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Long-wave infrared continuous zoom lens

A zoom lens and long-wave infrared technology, applied in the field of long-wave infrared continuous zoom lens, can solve the problems of limited detection distance, uncorrected chromatic aberration, unsuitable detector, etc., achieve good zoom effect, improve chromatic aberration, and reduce production costs Effect

Inactive Publication Date: 2010-01-06
北京波谱华光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system has the following problems: first, its chromatic aberration at the telephoto position has not been corrected, and the image quality is average; second, the system is not suitable for detectors with larger panel numbers; third, the telephoto focal length of the system is only 90mm, the effective detection distance is limited

Method used

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  • Long-wave infrared continuous zoom lens

Examples

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Embodiment Construction

[0032] Specific embodiments of the present invention are described below in conjunction with accompanying drawing:

[0033] figure 1 and figure 2 It is a schematic diagram of a zoom lens in an embodiment of the present invention at the tele-end (tele-end) and wide-angle end (wide-end), wherein figure 1 The upper part is a schematic diagram of the zoom lens at the telephoto end, while figure 1 The bottom half is a schematic diagram of the zoom lens at the wide-angle end. Please refer to figure 1 , the zoom lens 100 of this example includes a first lens group 110 with positive diopter and a second lens group 120 with negative diopter, a third lens group 130 with positive diopter, and a fourth lens group 140 with positive diopter . Wherein, the first lens group is a fixed group, including a first lens 112 with positive diopter, and the first lens 112 is a meniscus germanium lens with a convex surface facing the object side. In addition, the zoom lens 100 satisfies the foll...

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Abstract

The invention discloses a long-wave infrared continuous zoom lens comprising a first lens group with positive diopter, a second lens group with negative diopter, a third lens group with positive diopter and a fourth lens group with positive diopter, wherein the first lens group is a fixed group and is formed by a falcate germanium lens with a convex surface which faces to an object side, and a magnification group which can change a system focus is formed by the second lens group and the third lens group; wherein the second lens group comprises a plano-concave zinc selenide negative lens with a concave surface which faces to the object side and a concavoconcave germanium lens; the third lens group comprises a falcate germanium lens with a concave surface which faces to the object side; the fourth lens group is a focus group which comprises a falcate germanium lens with a concave surface which faces to the object side; the focus of the zoom lens is F, the focus of the first lens group is F1, and the F / F1 is larger than 0.25 and is smaller than 0.75. The long-wave infrared continuous zoom lens has simpler structure, is easy to manufacture and process and can effectively reduce production cost.

Description

technical field [0001] The invention relates to a long-wave infrared lens, in particular to a long-wave infrared continuous zoom lens for an uncooled detector. Background technique [0002] In recent years, the range of applications of infrared technology has flourished. Due to its advantages of low price, small size, light weight, low power consumption, and high reliability, uncooled detectors have been widely used in national defense, public security, industrial detection and other fields. In many special occasions, the infrared fixed-focus lens can no longer meet the needs. One of the core components of this imaging system is the infrared zoom lens, which realizes continuous zooming by moving different lens groups while maintaining a clear image plane. It can achieve the purpose of searching for targets with a large field of view, tracking targets during zooming, and carefully observing targets with a small field of view. It has a good application prospect in civilian a...

Claims

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Application Information

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IPC IPC(8): G02B15/16
Inventor 骆守俊张浩
Owner 北京波谱华光科技有限公司
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