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Measurement method of diffraction efficiency of concave grating

A concave grating, diffraction efficiency technology, applied in the field of spectroscopy

Inactive Publication Date: 2012-04-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Problems with this test method: only the diffraction efficiency of planar gratings can be measured, and the diffraction efficiency of concave gratings cannot be tested

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  • Measurement method of diffraction efficiency of concave grating
  • Measurement method of diffraction efficiency of concave grating
  • Measurement method of diffraction efficiency of concave grating

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Embodiment Construction

[0025] The present invention is executed according to the flow chart of method steps set by the technical solution, that is, according to the method steps of step 1, step 2, step 3, step 4 and step 5. Wherein, the measuring device of step 1, image 3 The tungsten lamp 17 adopts Philips 10W, 6V, 6605 type tungsten lamp; the deuterium lamp 18 adopts Beijing Shuguang DL2.5 deuterium lamp; the base material of the condenser 19, the concave collimator 21 and the reflective condenser 23 are all made of K9 optical glass , the surface is plated with aluminum, the focal length f=100mm; the material of the incident slit 20 is 45# steel sheet, the adjustable range of the slit width is 0.1-2mm, and the height is 5mm; 26 is produced by Nanjing Chunhui Company, and the model is FSI-UV; the materials of the front monochromator housing 25 and the measuring monochromator housing 33 are all made of aluminum with a thickness of 6 mm; The main materials of the light-emitting arm 32 and the grati...

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Abstract

The invention discloses a measurement method of diffraction efficiency of a concave grating, belonging to a measurement method of grating diffraction efficiency in the technical field of spectrum. The technical problem to be solved is to provide a measurement method of diffraction efficiency of a concave grating. The technical scheme solving the technical problem comprises the following steps: step 1, providing a set of device capable of measuring the diffraction efficiency of the concave grating and a measurement control system; step 2, preparing a measured concave grating and a standard concave reflector; step 3, measuring the reflection luminous flux of the standard concave reflector; step 4, measuring the diffraction luminous flux of the measured concave grating; and step 5, calculating the diffraction efficiency of the measured concave grating according to the definition of the grating diffraction efficiency. The method has the advantages of simple operation, and stable and reliable test result.

Description

technical field [0001] The invention belongs to a method for testing the diffraction efficiency of a concave grating and relates to the field of spectrum technology. Background technique [0002] Diffraction efficiency is the most important technical index of a grating, which directly affects the energy transmission characteristics of a spectroscopic instrument. For grating users, they often put forward requirements for the required grating, requiring that the diffraction efficiency of the grating at the mth order of a certain wavelength λ must meet the specified technical index requirements, so the research and production units of the grating must Test the grating diffraction efficiency. [0003] Grating diffraction efficiency usually refers to relative diffraction efficiency in measurement, that is, at a given wavelength and spectral order, the ratio of the diffracted light flux of the grating received by the detector to the reflected light flux of a standard mirror with ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02G01M11/04
Inventor 巴音贺希格寇婕婷吴娜于宏柱唐玉国齐向东
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI