An off-axis three-reflection short-focus front objective lens system for a hyperspectral imager
A hyperspectral imaging, off-axis three-mirror technology, applied in the field of objective lens systems, can solve the problems of single degree of freedom of the lens, poor lens support stability, large volume of the front imaging objective lens, etc., to achieve excellent image quality, compact structure, large vision field effect
Active Publication Date: 2021-07-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0008] In order to solve the technical problems that the existing large relative aperture front imaging objective lens has poor support stability for the lens, or the front imaging objective lens has a large volume, and the lens degree of freedom adjustment is relatively simple, the present invention provides a hyperspectral imaging The instrument's off-axis three-reflection short-focus front objective lens system
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[0097] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0098] Such as Figure 1 to Figure 4 As shown, an off-axis three-mirror short-focus front objective lens system of a hyperspectral imager includes a support base plate 01, a primary mirror assembly, a secondary mirror assembly, a three-mirror assembly, a folding mirror assembly, a filter assembly, and a support base plate 01, the outer cover 81 and the light blocking assembly; the primary mirror assembly includes the primary mirror support seat 02 arranged on the support base plate 01 and the primary reflector 03 installed on the primary mirror support seat 02; the secondary mirror assembly includes the The secondary mirror support base 04 and the secondary reflection mirror 05 installed on the secondary mirror support base 04; the three-mirror assembly includes a three-mirror support base 06 arranged on the support bas...
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The present invention provides an off-axis three-mirror short-focus pre-objective lens system of a hyperspectral imager, which solves the problem of poor support stability for the lens, large volume, and relatively simple adjustment of the degree of freedom of the lens in the existing large relative aperture pre-imaging objective lens. question. The system includes a support base plate and a primary mirror assembly, a secondary mirror assembly, a three-mirror assembly, a folding mirror assembly, and an optical filter assembly on the support base plate; the primary mirror assembly includes a primary mirror support seat and an installation The primary reflector on the primary mirror support base; the secondary mirror assembly includes a secondary mirror support base located on the support base and a secondary reflector installed on the secondary mirror support base; the three-mirror assembly includes three mirrors located on the support base The support seat and the third mirror installed on the three-mirror support seat; the main mirror support seat provides reliable mechanical support for the main reflector, and at the same time can realize the multi-degree-of-freedom adjustment of the main reflector. The three-mirror support seat and the main mirror support The seat structure is the same.
Description
technical field [0001] The invention relates to an objective lens system, in particular to an off-axis three-mirror short-focus front objective lens system of a hyperspectral imager. Background technique [0002] The hyperspectral imager relies on obtaining the two-dimensional spatial position information and one-dimensional spectral information of the object to realize the imaging of the object shape and obtain the spectral characteristics of the object. It has the advantages of high spectral resolution, multiple bands, and the combination of images and spectra, so it can be used to study surface objects, identify object types, identify material components, etc., making it highly valued and widely used in remote sensing and other fields. Applications. [0003] The optical system of a hyperspectral imager generally consists of a pre-imaging objective lens, a collimating objective lens, a spectroscopic system, an imaging objective lens, and a detector. The pre-imaging objec...
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IPC IPC(8): G02B17/06G02B7/182G01J3/28G01J3/02
CPCG01J3/0208G01J3/2823G02B7/182G02B17/0663
Inventor 张兆会李西杰李立波韩亚娟李思远胡炳樑
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI