Infrared thermal imager NETD (noise equivalent temperature difference) and MRTD (minimum resolvable temperature difference) rapid testing device and method

A technology of infrared thermal imager and testing method, which is applied in the direction of measuring devices, radiation pyrometry, instruments, etc., can solve the problems of reducing the efficiency of the testing process, and achieve the effect of saving waiting time and improving computing efficiency
CN110470404AActive Publication Date: 2019-11-19成都盈盛源电气科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
成都盈盛源电气科技有限公司
Publication Date
2019-11-19

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Abstract

The invention discloses an infrared thermal imager NETD (noise equivalent temperature difference) and MRTD (minimum resolvable temperature difference) rapid testing device and method. According to theinfrared thermal imager NETD (noise equivalent temperature difference) and MRTD (minimum resolvable temperature difference) rapid testing device and method of the invention, an upper computer controls the on-off time of a prism in a DMD chip through a DMD controller through adopting a pulse width modulation technology, so that the duty ratio of radiation signals reflected into a parallel light tube by the DMD chip is changed; a corresponding relation between blackbody temperature and the duty ratio of the radiation signal entering the parallel light tube is established; the duty ratio of theradiation signal entering the parallel light tube is adjusted, so that the detector output signal voltages of a to-be-detected infrared thermal imager which are corresponding to different duty ratiosare measured; and NETD and MRTD are calculated according to the measured detector output signal voltages of the to-be-detected infrared thermal imager. According to the method of the invention, the duty ratio of the radiation signal entering the parallel light tube is controlled, so that final radiation energy is changed; and therefore, the waiting time of a blackbody temperature change process isshortened, and the calculation efficiency of the NETD and the MRTD is improved.
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Description

technical field

[0001] The invention belongs to the field of infrared thermal imager testing, in particular to a rapid detection technology for infrared thermal imager NETD and MRTD testing. Background technique

[0002] Infrared camera is a two-dimensional plane imaging infrared system. The infrared camera can receive, identify and analyze the infrared radiation signal of things, and convert it into an electrical signal output, so as to measure the intensity of infrared radiation. The infrared thermal imaging camera uses the infrared detector and the optical imaging objective lens to receive the infrared radiation energy distribution pattern of the measured target and reflect it on the photosensitive element of the infrared detector to obtain an infrared thermal image. Infrared thermal imaging cameras have been widely used in military, industrial, medical and health, scientific research and environmental detection and other fields.

[0003] Noise equivalent temperature di...

Claims

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