Underwater special imaging wide-angle lens

A wide-angle lens and imaging technology, applied in the field of optics, can solve problems such as limited applicable occasions, and achieve the effect of effective control, good imaging, and high degree of automation

Active Publication Date: 2017-02-15
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] The underwater imaging lens usually used can only monitor the moving target within a small field of view in real time or take small-angle shooting, and the applicable occasions are limited. For real-time monitoring of the launching motion state of an underwater high-speed moving target, a large field of view, large Relative aperture underwater dedicated imaging objective

Method used

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  • Underwater special imaging wide-angle lens
  • Underwater special imaging wide-angle lens
  • Underwater special imaging wide-angle lens

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Embodiment Construction

[0015] Such as figure 1 As shown, the underwater special imaging wide-angle lens of the present invention adopts a reflective telephoto structure, which is composed of a front negative group lens 1 and a rear positive group lens 2, and the optical window 3 is a concentric circular window made of quartz glass. This type of window Compared with the flat window, the field of view loss is smaller, the performance is reliable, and the pressure resistance is strong. Its disadvantage is that it has high requirements for processing and assembly technology, and high maintenance cost, so it has been widely used in related projects in the past. Practice shows that this kind of sealing window is reasonable and feasible.

[0016] figure 2 It is a structural diagram of the optical system, using 10 spherical mirrors located in the same optical path; the front negative lens group 1 includes an optical window 3, a first negative lens 4, a second negative lens 5, a first positive lens 6, and...

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Abstract

The invention provides a special underwater imaging wide-angle lens. The special underwater imaging wide-angle lens comprises a front negative group lens and a rear positive group lens positioned at the same optical path with the front negative group lens. Each of the front negative group lens and the rear positive group lens comprises at least four spherical mirrors positioned on the same optical path. The special underwater imaging wide-angle lens realizes the real-time monitoring and shooting of underwater shooting with a horizontal view field angel being larger than or equal to 75 degrees, a vertical view field angle being larger than or equal to 60 degrees and a diagonal view field angel being larger than or equal to 85.3 degrees.

Description

technical field [0001] The invention relates to the field of optics, in particular to a special wide-angle optical imaging system used in harsh underwater environments. Background technique [0002] With the continuous development of underwater detection technology, it is urgent to monitor the process of launching multiple targets from multiple angles and large field of view, so as to further understand the movement of moving targets during launching and understand the changes in the surrounding environment of moving targets. [0003] The underwater imaging lens usually used can only monitor the moving target within a small field of view in real time or take small-angle shooting, and the applicable occasions are limited. For real-time monitoring of the launching motion state of an underwater high-speed moving target, a large field of view, large Relative aperture underwater dedicated imaging objective. Contents of the invention [0004] In order to solve the technical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06
Inventor 刘西站何俊华薛艳博王维
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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