Light splitting module of grating with holes

Abstract

The utility model provides a perforated grating light splitting module, which is composed of an entrance slit, a first reflector, a second reflector, a perforated grating, a third reflector and an exit slit, incident light coupled to the entrance slit is reflected by the first reflector and then collimated by the second reflector, and different wavelengths are diffracted to different angles by the perforated grating. And after being reflected and focused by the third reflector, the light with the specific wavelength is focused to the exit slit through a central hole of the perforated grating. And any wavelength output within the range of 200-1100 nm with the bandwidth less than 0.1 nm can be realized.

Description

Technical Field

[0001] The utility model relates to optics, in particular to a perforated grating light splitting module. Background Art

[0002] In the design, debugging and production of optical instruments, a light source with narrow line width and continuously adjustable output wavelength is crucial. Although existing light sources such as mercury lamps and argon lamps have a series of narrow line width emission spectra in the range of 200-1100nm, their emission spectra are independent of each other and cannot continuously adjust the output of a specified wavelength; although the emission spectra of deuterium lamps and tungsten lamps are continuous, they do not meet the requirements of monochromatic narrow line width. Based on the spectroscopy of deuterium lamps and tungsten lamps, spectrophotometers can continuously output any wavelength between 200-1100nm, but the output line width is generally greater than 1nm, which cannot meet the requirements of narrow line width (<0.1nm). Utility Model Content

[0003] The utility model provides a perforated grating light splitting module. By selecting the wavelength of a wide spectrum light source, the module can realize output of any wavelength within the range of 200nm to 1100nm with a bandwidth less than 0.1nm.

[0004] The technical solution of the utility model is: a perforated grating light splitting module.

[0005] The implementation mode of the utility model is as follows: Figure 1 As shown: the holey grating spectrometer module consists of an incident slit, a first reflector, a second reflector, a holey grating, a third reflector, and an exit slit. The incident light coupled to the incident slit is reflected by the first reflector, and then collimated by the second reflector. The holey grating diffracts different wavelengths to different angles. The light of a specific wavelength is reflected and focused by the third reflector, and then focused to the exit slit through the central hole of the holey grating.

[0006] Among them, the first reflector is a plane mirror, the second reflector is a concave mirror, the third reflector is a concave mirror, and the diameter of the central hole of the hole grating is 3-10mm. The light collimated by the second reflector is parallel to the normal of the second reflector, and the light captured by the third reflector after diffraction by the hole grating is parallel to the normal of the third reflector. The angle of the hole grating corresponds to different output wavelengths. By rotating the angle of the hole grating by -30° to 30°, different wavelengths can be output at the exit slit. By selecting the wavelength of the wide spectrum light source, the module can achieve any wavelength output in the range of 200nm to 1100nm with a bandwidth less than 0.1nm.

[0007] The beneficial effects of the utility model are:

[0008] A perforated grating spectroscopic module is proposed. By selecting the wavelength of a wide-spectrum light source, the module can output any wavelength within the range of 200nm to 1100nm with a bandwidth less than 0.1nm. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the optical path structure of the utility model. DETAILED DESCRIPTION

[0010] The utility model is further described below in conjunction with the accompanying drawings and implementation examples.

[0011] The implementation mode of the utility model is as follows: Figure 1 As shown: the holey grating spectrometer module consists of an incident slit 1, a first reflector 2, a second reflector 3, a holey grating 4, a third reflector 5, and an exit slit 6. The incident light coupled to the incident slit 1 is reflected by the first reflector 2, and then collimated by the second reflector 3. The holey grating 4 diffracts different wavelengths to different angles. The light of a specific wavelength is reflected and focused by the third reflector 5, and then focused to the exit slit 6 through the central hole of the holey grating 4.

[0012] Among them, the first reflector 2 is a plane mirror, the second reflector 3 is a concave mirror, the third reflector 5 is a concave mirror, and the diameter of the central hole of the hole grating 4 is 3-10mm. The light collimated by the second reflector 3 is parallel to the normal of the second reflector 3, and the light diffracted by the hole grating 4 and captured by the third reflector 5 is parallel to the normal of the third reflector 5. The angle of the hole grating 4 corresponds to different output wavelengths. By rotating the angle of the hole grating 4 by -30° to 30°, different wavelength outputs can be achieved at the exit slit 6. By selecting the wavelength of the wide spectrum light source, the module can achieve any wavelength output in the range of 200nm to 1100nm with a bandwidth less than 0.1nm.

[0013] The above description is only a preferred embodiment of the utility model, and does not constitute any form of limitation to the utility model. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. A perforated grating spectrometer module, characterized in that: It consists of an incident slit, a first reflector, a second reflector, a holey grating, a third reflector, and an exit slit. The incident light coupled to the incident slit is reflected by the first reflector, collimated by the second reflector, and then diffracted to different angles by the holey grating. Light of a specific wavelength is reflected and focused by the third reflector, and then focused to the exit slit through the central hole of the holey grating.

2. The perforated grating spectrometer module according to claim 1, characterized in that: The first reflector is a plane mirror.

3. The perforated grating spectrometer module according to claim 1, characterized in that: The second reflecting mirror and the third reflecting mirror are concave mirrors.

4. The perforated grating spectrometer module according to claim 1, characterized in that: The center hole diameter of the perforated grating is 3-10mm.

5. The perforated grating spectrometer module according to claim 1, characterized in that: The light collimated by the second reflector is parallel to the normal line of the second reflector, and the light diffracted by the holed grating and incident on the third reflector is parallel to the normal line of the third reflector.

6. The perforated grating spectrometer module according to claim 1, characterized in that: In order to achieve the purpose of outputting different wavelengths, the angle of the rotating hole grating is rotated by -30° to 30°.

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