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Annular aperture ultrathin optical imaging system

An optical imaging system, a ring-shaped technology, applied in optics, optical components, instruments, etc., can solve the problems of high cost, difficult to popularize and use on a large scale, and achieve the effect of high quality, compact structure and reduced manufacturing cost.

Inactive Publication Date: 2009-11-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the light propagation medium of the system is CaF 2 , the cost is high, and it is not easy to promote and use on a large scale

Method used

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  • Annular aperture ultrathin optical imaging system
  • Annular aperture ultrathin optical imaging system
  • Annular aperture ultrathin optical imaging system

Examples

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Embodiment 1

[0019] See attached figure 1 ,it is figure 1 It is a structural schematic diagram of an annular aperture ultra-thin optical imaging system (optical path) provided by an embodiment of the present invention. See attached figure 1 , the optical imaging system provided by this embodiment includes a flat lens and a compensator, and the light enters the system through the annular clear aperture 1 (1'). The front surface of the plate lens is a flat mirror 3 (3 '), 5 (5 '), 7 (7 ') and 9 (9 '), which are four superimposed flat mirrors; Four coaxial annular high-order aspheric mirrors on the same substrate, in order of 2(2'), 4(4'), 6(6') and 8(8'); between the front and rear surfaces of the flat lens , using air as the medium for light transmission. The compensator is located in the middle of the rear surface of the flat lens, and it is composed of three lenses, which are close to the rear surface of the flat lens, the first lens 10 with positive refractive power, the second lens ...

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Abstract

The invention discloses an annular aperture ultrathin optical imaging system which can be used for a portable small-scale camera, a mobile phone lens or other civil optical imaging systems. The annular aperture ultrathin optical imaging system comprises a flat lens and a compensator; and the clear aperture is annular. The front surface of the flat lens is a plane reflector, while the rear surface has four coaxial annular high-order aspheric reflectors on the same substrate; and air is adopted as a light transmission medium. The system can obviously reduce the size and the weight while keeping good imaging quality and provide an effective method for improving a conventional refraction system. Compared with a common small-scale lens, the lens has the characteristics of good imaging quality, large numerical aperture, simple assembly and adjustment, low cost, portability, easy processing, suitability for large-batch production and the like.

Description

technical field [0001] The invention relates to a micro-ultra-thin optical imaging system, in particular to an ultra-thin optical imaging system with multiple reflections in an annular aperture optical path, which can be used as a lens of a miniature camera. Background technique [0002] With the continuous development of ultra-thin lenses, the miniaturization of optical imaging systems such as cameras becomes possible. Various micro-lenses have become a hot spot of attention, and ultra-thin lenses will become an important branch of the future market. Although micro-lenses are very common, their resolution and light energy collection efficiency are relatively low. The thickness of the camera is mainly limited by the key factor of the lens structure. In order to reduce the size and thickness of the camera while maintaining relatively good image quality, it is necessary to improve the lens design. How to make the camera lens thinner and smaller has become the primary task of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/08G02B1/00G02B13/00
Inventor 沈为民张蕊蕊
Owner SUZHOU UNIV
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