Telephoto zoom lens with large aperture and large image surface

A zoom lens and image plane technology, applied in the lens field, can solve the problems of small light transmission and poor image quality

Pending Publication Date: 2018-04-24
DONGGUAN YUTONG OPTICAL TECH
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common telephoto zoom lens aperture is generally around F2.0, and the amount of light passing through is relatively small.
In low-light environments, infrared lights are usually used for supplementary light, but the overall image quality is relatively poor in environments where ultra-long-distance infrared lights cannot reach

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Telephoto zoom lens with large aperture and large image surface
  • Telephoto zoom lens with large aperture and large image surface
  • Telephoto zoom lens with large aperture and large image surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are only for reference and description, and do not constitute a limitation to the protection scope of the present invention.

[0024] Such as figure 1 and figure 2 As shown, a telephoto zoom lens with large aperture and large image surface includes a front fixed lens group with positive refractive power, a zoom lens group with negative refractive power, A rear fixed lens group with positive refractive power and a compensation lens group with positive refractive power, the zoom lens group and the compensation lens group satisfy the following conditional formula:

[0025] 0.5<∣Ff / Bf∣<3,

[0026] Wherein, Ff is the focal length of the compensation lens group, and Bf is the focal length of the zoom lens group.

[0027] As a further improvement of this embodiment, the front fixed lens group and the rear fixed lens group re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a telephoto zoom lens with a large aperture and a large image surface. The telephoto zoom lens comprises a front fixed lens group with positive focal power, a zoom lens group with negative focal power, a rear lens group with positive focal power and a compensating lens group with positive focal power that are sequentially arrayed along an optical axis from an object space toan image space, wherein the zoom lens group and the compensating lens group can meet the following conditional expression: 0.5<|Ff/Bf|<3, wherein Ff is the focal length of the compensating lens group; Bf is the focal length of the zoom lens group. The telephoto zoom lens is a telephoto zoom lens adopting 15 glass spherical lenses, the maximum aperture is F1.2, the maximum image surface is 1/1.7',the resolution ratio is eight-million pixels, the range of the focal length is 10-40vmm, and the total track length is less than 100 mm; in addition, the telephoto zoom lens has the advantages of being good in imaging quality, large in relative aperture, having constant aperture and the like.

Description

technical field [0001] The invention relates to the technical field of lenses, in particular to a telephoto zoom lens with a large aperture and a large image surface. Background technique [0002] Telephoto lenses have strong telephoto capabilities, so they are widely used in long-distance monitoring. Long-distance monitoring requires a large amount of light to ensure the brightness of the image, so the lens needs to have a large aperture. However, the current common telephoto zoom lens aperture is generally around F2.0, and the amount of light transmitted is relatively small. In low-light environments, infrared lights are usually used for supplementary light, but the overall image quality is relatively poor in environments where ultra-long-distance infrared lights cannot reach. Therefore, it is necessary to develop a telephoto zoom lens with a maximum image area of ​​more than 1 / 1.7" and a maximum aperture of F1.2 with a 1 / 1.7" high-sensitivity imaging chip. Clear and br...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/173
CPCG02B15/173
Inventor 张品光何剑炜刘官禄毛才荧
Owner DONGGUAN YUTONG OPTICAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap