Large-target-surface high-definition lens with laser interference resistance
A technology with a large target surface and anti-laser, which is applied in optics, optical components, instruments, etc., can solve the problems of changing the surface accuracy of optical surfaces, reducing imaging quality, and interfering with normal work, achieving compact structure, high image restoration, and The effect of a single frame rate with a large amount of information
Active Publication Date: 2020-12-18
FUJIAN FORECAM OPTICS CO LTD
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Problems solved by technology
However, the reflected laser energy may also interfere with the normal operation of other systems and cannot fundamentally solve the problem
In addition, multi-layer coating may change the surface accuracy of the optical surface and reduce the imaging quality, especially for lenses with relatively large geometric dimensions, which is more difficult to control
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[0016] Such as Figure 1~4 As shown, a high-definition lens with a large target surface and anti-laser interference capability, the optical system of the lens includes a front group A with a positive focal power and a middle group with a negative focal power arranged in sequence along the incident optical path from front to back. Group B and reflector C, the rear of reflector C is provided with extinction cylinder D, and the reflective light path of reflector C is provided with biconvex lens E; The front group A is sequentially provided with negative meniscus lens A-1 and biconvex lens A-1 along the incident light path The first cemented group of convex lens A-2 closely connected, the positive meniscus lens A-3, the second cemented group of negative meniscus lens A-4 and positive meniscus lens A-5 closely connected; the middle group B is sequentially along the incident light path There is a third cemented group in which biconvex lens B-1 and biconcave lens B-2 are in close con...
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The invention relates to a large-target-surface high-definition lens with laser interference resistance, an optical system of the lens comprises a front group A with positive focal power, a middle group B with negative focal power and a reflector C, an extinction cylinder D is arranged behind the reflector C, and a biconvex lens E is arranged on a reflection light path of the reflector C; the front group A is sequentially provided with a first gluing group formed by tightly connecting a negative meniscus lens A1 and a biconvex lens A2, a positive meniscus lens A3 and a second gluing group formed by tightly connecting a negative meniscus lens A4 and a positive meniscus lens A5 along an incident light path; and the middle group B is sequentially provided with a third gluing group formed by tightly connecting a biconvex lens B1 and a biconcave lens B2 and a fourth gluing group formed by tightly connecting a biconcave lens B3 and a positive meniscus lens B4 along an incident light path. The lens provided by the invention utilizes reflection to reduce laser interference, has the advantages of a telephoto structure, is compact in structure, high in resolution, high in image restoration degree and large in single-frame-frequency information amount, and can be matched with a high-definition camera with twenty five million pixels.
Description
technical field [0001] The invention relates to a high-definition lens with a large target surface and anti-laser interference capability. Background technique [0002] In the field of industrial photography, it is not only required to have a high degree of image restoration and a large amount of information at a single frame rate, but also in recent years has put forward the requirement of anti-light energy interference in non-working bands. Especially in the multi-spectral system, due to the multi-band cooperative work, there is strong stray light interference in the monitoring field of view. For example, when the visible light and the laser band system work together, due to the high energy density of the laser, scattering occurs in the atmosphere, and the echo phenomenon will be detected in the visible light imaging system, forming high-brightness stray light spots, which interfere with the normal operation of the system Strong, and even lead to the failure of work tasks...
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IPC IPC(8): G02B13/00
CPCG02B13/006G02B13/0065
Inventor 屈立辉肖维军王芬魏岩丽
Owner FUJIAN FORECAM OPTICS CO LTD