Reflex type telephoto objective lens

A catadioptric and objective lens technology, applied in optical components, optics, instruments, etc., can solve the problems of difficulty in meeting the requirements of long focal length and light and small size at the same time, the large size of the three-mirror off-axis structure, and the difficulty of system assembly and adjustment. Avoid secondary spectral problems, simple processing, and the effect of shortening the overall length

Active Publication Date: 2015-01-28
SUZHOU UNIV
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AI Technical Summary

Problems solved by technology

The three-reverse off-axis structure has a large size in the off-axis direction, and the installation and adjustment of the system is difficult, and the development cost is high and the cycle is long
It is difficult for the above methods to meet the requirements of long focal length and small size at the same time

Method used

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  • Reflex type telephoto objective lens
  • Reflex type telephoto objective lens
  • Reflex type telephoto objective lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The technical solution of this embodiment is to provide a compact catadioptric telephoto objective lens, whose design parameters are: the focal length is 3000mm, the full field of view is 1.2°, the F number is 10, and the working band is 0.45 ~0.75 .

[0020] See attached figure 1 , which is a structural schematic diagram of the optical lens described in this embodiment. Depend on figure 1 It can be seen that its optical system includes a positive power lens group in the front group and a negative power lens group in the rear group. The positive power lens group in the front group is a two-piece reflector structure, and the negative power lens group in the rear group The mirror group is a three-piece separated lens structure; along the incident direction of the optical path, the positive power lens group is the primary mirror 1, which is the first reflector along the incident direction of the optical path, and the secondary mirror 2, which is the second reflecting ...

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Abstract

The invention discloses a reflex type telephoto objective lens. According to the light ray passing sequence, an optical system of the reflex type telephoto objective lens comprises a front positive focal power mirror set and a rear negative focal power mirror set; the focal power of the positive focal power mirror set is 1 / 3-2 / 3 of the total focal power of the optical system, the positive focal power mirror set comprises a primary reflecting mirror and a secondary reflecting mirror, and a diaphragm is located on the primary reflecting mirror; the primary reflecting mirror is a concave aspherical mirror, and the secondary reflecting mirror is a high-order convex aspherical mirror; the negative focal power mirror set is composed of three lenses made of the same optical material, and the lenses are the positive meniscus lens bent towards an image plane, the biconcave negative lens and the plano-convex positive lens in sequence. The reflex type telephoto objective lens has the advantages of being long in focal length, large in aperture, small in blocking area, simple and compact in structure, wide in applicable waveband, small in chromatic aberration, good in imaging quality, capable of allowing image space to approximate a telecentric position, and easy to process, assemble and adjust.

Description

technical field [0001] The invention relates to a catadioptric telephoto objective lens. Background technique [0002] The purpose of space optical camera is to obtain relevant information of ground targets from space. The information obtained by it can be widely used in many fields such as earth resource exploration, environmental detection, topographic mapping, etc. All advanced countries in the world attach great importance to the high-performance space optical camera. develop. [0003] Three-mirror and two-mirror structures are widely used in space long focal length optical cameras. The image of the coaxial three-mirror structure is on the same side, and the image plane needs to be obtained by the detector after the optical path is bent. The three-rotational off-axis structure has a large size in the off-axis direction, and the installation and adjustment of the system is difficult, and the development cost is high and the cycle is long. It is reported in the literatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/02
CPCG02B13/0065G02B13/02G02B13/22
Inventor 孙雯沈为民赵知诚胡建军
Owner SUZHOU UNIV
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