Common-path flexible off-axis four-mirror zoom optical system

An optical system and zoom technology, which is applied in the field of aerospace optical remote sensors to achieve the effect of light weight, high magnification and fine resolution

Inactive Publication Date: 2020-04-10
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the technical bottleneck of the existing space remote sensing camera for earth observation, the present invention provides a common optical path flexible off-axis four-reverse zoom optical system

Method used

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  • Common-path flexible off-axis four-mirror zoom optical system
  • Common-path flexible off-axis four-mirror zoom optical system
  • Common-path flexible off-axis four-mirror zoom optical system

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specific Embodiment approach 1

[0018] Specific implementation mode 1. Combination Figure 1 to Figure 5 In this embodiment, a common optical path flexible off-axis four-reflection zoom optical system includes a primary mirror 1 , a secondary mirror 2 , a third mirror 3 and a quadruple mirror 4 . Non-local optical system of primary mirror 1, secondary mirror 2, triple mirror 3 and quad mirror 4. The system also includes an entrance pupil and an exit pupil. The primary mirror 1 comprises a central axis defining the optical axis of the system. The primary mirror 1 is fixed or stationary positioned relative to the optical axis. The aperture stop is located on the primary mirror, and the light passes through the primary mirror 1, the secondary mirror 2, the third mirror 3, and the fourth mirror 4 in sequence, and is finally imaged on the image plane 5. Imaging optics are usually placed behind the exit pupil to provide the final imaging plane.

[0019] The secondary mirror 2 is a flexible deformable mirror, a...

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Abstract

A common-path flexible off-axis four-mirror zoom optical system relates to the technical field of aerospace optical remote sensors, solves the technical bottleneck of earth observation of an existingspace remote sensing camera, and comprises a primary mirror, a secondary mirror, a third mirror and a fourth mirror, wherein the primary mirror serves as a fixed mirror and is fixed relative to the optical axis of the system; the secondary mirror, the third mirror and the fourth mirror are a total-reflection zoom system composed of three movable mirrors; the secondary mirror is a negative power mirror; the secondary mirror is moved to be located in the Cassegrain optical structure; the secondary mirror is a flexible deformable mirror, and the vertex of the secondary mirror moves along the optical axis direction of the system; the third mirror and the fourth mirror are both positive power mirrors, and the vertexes of the third mirror and the fourth mirror move along the optical axis of thesystem; and light sequentially passes through the primary mirror, the secondary mirror, the third mirror and the fourth mirror and is finally imaged on the image plane of a detector. The total-reflection zoom system provided by the invention realizes light path sharing, and the aberration of the system is corrected by combining the flexible deformable mirror, so that the ultra-light weight of themulti-channel optical system is realized.

Description

technical field [0001] The invention relates to the technical field of aerospace optical remote sensors, in particular to a common optical path flexible off-axis four-reverse zoom optical system, and the invention is suitable for space remote sensing cameras with variable focus for earth observation. Background technique [0002] According to statistics released by CEOS, since August 18, 1980, when the United States launched the world's first space camera, a total of more than 300 earth observation satellites have been launched into orbit. After decades of development, from the initial film recovery method to the current on-orbit real-time transmission, the resolution has gradually increased from tens of meters to the current more than ten centimeters, and a series of satisfactory results have been achieved. Space cameras are an important tool for humans to carry out earth exploration, and have been widely used in the observation of ground targets such as oceans, land, and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06G02B17/02G02B15/04G02B26/00
CPCG02B15/04G02B17/023G02B17/0663G02B26/00
Inventor 金光岳炜徐伟李宗轩杨秀彬陈高杰
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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