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Infrared two-way zoom area array scanning optical system

An optical system and focal plane technology, applied in the field of infrared optical system with two-speed zoom area array scanning, can solve the problems that the target resolution cannot be changed, cannot take into account large field of view search and small field of view detailed inspection, etc., and achieve wide working temperature Range, clear imaging effect

Active Publication Date: 2019-08-13
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

During its 360° scan search and gaze tracking, the resolution of the target cannot be changed, and it cannot take into account the functions of large field of view search and small field of view detailed inspection

Method used

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  • Infrared two-way zoom area array scanning optical system
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  • Infrared two-way zoom area array scanning optical system

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Embodiment Construction

[0047] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0048] According to attached figure 1 As shown in the schematic diagram of the present invention, the infrared two-stage area array scanning optical system of the present invention has a zoom ratio of 1≤Γ≤3; the F number range of the infrared system is: 2.0≤F / #≤5.5; The 73mm / 180mm infrared two-speed zoom area scan optical system is an example for description.

[0049] The infrared two-speed zoom area scan optical system is equipped with a cooling infrared detector. The detector array is 640×512; the pixel size is 15 μm; the short focal length of the focal length system is f 1 =73mm, telephoto focal length is f 2 =180mm, the zoom ratio of the system is: Γ=f 2 / f 1 =2.47; the corresponding optical field of view coverage ranges from 7.5°×6.0° to 3.1°×2.4°, and the F-number is constant at 2 throughout the zoom range. The optical system adopts the structural form...

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Abstract

The invention discloses an infrared two-way zoom area array scanning optical system. The system comprises: a front fixed group, a zoom group, a rear fixed group, a galvanometer, a secondary convergence group, a turning reflecting mirror, a thrice imaging group, a window and an aperture diaphragm from object surface to image surface. The system has the advantages that the zoom group is moved alongthe direction of the optical axis to realize two-way zoom; the distance of the zoom group along the direction of the optical axis is finely adjusted to simultaneously realize the compensation of different working temperatures and the clear imaging of different object distances; through the reciprocating scanning of the galvanometer at a specific frequency in a corresponding angular range, the movement of the object surface within the exposure time, caused by the rotation of the scanning platform, can be compensated and the imaging is kept clear and stable during the rotation scanning without trailing smears; the zoom form of the system is simple and two-way zoom area array scanning, two-way gaze tracking, compensation of the working temperature of 30 DEG C below zero-60DE G C and focusingof different distance imaging can be realized through the movement of a group of optical components; and the system can be applied to infrared systems of integrating medium-wave and long-wave two-wayzoom searching and tracking.

Description

technical field [0001] The invention relates to an infrared detection optical system, in particular to an infrared optical system with two-speed zoom area array scanning. Background technique [0002] The infrared search and track system is an imaging detection device that works in a passive way, which can complete the search, tracking and positioning of the target. This advantage has been widely concerned and applied. [0003] The second-generation infrared warning system uses infrared array detectors to scan and image at a speed of about 1 Hz. The warning system only has the function of scanning and imaging, and cannot track the target after it is found. With the application requirements of the integration of search and tracking, a continuous scanning area array detector imaging system has been developed. The scanning of the continuous scanning area array imaging system within the integration time will cause relative motion between the focal plane and the scene, resulti...

Claims

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Application Information

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IPC IPC(8): G02B15/167G02B26/10G02B27/00
CPCG02B15/167G02B26/105G02B27/0031
Inventor 丁学专周潘伟王世勇于洋李范鸣
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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