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Special light receiving structure

A special light, receiving fiber technology, applied in the field of optical instruments, can solve the problem of low utilization rate of light energy, and achieve the effect of improving system sensitivity and signal-to-noise ratio, improving light energy utilization rate, and enhancing system signal strength

Inactive Publication Date: 2018-04-03
FUZHOU PHOTOP QPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiency of the low light energy utilization rate of the Raman spectrometer in the prior art, the purpose of the present invention is to provide a special light receiving structure that improves the light energy utilization rate at one end of the signal collection, and then achieves the enhancement of the signal of the Raman spectrometer system

Method used

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Examples

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Embodiment 1

[0014] Example 1, such as figure 2 As shown, the present invention includes a receiving optical fiber 1, a signal light collection optical system 2 and a pump light collimator 3, and the signal light collection optical system 2 includes a signal coupling lens 21, a dichroic filter 22 and a coaxially arranged sequentially. The signal collection focusing lens 23, the dichroic filter 22 transmits the Raman light and reflects the pump light, the object to be tested 4 is set at the focal point of the signal collection focusing lens 23, and the pump light collimator 3 Set on one side of the dichroic filter 22, the pump light emitted by the pump light collimator 3 is irradiated on the dichroic filter 22 and then reflected to the signal collecting focusing lens 23; the receiving optical fiber 1 is multiple , a plurality of receiving optical fibers 1 form an optical fiber bundle, each receiving optical fiber 1 is fixed on a fixed shell with a spherical structure, and the light receivi...

Embodiment 2

[0017] Example 2, such as image 3 As shown, the present invention includes a receiving optical fiber 1, a signal light collection optical system 2 and a pump light collimator 3, and the signal light collection optical system 2 includes a signal coupling lens 21, a dichroic filter 22 and a coaxially arranged sequentially. The signal collection focusing lens 23, the dichroic filter 22 transmits the Raman light and reflects the pump light, the object to be tested 4 is set at the focal point of the signal collection focusing lens 23, and the pump light collimator 3 Set on one side of the dichroic filter 22, the pump light emitted by the pump light collimator 3 is irradiated on the dichroic filter 22 and then reflected to the signal collecting focusing lens 23; the receiving optical fiber 1 is multiple , a plurality of receiving optical fibers 1 form an optical fiber bundle, each receiving optical fiber 1 is fixed on a fixed shell with a spherical structure, and the light receivin...

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Abstract

The invention discloses a special light receiving structure. The special light receiving structure comprises a plurality of receiving optical fibers, a signal light collecting light path system and apumping light collimator. The signal light collecting optical path system comprises a signal coupling lens, a dichroic optical filter and a signal collecting and focusing lens, wherein the signal coupling lens, the dichroic optical filter and the signal collecting and focusing lens are coaxially arranged in sequence. A to-be-tested object is arranged at the focal point of the signal collecting andfocusing lens. The pumping light collimator is arranged on one side of the dichroic optical filter. The pumping light emitted by the pumping light collimator is emitted to the dichroic optical filterand then is reflected to the signal collecting and focusing lens. The plurality of receiving optical fibers form an optical fiber bundle. Each receiving optical fiber is fixed on a fixed shell with aspherical surface structure, and the light receiving ends of all the receiving optical fibers are folded and gathered at the focal point of the signal coupling lens. According to the invention, signal collecting optical fibers in the optical path of a spectrograph are distributed in a three-dimensional spherical shape, so that the light energy utilization rate at the signal collection end is improved. Furthermore, the signal strength of a Raman spectrometer system can be enhanced, and the system sensitivity and the signal-to-noise ratio can be improved.

Description

technical field [0001] The invention relates to the field of optical instruments, in particular to a special light receiving structure. Background technique [0002] Such as figure 1 As shown, the light receiving structure of the Raman spectrometer in the prior art includes 01, a signal coupling lens 02, a dichroic filter 03, a signal collecting lens 04 and a pump light collimator 05, and the pump light collimator 05 The emitted pump light is irradiated on the dichroic filter 03 and reflected to the signal collection lens 04, and then irradiated on the object to be tested 06 after being focused, and the object to be tested 06 is excited to generate Raman light, and the Raman light After passing through the signal collection lens 04, the dichroic filter 03 and the signal coupling lens 02, it enters into 01. In the above structure, there is only one 01, and the NA value of the receiving optical fiber 01 is not greater than 0.5, resulting in most pull Mann light cannot enter ...

Claims

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Application Information

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IPC IPC(8): G02B6/42
CPCG02B6/4204
Inventor 吴砺李俊梅林磊代会娜
Owner FUZHOU PHOTOP QPTICS CO LTD