Wide-width off-axis three-reflection-mirror optical system adopting free curved surface

An off-axis three-mirror and optical system technology, applied in the field of optics, can solve problems such as free-form surface asymmetry and difficult optical elements, achieve a large rectangular field of view, mature detection technology, and reduce manufacturing difficulty

Inactive Publication Date: 2013-08-14
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

Although the system uses only one free-form surface, the free-form surface is completely asymmetrical, and it is very difficult to manufacture completely asymmetrical optical components

Method used

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  • Wide-width off-axis three-reflection-mirror optical system adopting free curved surface
  • Wide-width off-axis three-reflection-mirror optical system adopting free curved surface
  • Wide-width off-axis three-reflection-mirror optical system adopting free curved surface

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Embodiment Construction

[0011] The invention according to figure 2 The structure shown is implemented. In the figure, 8 is the main reflector, 9 is the secondary reflector, 10 is the third reflector, 11 is the image plane, 12 is the aperture stop, 13 is the reference axis, 14 is the incident light, the main reflector 8 and the third The solid line parts of the mirrors 10 indicate their respective effective apertures. A is the vertex of the main reflector 8, B is the vertex of the secondary reflector 9, C is the vertex of the third reflector 10, D is the center point of the image plane 11, L1 is the vertex A of the main reflector 8 to the secondary reflector 9, L2 is the axial distance from the vertex B of the secondary reflector 9 to the vertex C of the third reflector 10, and L3 is the distance between the vertex C of the third reflector 10 and the center D of the image plane 11 Axial distances, D1, D2, D3 are respectively the distances in the y direction from the vertex A of the main reflector 8...

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Abstract

The invention discloses a wide-width off-axis three-reflection-mirror optical system adopting a free curved surface, and belongs to the technical field of optics. A conventional off-axis three-reflection optical system adopting a free curved surface has a small field angle, and the adopted totally unbalanced free curved surface has large processing difficulty. The system is a wide-width off-axis three-reflection mirror optical system taking a primary reflection mirror as a free curved surface, and comprises the primary reflection mirror, a secondary reflection mirror, a third reflection mirror and a aperture diaphragm, wherein the aperture diaphragm is overlapped with the secondary reflection mirror; incident light is reflected to the secondary reflection mirror through the main reflection mirror, reflected to the third reflection mirror through the secondary reflection mirror, and then reflected through the third reflection mirror, so that an image is formed; the main reflection mirror is a free curved surface which is symmetrical to a meridian plane, so that the manufacturing difficulty of the system can be reduced; and at the same time, the system has a lager rectangular view field, so that wide-width imaging can be realized.

Description

technical field [0001] The invention belongs to the field of optical technology and relates to a wide-width off-axis three-mirror optical system using a free-form surface. Background technique [0002] The traditional large field of view off-axis three-mirror optical system is generally a long line field of view system, that is, the sagittal field of view is larger, and the meridional field of view is smaller, and a large field of view can only be obtained in one direction. With the continuous development of science and technology, it is required that the off-axis three-mirror optical system can realize large field of view and wide-frame imaging. [0003] In recent years, the processing and testing technology of optical free-form surfaces has developed rapidly, making it possible for optical designers to use free-form surfaces in optical system design. The free-form surface optical element can no longer have a rotationally symmetric structure, which increases the degree of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06G02B27/00
Inventor 崔庆丰朱浩杨亮亮
Owner CHANGCHUN UNIV OF SCI & TECH
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