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Broad spectral band prepositive aperture telecentric optical system

A technology of telecentric optical system and front light, which is applied in the field of Fourier optical system to achieve the effect of guaranteed quality, low price and long working distance

Inactive Publication Date: 2009-06-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing optical system can have any two of these features for wide-spectrum automatic apochromatism, long working distance, and telecentric features of the front aperture, but there is no such feature yet.

Method used

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  • Broad spectral band prepositive aperture telecentric optical system
  • Broad spectral band prepositive aperture telecentric optical system
  • Broad spectral band prepositive aperture telecentric optical system

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Embodiment Construction

[0025] The invention is a telecentric optical system with wide-spectrum segment automatic correction of secondary spectrum, long working distance and front light hole. It can be used as an independent optical system, or as a Fourier lens in an interference imaging spectrometer, especially for the Fourier optical system in a Sagnac Fourier imaging spectrometer.

[0026] The aperture stop 1 is located at the front focal plane F of the lens group 2, so it has the characteristics of front pupil and image space telecentricity. In the Sagnac interferometer, the chief rays of each field of view are parallel to the optical axis, so that the on-axis and off-axis optical path differences of the Sagnac interferometer are the same, and the uniformity of illumination on the image plane is improved. The closer the aperture stop 1 is to the lens group 2, the better the off-axis image quality will be. The invention is used for the Fourier lens in the Sagnac type Fourier transform imaging spe...

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Abstract

The lens group comprises: a positive meniscus lens and a negative meniscus lens; after the negative meniscus lens there are a front doublet lens, a biconvex lens and a rear doublet lens; the front doublet lens is negative focal power; the focal power synthesized by the positive meniscus lens, negative meniscus lens and front doublet lens is negative focal power; the biconvex lens is positive power, and the rear doublet lens is negative focal power.

Description

technical field [0001] The invention relates to a Fourier optical system, in particular to a telecentric optical system with wide-spectrum automatic apochromatism, long working distance, and front aperture, which can be used as an independent optical system, and is especially suitable for Sagnac-type Fourier optical systems. Fourier optics in an imaging spectrometer. technical background [0002] The Sagnac Fourier transform interferometric imaging spectrometer generally consists of three sets of independent optical imaging systems connected in series. The front mirror produces a primary image of the target on its slit at the focal plane, and the slit image is transversely sheared into two virtual images by the Sagnac transverse shearing interferometer. The slit is also located on the object focal plane of the Fourier mirror, and the Fourier mirror outputs two coherent plane waves with a certain shear angle to form interference fringes. Cylindrical mirrors compress the int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G02B9/60G02B1/02G02B5/04G01J3/14G01J3/12
Inventor 赵葆常杨建峰陈立武常凌颖贺应红
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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