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Refraction-reflection type imaging spectrometer optical system based on prism-grating-prism decomposition

An imaging spectrometer and prism splitting technology, which is applied in the field of systems and optical components, can solve problems such as difficult to obtain volume phase gratings, and achieve the effects of improving optical efficiency, compact system structure, and easy large object numerical aperture

Active Publication Date: 2012-06-20
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Limited by the substrate material and process, it is not easy to obtain a volume phase grating with a wide spectrum and a low number of lines

Method used

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  • Refraction-reflection type imaging spectrometer optical system based on prism-grating-prism decomposition
  • Refraction-reflection type imaging spectrometer optical system based on prism-grating-prism decomposition
  • Refraction-reflection type imaging spectrometer optical system based on prism-grating-prism decomposition

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Embodiment Construction

[0023] according to figure 1 Schematic diagram of the structure, a catadioptric spectrometer optical system with prism-grating-prism splitting is designed, the imaging quality is close to the diffraction limit, and the spectrum curvature is low. The optical system indicators are listed in Table 1, and the specific design parameters of the optical system are listed in Table 2.

[0024] Table 1

[0025]

[0026]

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Abstract

The invention discloses a refraction-reflection type imaging spectrometer optical system based on a prism-grating-prism decomposition, which is characterized by comprising a field stop, a collimate mirror, a plane mirror, a decomposition assembly, a convergent mirror group and a optical filter which are arranged sequentially from an object to an image. The optical system is in refraction-reflection type, the collimate mirror is a concave spherical reflector, the convergent mirror group is a spherical lens group, the decomposition assembly is of a prism-grating-prism form, a prism and a grating are combined for correcting spectrum curvature of the decomposition assembly, the grating is a reflection type plane grating, and an angle is formed between the convergent mirror group and the decomposition assembly in the optical axis direction and used for adjusting residual spectrum curvature of the optical system. The refraction-reflection type imaging spectrometer optical system based on the prism-grating-prism decomposition has the advantages of low spectrum curvature, high optical efficiency, compact structure, simply processing and installing and adjusting procedures and flexibility in selecting spectrum segments.

Description

technical field [0001] The invention relates to optical elements and systems, in particular to a catadioptric imaging spectrometer optical system based on prism-grating-prism light splitting. Background technique [0002] The imaging spectrometer is an instrument used to obtain two-dimensional spatial information and spectral information of the target. It obtains the spectral image of the target with high spectral resolution, and is used to detect and identify the target and analyze the material composition. It is widely used in national production, military and scientific research. It is widely used in research and other fields. [0003] Dispersion-type spectral imaging systems generally have structures such as Offner, Dyson, PGP, prism, and planar grating. The Offner and Dyson structure slits have very small bends and are very good choices for spectral imaging systems, but the manufacturing cost of curved gratings is high. The PGP structure is a combination of prisms and...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/18G02B17/08
Inventor 袁立银何志平舒嵘王建宇
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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