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Full-color 4K ultra-high-definition zoom optical system

An optical system, ultra-high technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems that the camera cannot image clearly, lose color information, etc., and achieve the effect of strong optical performance stability and light system quality

Active Publication Date: 2022-04-15
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Video surveillance is the most important means of prevention in the security system. Its importance is self-evident. With people's demand for security surveillance, all-weather surveillance has emerged as the times require. Cameras with ordinary aperture lenses cannot image clearly in the dark environment. Under the irradiation of infrared fill light, clear images can be obtained under low illumination, but only black and white images can be formed, and important color information is lost

Method used

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  • Full-color 4K ultra-high-definition zoom optical system
  • Full-color 4K ultra-high-definition zoom optical system
  • Full-color 4K ultra-high-definition zoom optical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, in the above-mentioned fixed group A, lens A2 and lens A3 are both ultra-low dispersion glass; in the zoom group B, lens B2 and lens B3 are both plastic aspherical surfaces; in fixed group C, lens C2 is glass aspheric surface ; In compensation group D, lens D4 and lens D5 are both plastic aspherical surfaces.

[0055] The technical indicators achieved by the above optical system are as follows:

[0056] (1) Aperture: F1.0 at the wide-angle end, F1.08 at the telephoto end;

[0057] (2) Imaging quality: MTF>0.2@250lp / mm at full focal length;

[0058]The specific parameters used in the optical system are as follows:

[0059]

[0060]

[0061] The aspheric coefficients of each aspheric lens are as follows:

[0062] .

Embodiment 2

[0063] Embodiment 2, in the above-mentioned fixed group A, lens A2 and lens A3 both use ultra-low dispersion glass; in the zoom group B, lens B2 and lens B3 use plastic aspheric surfaces; in fixed group C, lens C2 uses glass aspherical surfaces; In compensation group D, lens D4, lens D5 and lens D6 adopt plastic aspheric surfaces;

[0064] The technical indicators achieved by the optical system are as follows:

[0065] (1) Aperture: wide-angle end F1.01;

[0066] Telephoto end F1.06;

[0067] (2) Imaging quality: MTF>0.25@250lp / mm at full focal length;

[0068] The parameters used in the optical system are as follows:

[0069]

[0070] The aspheric coefficients of each aspheric lens are as follows:

[0071]

[0072] The expression of the above aspheric surface equation is:

[0073]

[0074] Among them, Z is the sagittal height from the apex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of...

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Abstract

The invention relates to a full-color 4k ultra-high-definition zoom optical system. The optical system is sequentially provided with a fixed group A with positive focal power, a zoom group B with negative focal power, a fixed group C with positive focal power and a compensation group D with positive focal power from an object plane to an image plane, the fixed group A comprises a lens A1, a lens A2 and a lens A3 which are arranged in sequence, the zoom group B comprises a lens B1, a lens B2 and a lens B3 which are arranged in sequence, the fixed group C comprises a lens C1, a lens C2 and a lens C3 which are arranged in sequence, and the compensation group D comprises a lens D1, a lens D2, a lens D3, a lens D4 and a lens D5. According to the invention, the glass-plastic structure design is adopted, so that compared with an all-glass system, the system mass is lighter, and compared with an all-plastic system, the optical performance stability is stronger. An F1.0 ultra-large aperture design is adopted, the aperture difference of a full-focal-length section does not exceed 0.1, and day and night full color and 4k ultra-high definition are realized in the full-focal-length section.

Description

Technical field: [0001] The invention relates to a full-color 4K ultra-high-definition zoom optical system, which belongs to the field of optoelectronic technology. Background technique: [0002] Video surveillance is the most important means of prevention in the security system. Its importance is self-evident. With people's demand for security surveillance, all-weather surveillance has emerged as the times require. Cameras with ordinary aperture lenses cannot image clearly in the dark environment. Under the irradiation of infrared fill light, clear images can be obtained under low illumination, but only black and white images can be formed, and important color information is lost. Invention content: [0003] The purpose of the present invention is to provide a full-color 4k ultra-high-definition zoom optical system. The full-color 4k ultra-high-definition zoom optical system has a reasonable design and can realize full-color 4k ultra-high-definition images at full focal l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B15/15G02B1/00G02B1/04
CPCG02B15/144113G02B15/15G02B1/00G02B1/041
Inventor 康哲恺张世忠肖维军石姣姣
Owner FUJIAN FORECAM OPTICS CO LTD
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