Large-field-of-view small-F-number ultrahigh-resolution ultraviolet spectral imager

An ultra-high resolution and ultraviolet spectrum technology, applied in optics, instruments, optical components, etc., can solve the problems of large field of view, small system F number, small system focal length, etc., and achieve superior imaging quality, good system tolerance, The effect of small system size

CN104503065AInactive Publication Date: 2015-04-08CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a large-field-of-view small-F-number ultrahigh-resolution ultraviolet spectral imager and belongs to the technical field of imaging. The large-field-of-view small-F-number ultrahigh-resolution ultraviolet spectral imager is sequentially provided with a first crescent lens, a second crescent lens, a first biconcave lens, an aperture diaphragm, a first biconvex lens, a second biconvex lens, a biconcave lens, a third biconvex lens and a third crescent lens, wherein all lenses are disposed on the same optical axis; the first crescent lens, the second crescent lens and the first biconcave lens form a front lens group to realize primary imaging, and a convergence surface is located on the aperture diaphragm; the first biconvex lens, the second biconvex lens, the second biconcave lens, the third biconvex lens and the third crescent lens form a rear lens group to perform secondary imaging to a converged ray surface of the aperture diaphragm, and an image is located on an image surface. The large-field-of-view small-F-number ultrahigh-resolution ultraviolet spectral imager has the advantages that the components are simple and easy to manufacture, the system is small in size, the tolerance is good, the assembling is facilitated, the imaging quality is excellent, the all-field-of-view full-waveband modulation transfer function value at Nyquist frequency of 1001p / mm is superior to 0.48, and the imaging distortion is lower than 0.5 percent.
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Description

technical field

[0001] The invention belongs to the technical field of ultraviolet spectral imaging, and is a spectral imager optical system with a large field of view and a small F number with ultra-high spatial resolution under a certain ultraviolet bandwidth. Background technique

[0002] High spatial resolution ultraviolet spectral imaging instruments play an important role in many research fields such as ultraviolet warning technology and ultraviolet atmospheric observation. Small high-resolution ultraviolet spectral imaging instruments can quickly and accurately locate missile threats with the advantages of low false alarm rate and high space coverage, which can help improve the early warning ability of short-range and short-range precision missiles; ozone and other gases in the atmosphere It will strongly absorb ultraviolet light between 200nm and 300nm. By carrying it on the space load, this type of instrument can well analyze and remote sensing the atmospheric compo...

Examples

Embodiment Construction

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0014] The invention belongs to the technical field of spectral imaging, and is an imaging spectroscopy system structure capable of acquiring ultraviolet high-fine resolution images of a wide range of scenes under a certain ultraviolet bandwidth. The components in this structure include: a first meniscus lens 1, a second meniscus lens 2, a first biconcave lens 3, an aperture stop 4, a first biconvex lens 5, a second biconvex lens 6, and a second biconcave lens 7 , the third biconvex lens 8, the third meniscus lens 9 and the image plane 10. The first meniscus lens 1, the second meniscus lens 2, the first and the biconcave lens 3 form a front lens group, which realizes a single imaging convergence of the external scene, and the convergence surface is located on the aperture diaphragm; the first biconvex lens 5, the second biconvex lens The convex...