Resolution test device of ultraviolet image intensifier

Abstract

The invention discloses a resolution test device of an ultraviolet image intensifier. Two spherical reflectors and two plane reflectors are placed on a base in a straight line; and the two plane reflectors are respectively placed at focus points of the two spherical reflectors, so as to form a coaxial reflection type optical system. A resolution target is placed at the focus point of the coaxial reflection type optical system; a light source is placed in back of the resolution target; ground glass is located between the resolution target and an ultraviolet light source; an image intensifier is placed on a multi-dimensional adjusting table; and a microscope is mounted on the multi-dimensional adjusting table and can be used for observing a fluorescent screen image of the resolution target. According to the test demands, a user selects the resolution target and the image intensifier is shifted to a position of a focal plane of the optical system, so as to obtain the resolution of the ultraviolet image intensifier. The resolution test device disclosed by the invention has the advantages of small appearance size and volume, and convenience for resetting. Furthermore, the transmission distance of an ultraviolet target in atmosphere is reduced, the influence of the image difference is greatly reduced, and a clear image can be obtained under a condition of a short focus distance.

Description

technical field

[0001] The invention belongs to the field of parameter testing of ultraviolet image intensifiers, in particular to a device for testing the resolution of ultraviolet image intensifiers. Background technique

[0002] In the low-light night vision technology, the low-light image intensifier is the core device of the low-light night vision technology, the decisive factor for the performance of the low-light night vision equipment, and it is also indispensable in the guidance and tracking, electro-optical countermeasures and future space-based weapons. less devices. It also plays an important role in civilian use, such as fingerprint identification.

[0003] The research on performance testing and evaluation technology of image intensifier is of great significance, and resolution is one of the most important parameters. The resolution of the image intensifier refers to focusing the standard test pattern with a certain contrast on the photocathode surface of the...

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