Spatial optical axis offset system for refrigeration type infrared thermal imaging lens

Abstract

A spatial optical axis offset system for a refrigeration type infrared thermal imaging lens comprises a front lens set, a relay inverted image front set, a first reflector, a second reflector, a relayinverted image rear set, a detector protecting window, a detector sensing face and an inclined cushion block; the included angle formed between the first reflector and the relay inverted image frontset is 45 degrees, and the second reflector is perpendicular to the first reflector; it is defined that the long side direction of the detector sensing face is the axis x of a coordinate system, and acertain included angle is formed between the axis x and a connecting line between the center of the front lens set and the center of the detector sensing face; the inclined cushion block is of a triangular prism structure, the edges are arranged in the length direction of a lens cone, and the upper edges are parallel to the connecting line between the center of the front lens set and the center of the detector sensing face; by adjusting the inclined angle of the side, close to the lens cone, of the inclined cushion block, optical axis offsetting can be achieved.

Description

technical field [0001] The invention belongs to the technical field of cooling infrared thermal imaging, and in particular relates to a space optical axis offset system with small volume, low cost and convenient secondary adjustment. Background technique [0002] In the design process of the cooled infrared thermal imaging lens, in order to ensure 100% cold aperture effect, a relay transfer system will be used to match the optical system aperture with the built-in aperture of the cooled infrared detector. Due to the introduction of the relay image transfer system and the large size of the cooled infrared detector, in order to reduce the space occupied by the optical system or adapt to different outer envelopes, designers usually use the method of shifting the optical axis. [0003] Traditional optical axis offset methods such as figure 1 As shown, it includes the front mirror group 1, the relay image transfer front group 2, the mirror 1 3, the mirror 2 4, the mirror 3 5, th...

AI Technical Summary

Problems solved by technology

This offset method takes up a lot of space, and the optical adjustment is complicated, which is not conducive to the secondary adjustment of the optical axis

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