Inner Focusing Athermalized Longwave Infrared Continuous Zoom Lens for Hermetic Installations

A long-wave infrared and zoom lens technology, applied in optical components, instruments, optics, etc., can solve the problems of design difficulty and limited infrared optical materials

Active Publication Date: 2019-06-04
HEBEI HANGUANG HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the infrared continuous zoom system is more difficult to design, especially the infrared continuous zoom system with high pixels, large target area, and large focal length, because the optional infrared optical materials are limited

Method used

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  • Inner Focusing Athermalized Longwave Infrared Continuous Zoom Lens for Hermetic Installations
  • Inner Focusing Athermalized Longwave Infrared Continuous Zoom Lens for Hermetic Installations
  • Inner Focusing Athermalized Longwave Infrared Continuous Zoom Lens for Hermetic Installations

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Embodiment Construction

[0018] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] as attached figure 1 As shown, the present invention includes a front fixed group G1 with positive refractive power, a zoom group G2 with negative refractive power, a compensation group G3 with negative refractive power, a diaphragm STO, Rear fixation group G4 with positive optical power, protective glass PG and image plane Simage.

[0020] The realization of the inner-focusing athermalized long-wave infrared continuous zoom lens suitable for sealing devices needs to meet two conditions: (1) continuous change of focal length or magnification; (2) stable image plane position during zooming. These two conditions are realized by the movement of the zoom group and the compensation group. In order to achieve the purpose of zooming, the zooming group moves linearly along the axis. At this time, the vertical magnification changes and the image point move...

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Abstract

The invention discloses an inner focusing type athermalization long wave infrared continuous zooming camera lens suitable for a sealing device. A front fixing group G1 with focal power as positive, a zooming group G2 with focal power as negative, a diaphragm STO, a middle fixing group G3 with focal power as negative, a compensating group G4 with focal power as positive, a back fixing group G5 with focal power as negative and an image plane which are successively arranged from an object direction to an image direction, wherein the zooming group G2 and the compensating group G4 move back and forth along an optical axis to realize continuous zooming imaging of the camera lens. The inner focusing type athermalization long wave infrared continuous zooming camera lens is characterized by high pixel, a large target surface and a large focal length; a first lens of the back fixing group can move back and forth along the axis to compensate drift of the image plane along temperature. The inner focusing type athermalization long wave infrared continuous zooming camera lens suitable for the sealing device realizes athermalization of a camera lens and has a focusing effect, can be installed in photoelectric products, pods and the like and can realize sealing performance of the products without protection windows.

Description

technical field [0001] The invention belongs to the technical field of short-wave infrared imaging, and specifically relates to an inner-focusing athermal long-wave infrared continuous zoom lens suitable for a sealing device, and is suitable for a long-wave uncooled detector with high pixels and a large target surface. Background technique [0002] Infrared optical system is widely used in military field and civil engineering because of its good concealment, good environmental adaptability and many other advantages. In particular, the infrared continuous zoom system can change the imaging size by changing the focal length of the system, so as to achieve the purpose of searching in a large field of view and carefully observing the target in a small field of view, and it is not easy to lose the target when the field of view changes. It has a good application prospect in the civilian and military fields . However, the infrared continuous zoom system is more difficult to design...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173G02B15/15
CPCG02B15/15G02B15/173
Inventor 李晓雷赵翠玲
Owner HEBEI HANGUANG HEAVY IND
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