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Off-axis blocking-free parallel light system capable of eliminating six types of aberrations

A parallel light and non-occlusion technology, applied in the field of optics, can solve problems such as the center of the rotationally symmetric system being obstructed and unusable, achieving the effect of solving the obscuration problem, eliminating aberrations, and broadening the field of use

Inactive Publication Date: 2014-06-18
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] Although the reflective collimated light system can eliminate chromatic aberration, there is central occlusion in the rotationally symmetric system, which cannot be used in some measurement systems

Method used

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  • Off-axis blocking-free parallel light system capable of eliminating six types of aberrations
  • Off-axis blocking-free parallel light system capable of eliminating six types of aberrations
  • Off-axis blocking-free parallel light system capable of eliminating six types of aberrations

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Embodiment Construction

[0022] There are seven kinds of optical aberrations, of which there are five kinds of monochromatic aberrations, spherical aberration, coma, astigmatism, field curvature and distortion, and the three-level aberration coefficients are respectively expressed as S 1 , S 2 , S 3 , S 4 and S 5 , there are two kinds of chromatic aberration, and the three-level aberration coefficients are respectively expressed as C1 and C2. The expression of each coefficient given by the three-level aberration theory is:

[0023] S 1 = ∑ hP + ∑ h 4 K

[0024] S 2 = ∑ yP - J ∑ W + ∑ h 2 yK

[0025] S 3 ...

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Abstract

The invention relates to an off-axis blocking-free parallel light system capable of eliminating six types of aberrations. The off-axis blocking-free parallel light system capable of eliminating six types of aberrations comprises a first reflecting mirror and a second reflecting mirror, the second reflecting mirror is arranged on a reflected light path after reflection of the first reflecting mirror; the first reflecting mirror is arranged on an incident light path; the first reflecting mirror and the second reflecting mirror are paraboloidal reflecting mirrors. The off-axis blocking-free parallel light system capable of eliminating six types of aberrations can be used for a beam expander system or a beam shrinking system or a telescopic system and is capable of simultaneously eliminating six types of aberrations.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a parallel light system, in particular to an off-axis unobstructed parallel light system capable of eliminating six kinds of aberrations. Background technique [0002] Parallel light systems are widely used in the field of optics, such as optical beam expanders, optical beam shrinkers, or telephoto systems. They can be classified into transmission and reflection parallel light systems and reflective parallel light systems. . [0003] (1) Transmissive parallel light system [0004] Although the transmissive parallel optical system can theoretically eliminate seven kinds of optical aberrations (spherical aberration, coma, astigmatism, field curvature, distortion, axial chromatic aberration and vertical axis chromatic aberration), if the wavelength span of each band is large (such as in ultraviolet bands, visible bands and infrared bands at the same time), the transmissive collimated light sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/30G02B27/00G02B5/10
Inventor 李红光董晓娜达争尚郑小霞张磊孙策
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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