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A medium-wave infrared continuous zoom lens and imaging device

A zoom lens and zoom lens technology, applied in optical components, instruments, optics, etc., can solve problems such as difficult installation and adjustment, complex optical system structure, and high control precision requirements, and achieve good imaging quality, short zoom stroke, and compact structure Effect

Active Publication Date: 2021-09-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the system uses a three-component zoom method, the optical system has a complex structure and requires high control precision, and its first compensation lens 3 is processed with an aspheric surface on the single crystal silicon material, which increases the difficulty of optical processing.
[0005] To sum up, the three-component compact zoom lens has problems such as complex structure and difficult assembly and adjustment; the aspheric surface on the single crystal silicon material increases the difficulty of optical processing

Method used

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  • A medium-wave infrared continuous zoom lens and imaging device
  • A medium-wave infrared continuous zoom lens and imaging device
  • A medium-wave infrared continuous zoom lens and imaging device

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] figure 1 It is a schematic diagram of the telephoto optical path of the mid-wave infrared continuous zoom lens according to the embodiment of the present invention. figure 2 It is a schematic diagram of the mid-focus optical path of the mid-wave infrared continuous zoom lens according to the embodiment of the present invention. image 3 It is a schematic diagram of the short-focus optical path of the mid-wave infrared continuous zoom l...

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Abstract

The invention discloses a medium-wave infrared continuous zoom lens, in which a front fixed group, a zoom lens group, a compensation lens group, a rear fixed group and a secondary imaging lens group are arranged coaxially from the object side to the image side, and the front The fixed group has positive refractive power, the zoom lens group has negative refractive power, the compensation lens group has positive refractive power, the rear fixed group has positive refractive power, and the secondary imaging lens group has positive refractive power, The zoom lens group and the compensation lens group can move axially to realize continuous zooming. The mid-wave infrared continuous zoom lens has a compact structure and meets the cold aperture efficiency of 100%; the axial movement of the zoom lens group and the compensation lens group realizes the continuous zoom of the system, the zoom stroke is short and the curve is smooth, and the zoom lens can be used in the full focal range It has good image quality.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a mid-wave infrared continuous zoom lens and an imaging device. 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 and electronic technologies, to compensate the defocus caused by temperature changes, so that The infrared optical system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173
CPCG02B15/173
Inventor 张新刘涛王灵杰史广维张建萍
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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