night vision technology mode, has the characteristics of high technical maturity, relatively low cost, long working distance, and good image quality. It played an important role in early night battlefield reconnaissance and sighting. important role. In recent years, with the development of laser technology and CCD / CMOS imaging technology, CCD / CMOS imaging technology using near-infrared auxiliary lighting has been successfully applied in the fields of nighttime border and sea defense surveillance, safety monitoring, and vehicle assisted drivin...

AI Technical Summary

Problems solved by technology

At present, the outdoor measurement method is generally adopted. As for how to effectively detect the working distance of the product to be tested in the laboratory, it has not been seen in the literature.

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