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Over-sized image plane large relative aperture high-definition continuous zooming optical system

A technology of relative aperture and optical system, applied in the optical field, can solve the problem of the difficulty of aberration correction of the optical system, and achieve the effect of ensuring light weight and stability, simple zoom structure, and improved resolution

Active Publication Date: 2019-01-08
HEBEI HANGUANG HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of off-axis aberrations will bring great difficulty to the aberration correction of the optical system

Method used

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  • Over-sized image plane large relative aperture high-definition continuous zooming optical system
  • Over-sized image plane large relative aperture high-definition continuous zooming optical system
  • Over-sized image plane large relative aperture high-definition continuous zooming optical system

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with specific examples.

[0037] Such as figure 1 As shown, a high-definition continuous zoom optical system with a large image surface and a large relative aperture has four lens groups: a front lens group, a zoom lens group, a compensation lens group, and a rear lens group.

[0038] The front lens group consists of the first lens of the front lens group with negative power, the second lens of the front lens group with positive power, the third lens of the front lens group with positive power, and the first lens of the front lens group with positive power. Four lenses and a fifth lens in the front lens group with positive power. It is placed in the optical path from left to right along the direction of light propagation, and it has the function of converging the light emitted by distant objects into the optical system. During the zooming process, the front lens group remains stationary, bu...

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Abstract

The invention relates to an over-sized image plane large-aperture high-definition continuous zooming optical system, and belongs to the technical field of the optics. The system comprises a front lensassembly with focal power as positive, a zoom lens assembly with focal power as negative, a compensation lens assembly with the focal power as negative, a variable diaphragm and a back lens assemblywith focal power as positive. The system has the capacity of an over-sized image plane visible light detector with an adaptive diagonal length not greater than Phi30.2mm; the relative aperture can achieve F / 4 of a wide-angle end and F / 5 of a long-focus end; the focal distance can achieve 30mm-330mm. The problem that the inherent secondary spectrum aberration, the spherochromatic aberration and thehigh-level spherical aberration of the large relative aperture system are hard to correct is solved, and the resolution is effectively improved; a zooming structure of two-group element is simple, and the light weight and the stability of the whole lens are guaranteed from the optical system.

Description

technical field [0001] The invention relates to a zoom lens system, in particular to a high-definition continuous zoom optical system with a super-large image surface and a large relative aperture, which belongs to the field of optical technology. Background technique [0002] Continuous zoom lenses are widely used in border and sea defense monitoring, observation, and aiming equipment. It can not only use a large field of view to observe macro scenes as a whole, but also use a small field of view to observe distant details. The continuous zoom function allows users to observe details of objects at any distance. If a zoom optical system with both a large image surface and a large relative aperture can be designed to meet high-definition requirements, it can bring greater light flux and brighter relative illuminance, so that it can be achieved in cloudless It can be used in sunny weather and also in dark nights with only star-level lighting. [0003] In the prior art, as pr...

Claims

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Application Information

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IPC IPC(8): G02B15/17
CPCG02B15/17
Inventor 张溪
Owner HEBEI HANGUANG HEAVY IND
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