Image flattening convex grating splitting system
A convex grating and spectroscopic system technology, which is applied in the field of spectroscopic instruments, can solve problems such as high requirements for production, installation and debugging, and complex structure of the spectroscopic system, and achieve the effects of low production cost, high spectral resolution, and simple structure
Inactive Publication Date: 2010-10-06
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0004] The present invention is aimed at the problem that the structure of the current light splitting system is relatively complicated, and the requirements for manufacture, installation and debugging are relatively high, and a flat image field convex grating light splitting system is proposed.
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[0009] The flat image field convex grating beam splitting system includes a light source 1, a condenser lens 2, an incident slit 3, a large concave reflecting mirror 4, a convex grating 5 and an area detector 6.
[0010] Build a convex grating spectroscopic system such as figure 1 As shown, the details are as follows:
[0011] 1. Choose a convex grating 5 and a large concave reflector 4 so that the radius r of the convex grating is greater than half of the radius R of the concave reflector, namely:
[0012] 2. Place the spherical centers of the convex grating 5 and the large concave mirror 4 on the same point, and the optical axes coincide to establish a concentric, coaxial beam splitting system.
[0013] 3. Place the incident slit 3 in a plane passing the common spherical center of the convex grating 4 and the large concave mirror 5 and perpendicular to the common optical axis, the direction is parallel to the common optical axis, and the distance from the center point to the center...
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The invention relates to an image flattening convex grating splitting system, which comprises a light source, a condenser lens, an entrance slit, a large concave mirror, a convex grating, and an area array detector. The centers of sphere of the convex grating and the large concave mirror are positioned at the same point and the optical axes of the convex grating and the large concave mirror are superposed; the entrance slit is arranged in a plane which passes through the shared center of sphere of the convex grating and the large concave mirror and is vertical to the shared optical axis; the direction of the entrance slit is parallel to the optical axes; the area array detector is arranged in the plane which passes through the shared center of sphere of the convex grating and the large concave mirror and is vertical to the shared optical axis; and the area array detector and the entrance slit are distributed on two sides of the optical axis. The image flattening convex grating splitting system has the advantages of high spectral resolution, near-zero spectral image distortion, simple structure, convenient installation, low manufacturing cost, and the like.
Description
Technical field [0001] The invention relates to a spectrometer, in particular to a flat image field convex grating spectroscopic system. Background technique [0002] The spectroscopic system is the core component of the spectrum analysis instrument. Currently, flat gratings or concave gratings are generally used as the spectroscopic components. A spectroscopic system using a flat grating as a spectroscopic element requires a mechanical scanning structure to achieve spectral analysis. The scanning structure can be adopted when the concave grating is used as the spectroscopic element, or the focusing effect of the concave grating can be used to continuously distribute the spectrum on a plane, which can be used in combination with the area array detector to achieve the purpose of high-speed analysis and realize the miniaturization of the instrument And lightweight. However, the dispersion spectrum of the flat image field concave grating spectroscopic system has relatively serious...
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IPC IPC(8): G01J3/18G02B27/10
Inventor黄元申张大伟倪争技夏俊徐邦联朱冬月庄松林
OwnerUNIV OF SHANGHAI FOR SCI & TECH