Double-field-of-view long-wave infrared optics passive athermalization optical system

An infrared optics and optical system technology, applied in the field of long-wave infrared optical systems, can solve the problems of reduced reliability and heavy system, and achieve the effects of small centroid change, high lens utilization rate and compact structure

Inactive Publication Date: 2014-03-26
SOUTH WEST INST OF TECHN PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The system is bulky and less reliable

Method used

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  • Double-field-of-view long-wave infrared optics passive athermalization optical system
  • Double-field-of-view long-wave infrared optics passive athermalization optical system
  • Double-field-of-view long-wave infrared optics passive athermalization optical system

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Embodiment Construction

[0020] In order to further clearly illustrate the present invention, specific embodiments will be provided below and combined with the accompanying drawings to describe the technical solution, but they should not be construed as limiting the present invention.

[0021] refer to figure 1 , figure 2 . In the embodiment described below, the dual-field long-wave infrared optical passive adiabatic optical system includes: a front fixed group lens, a zoom mirror negative lens 6 and a rear fixed group lens arranged in sequence from the object plane 9 to the focal plane 1 . The front fixed group consists of a positive lens 8 behind the object plane 9 and a convex negative lens 7 between the positive lens 8 and the negative lens 6 of the zoom mirror; the rear fixed group consists of a biconvex lens 5, a negative lens 4 close to the positive lens 5, Concave-convex lens 2 Convex lens 3 and lens 2 are composed of 4 lenses. The aperture stop of the optical system is located on the bico...

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Abstract

The invention provides a double-field-of-view long-wave infrared optics passive athermalization optical system. The double-field-of-view long-wave infrared optics passive athermalization optical system is an athermal double-field-of-view optical system which is high in utilization rate of lenses, has double fields of view, can automatically adapt to environmental temperature changes, and can achieve athermalization and achromatism. According to the technical scheme, a front fixing set is composed of a convex negative lens (7) which is arranged between a positive lens (8) and a zoom lens negative lens (6), and the positive lens; a rear fixing set is composed of a lens (5), a negative lens (4) close to the lens (5), a concave and convex surface lens (2) and a convex lens (3) close to the convex surface of the concave and convex surface lens (2). The zoom lens negative lens moves back and forth in the direction of an optical axis by using a motor as a driving source, the focal length of the zoom lens negative lens changes from 50mm to 150mm in a switching mode, and two-gear double-field-of-view zooming is achieved; when in a Long focal length state, an aperture diaphragm of the optical system is located on a biconvex lens; when in a short focal length state, the aperture diaphragm of the optical system is located on the positive lens; an integral imaging system is formed by the zoom lens negative lens, the front fixing set and the rear fixing set together.

Description

technical field [0001] The invention relates to an adiabatic dual-field optical system mainly used in the long-wave infrared band. Specifically, the present invention relates to a long-wave infrared optical system using double-field zoom and having an optical passive adiabatic function. Background technique [0002] When the optical instrument is used in a large temperature range, the thermal expansion and contraction of the lens barrel material, the optical material, and the temperature refractive index coefficient of the optical material will change the focal power of the lens, resulting in defocusing phenomenon, while the heat of the lens barrel material Expansion and contraction will also cause the optical system to defocus and degrade the image quality. In order to reduce the impact of temperature changes on the imaging quality of the infrared optical system, an athermal design, or athermal difference design, is required, that is, through certain mechanical, optical an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/16G02B13/14G02B13/18G02B7/02
Inventor 赵延邓键曲锐
Owner SOUTH WEST INST OF TECHN PHYSICS
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