irfpa ROIC crosstalk test circuit and test method based on electric injection mode

Abstract

The invention provides an IRFPA ROIC crosstalk testing circuit based on an electric injection mode and a testing method thereof. The circuit comprises a photosensitive pixel signal output end which isconnected with the pixel signal input end of a signal selecting circuit, and a testing circuit signal transmitting end which is connected with the signal receiving end of a photoelectric switching circuit. The signal transmitting end of the photoelectric switching circuit is connected with one end of a working testing switch. The other end of the working testing switch is connected with an injecting tube signal receiving end. An injecting tube signal transmitting end is connected with the testing signal receiving end of the signal selecting circuit. The output end of the signal selecting circuit is connected with the ROIC signal receiving end of a readout circuit. The ROIC signal output end of the readout circuit is connected with the signal receiving end of a computer automatic testing system.

Description

technical field [0001] The invention belongs to the technical field of image sensors, and relates to a crosstalk test circuit and a test method of a hybrid pyroelectric IRFPA image sensor ROIC device. Background technique [0002] In recent years, with the development of infrared detection technology, the application of infrared technology has become more and more extensive. Infrared detection systems have been widely used in military and civilian fields, and have huge market development potential, which has attracted the attention of all countries. It is more and more urgent to study various technologies related to infrared detectors with independent property rights. Taking ROIC, an important part of the domestic pyroelectric hybrid IRFPA, as the research object, it is of great significance to test it, study the test method of crosstalk parameters, and build a test system. [0003] Pyroelectric IRFPA has been widely valued at home and abroad because of its many advantages...

AI Technical Summary

Problems solved by technology

[0005] The traditional crosstalk test method adopts the optical injection method. The system is very large and complex. To realize the accurate test of crosstalk, the control problem of the system must be solved, and the excellent focusing optical system and precision displacement mechanism should be designed to achieve good focus and reduce system noise.

In recent years, application requirements and technological progress have promoted the development of IRFPA technology. The scale of IRFPA arrays is getting larger and larger, while the size of detector units (which has reached 20-30μm) and spacing are getting smaller and smaller. While improving the performance of thermal imaging systems , which directly affects the crosstalk performance of the IRFPA, not only the influence between adjacent detector units becomes more prominent, but also the size of the detector unit has entered the optical diffraction limit, that is, it is difficult to limit the size of the small infrared spot within one detector unit , the traditional infrared small spot test method and equipment are already facing the danger of failure in principle

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