Spectrum light splitting imaging system light path based on volume hologram grating component light splitting

A volume holographic grating and imaging system technology, which is applied in the field of optical path of spectral spectroscopic imaging system, can solve the problems of narrow free spectral range, complex structure and adjustment, difficult installation and adjustment, etc., and achieves compact structure, simple installation and adjustment, and utilization of light energy. added effect

Inactive Publication Date: 2013-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The system constituted in this way is a typical off-axis system, which has defects such as large volume, difficult installation and adjustment, and poor stability.
The interfe

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  • Spectrum light splitting imaging system light path based on volume hologram grating component light splitting
  • Spectrum light splitting imaging system light path based on volume hologram grating component light splitting
  • Spectrum light splitting imaging system light path based on volume hologram grating component light splitting

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[0014] Such as figure 1 The distant target is imaged at the slit 2 by the telephoto objective lens 1, and the light entering the slit passes through the collimating objective lens 3 to reach the holographic beam splitter 4 for splitting, and the parallel beam is split by the imaging objective lens 5 and imaged on the image plane. , Received by the CCD detector 6.

[0015] The collimating objective lens and the imaging objective lens are an important part of the spectral imaging system. The collimating objective lens collimates the light passing through the slit and then enters the beam splitting device, while the imaging objective lens converges and image the dispersive light on the image plane. For imaging spectrometers, its energy utilization is an important performance indicator of the system. Therefore, when designing collimating objectives and imaging objectives, the relative aperture should be increased as much as possible.

[0016] When the size of the CCD is selected, that ...

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Abstract

The invention relates to a spectrum light splitting imaging system light path based on volume hologram grating component light splitting. Volume hologram grating is adopted as a light splitting component by the spectrum light splitting imaging system light path. Parallel lights which pass through a front imaging lens, a slit and a collimating lens are conducted with diffraction light splitting, after the being split, the lights coalescent, form an image on an image plane through the imaging lens and received by a charge coupled device (CCD) detector. The whole system is small in size and compact in structure, the lights can pass in and out straightly, the utilization rate of light energy is high, and the light splitting performance is good.

Description

technical field [0001] The invention relates to an optical path of a spectral spectroscopic imaging system based on a volume holographic grating spectroscopic component. Background technique [0002] The spectroscopic spectroscopic system is the core of the imaging spectrometer. According to the spectroscopic principle, the spectroscopic system can be divided into two types: dispersion type and modulation type. At present, only the Fourier transform spectrometer of the modulation type is relatively mature. The dispersion type is mainly used in three types: prism, grating, and interferometer. [0003] The prism light splitting system has low dispersion rate and poor light splitting performance. The grating spectroscopic system has a wide spectral measurement range and high resolution, but there is a spectral overlap phenomenon in the ordinary plane diffraction grating, and in the traditional prism or grating spectroscopic instrument, there is often a problem of deflection a...

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Application Information

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IPC IPC(8): G01J3/02G02B27/10G02B27/44G02B5/32
Inventor 蓝天顾美霞于跃吴洪波倪国强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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