Freeform Surface Imaging Spectrometer System
An imaging spectrometer and curved surface technology, applied in the direction of using diffraction elements to generate spectra, instruments, spectrometry/spectrophotometry/monochromator, etc., can solve the problem of large system volume, weight and lens number, and it is difficult to design imaging Spectrometers, free-form surface variables and other problems, to achieve the effect of simple system structure, high comprehensive performance, low distortion
Active Publication Date: 2020-09-29
TSINGHUA UNIV +1
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Problems solved by technology
[0004] However, the existing imaging spectrometers seldom use free-form surfaces to design. The reason is that the free-form surfaces have many variables and too many degrees of freedom. There are many considerations such as the volume, weight and number of lenses of the system. It is difficult to design a simple structure and low cost. Inexpensive imaging spectrometer with better imaging effect
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[0022] The technical solution of the present invention will be further described in detail below according to the drawings in the description and in combination with specific embodiments.
[0023] see figure 1 and 2 , an embodiment of the present invention provides a free-form surface imaging spectrometer system 100 . Wherein, the free-form surface imaging spectrometer system 100 includes a primary mirror 102, a primary mirror 104, and a third mirror 106 adjacent to and arranged at intervals. After being reflected by the mirror 106, it is received by a detector 108 and imaged.
[0024] The surface shapes of the primary mirror 102 , the secondary mirror 104 and the third mirror 106 are all free-form surfaces. The secondary mirror 104 is an aperture stop. The secondary mirror 104 is a grating with a free-form surface shape. The free-form surface grating is obtained by intersecting a group of parallel planes with equal intervals and the free-form surface. The distance between...
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The present invention involves a free surface imaging spectrometer system, including: a main reflex mirror, referred to as the main mirror, on the light path of the light, and defines the first three -dimensional right -angle coordinate system as the original point of the main reflex mirror;The secondary mirror is located on the main reflex mirror light road, and defines the two -dimensional right -angle coordinate system as the original point of the reflex mirror as the original point;The top point of the third reflection mirror is defined by the original point of the third three -dimensional straight angle coordinate system; and a detector, after the light is reflected by the main mirror, secondary mirror, and three mirrors, it is received and imaged by the detector.The second mirror is the pore diameter of the system.The reflex surface of the main mirror and the three mirrors is six free surfaces.The secondary mirror is a grating with six free curved surface -shaped, which is obtained from the parallel plane of the parallel plane of the parallel plane of a set of spacing.
Description
technical field [0001] The invention relates to the field of optical design, in particular to a free-form surface imaging spectrometer system. Background technique [0002] Imaging spectrometers have important applications in the fields of biomedicine, chemical analysis, earth remote sensing, and space exploration, among which the key instrument is an optical system with a dispersive device. Optical systems with dispersive devices have a larger field of view, wider spectral range, and higher resolution, which can promote the development of related application fields and have been the goal that people have been pursuing for a long time. [0003] A free-form surface refers to a non-traditional curved surface that cannot be expressed by spherical or aspherical coefficients. A free-form surface is an optical surface with a complex surface shape that does not have symmetry. Freeform optics encompasses the design of optical systems having at least one freeform surface. In the pa...
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IPC IPC(8): G01J3/28
CPCG01J3/2823G01J2003/1847G01J3/18G01J3/0208G01J3/021G01J3/024
Inventor 朱钧张本奇金国藩范守善
Owner TSINGHUA UNIV