Starlight level sighting object lens

A technology of super gun and objective lens, which is applied in the field of starlight level gun sight objective lens, can solve the problem that the relative aperture cannot meet the requirements of use, and achieve the effect of reducing spherical aberration and chromatic aberration, reducing chromatic aberration, and reducing spherical aberration

Inactive Publication Date: 2019-03-05
FUZHOU DEV ZONE HONGFA OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure that the overall magnification of the gun sight is certain, the objective lens of the gun sight generally has a longer focal length, but the relative aperture of the telephoto objective lens currently on the market cannot meet the requirements for use in low-light environments

Method used

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  • Starlight level sighting object lens
  • Starlight level sighting object lens
  • Starlight level sighting object lens

Examples

Experimental program
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Embodiment Construction

[0015] attached figure 1 The starlight-level gun sight objective shown in the figure, from the object side to the image side, sequentially includes a biconvex first lens L1 with positive diopter power, a biconcave second lens L2 with negative diopter power, and a meniscus third lens L3 with positive diopter power , the fourth biconvex lens L4 with positive power, the fifth biconvex lens L5 with positive power, the sixth biconcave lens L6 with negative power, and the seventh biconcave lens L7 with negative power. By distributing the focal power of the optical system reasonably, various optical aberrations such as spherical aberration and chromatic aberration are more evenly distributed among the lenses of the optical system and cancel each other out.

[0016] The focal lengths, refractive indices and Abbe coefficients of the seven optical lenses in this patented optical lens meet the following conditions:

[0017] 85

1.62

52.3

-98

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Abstract

The invention discloses a starlight level sighting object lens, and belongs to the field of light-mechanical-electric integration. The focal power of an optical system is distributed reasonable and glass of ultra-low dispersion is used, so that optical aberration mainly including spherical aberration and color aberration can be corrected effectively, the lens has a relatively long focal length, the relative aperture of the lens reaches F1.4, high-definition imaging can realized in day and low-illuminance conditions, the object lens can be applied to a sighting device with a starlight-level ultra-low-illuminance camera, and thus, the sighting device have good using effects in day and night.

Description

technical field [0001] This patent belongs to the field of optical-mechanical-electrical integration, and relates to a starlight-level gun sight objective lens, which is used in day and night gun sights or night vision devices, and is suitable for use in low-light environments. Background technique [0002] In recent years, with the advancement of image sensor technology and the improvement of image noise reduction algorithms, "star-level" cameras that can be applied to illuminance below 0.0001Lux have begun to appear. The price of the intensifier tube remains high, so the method of using a large relative aperture objective lens with a "starlight level" ultra-low illumination camera on the gun sight has become more and more widely used. [0003] In order to ensure a certain overall magnification of the rifle scope, the objective lens of the rifle scope generally has a longer focal length, but the relative aperture of the telephoto objective lens currently on the market canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/00
Inventor 陈金发连渊坡周明东
Owner FUZHOU DEV ZONE HONGFA OPTOELECTRONICS TECH
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