Astigmatism-eliminating three-reflector optical system

An optical system and three-mirror technology, applied in the field of optical systems, can solve problems such as difficult installation and calibration, high processing difficulty, and high manufacturing cost, and achieve the effects of reducing difficulty and cost, reducing difficulty, and reducing difficulty

Inactive Publication Date: 2002-05-22
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the reflector of the system is an off-axis quadratic or high-order asphe

Method used

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  • Astigmatism-eliminating three-reflector optical system

Examples

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Embodiment 1

[0017] according to figure 1 As shown in the optical system structure, we have designed the optical system structure of a spaceborne telescope. The main technical indicators of the spaceborne telescope are:

[0018] Satellite orbit height: 686Km

[0019] Ground resolution: 4m

[0020] Spectral Range: Panchromatic

[0021] swath width: 24Km

[0022] Detector: 6000 yuan CCD linear array (unit size: 7μm×7μm)

[0023] The technical indicators of the optical system formulated by the overall technical indicators of the telescope are:

[0024] Focal length: 1200mm

[0025] Caliber: φ300mm

[0026] Wavelength: 0.5-0.8μm

[0027] Field of view: 2° (line field of view)

[0028] The design results of the specific optical structure parameters are attached, and the transfer function curve of the optical system is shown in figure 2 .

Embodiment 2

[0030] according to figure 1 As shown in the optical system structure, we have designed the optical system structure of a spaceborne telescope. The main technical indicators of the spaceborne telescope are:

[0031] Satellite orbit height: 600Km

[0032] Ground resolution: 4.5m

[0033] Spectral Range: Panchromatic

[0034] swath width: 27Km

[0035] Detector: 6000 yuan CCD linear array (unit size: 10μm×10μm) The technical indicators of the optical system formulated by the overall technical indicators of the telescope are:

[0036] Focal length: 1333.33mm

[0037] Caliber: φ300mm

[0038] Wavelength: 0.5-0.8μm

[0039] Field of view: 2.83° (line field of view)

[0040] The design results of the specific optical structure parameters are attached, and the optical transfer function curve of the optical system is shown in image 3 . Design results of optical structure parameters:

[0041] Example 1 Example 2 Main...

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Abstract

The anastigmatic three-reflector optical system includes main reflector, second reflector and third reflector. The second reflector is a phserical one, its optical axis is the optical axis of said optical system, and the optical axises of main reflector and third reflector and optical axis of said system are in same plane, and deviated from optical axis of the system, and have no any angular inclination with optical axis of system. The specular surfaces of the main reflector and third reflector are secondary ellipsoial surface respectively. Said invented system mainly is used as space telescopic optical system, also can be used in optical communication field.

Description

technical field [0001] The invention relates to an optical system, in particular to an astigmatism-eliminating three-mirror optical system, which is mainly used in space-to-earth observation telescopes and also in the field of optical communication. Background technique [0002] In the reflective telescope system, since there are only four free variables in the optical design of the two-mirror system, the contradiction between aberration correction and system outline size limits the design to a large extent. If the system is added with a reflector, the system The number of free variables in the design can be increased to seven, which greatly increases the possibility of system aberration elimination, which is why most space telescope systems with large fields of view and large relative apertures use three-mirror optical structures. [0003] In U.S. Patent No. 4,131,485, Korsch provides a space telescope optical system structure of a coaxial astigmat...

Claims

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Application Information

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IPC IPC(8): G02B5/10G02B17/06G02B23/02
Inventor 沈蓓军刘宝丽汪骏发薛永祺
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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