Device and method for detecting concave grating resolution and diffraction efficiency

Abstract

The present invention provides a device and method for detecting concave grating resolution and diffraction efficiency. The device comprises a monochromatic light emitting unit, an imaging unit which is arranged on a monochrome light path, a detection unit, a processing unit and a control unit; the monochromatic light emitting unit, the imaging unit, the detection unit, the processing unit and the control unit are connected sequentially; the monochromatic light emitting unit leads test-used monochromatic light into the imaging unit through an optical fiber; spectral intensity is received by a detector in the detection unit; and finally data in the detector are recorded, analyzed and processed by the processing unit, so that data about concave grating resolution and diffraction efficiency can be obtained. The device for detecting the concave grating resolution and diffraction efficiency of the invention is advantageous in simplicity, few required professional devices and simple operation, and can realize simultaneous detection of the resolutions and diffraction efficiencies of various types of concave gratings and can also realize fast detection of the resolutions and diffraction efficiencies of concave gratings of different types and different sizes in a wide band range.

Description

technical field [0001] The invention belongs to the field of spectrum technology, and in particular relates to a device and a test method for detecting the resolution and diffraction efficiency of a concave grating. Background technique [0002] Grating is a very important and widely used high-resolution dispersive optical element, which is widely used in scientific fields such as monochromator, spectral analysis, optical communication technology and optical metrology technology. Since the grating was successfully developed and widely used, it has almost replaced the previous prism as the dispersion element of a new generation of spectroscopic instruments. Factors such as the accuracy of the grating and its diffraction wavelength have profound implications for astronomy, aerospace, medicine, geology and other scientific and technological fields. Impact. Resolution and diffraction efficiency are very important technical performance indicators of the grating, and the resoluti...

AI Technical Summary

Problems solved by technology

[0006] At present, the precise adjustment of most optical systems at home and abroad needs to add a variety of optical auxiliary components. The adjustment procedure is relatively cumbersome, and the influence of each adjustment link is greater, which increases the difficulty of adjustment and depends on the experience of the experimental adjuster. larger

In addition, in the current detection method for the resolution of concave gratings, the object space distance and the image space distance cannot be adjusted freely. Basically, the grating with specific parameters is detected by a specific system, and there are many types of concave gratings, which makes the detection work heavy.

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