Method and apparatus for measuring stray light ratio in spectrometer

A spectrometer and stray light technology, which is applied in the method of comparing with reference electrical parameters, testing optical properties, spectrum investigation, etc., can solve the problems of difficult solution recovery, easy volatilization, large measurement error, etc., and achieves convenient storage and transportation. , The fiber properties are stable, and the use is convenient and fast.

Inactive Publication Date: 2009-04-22
FOCUSED PHOTONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. The preparation of the solution needs to be weighed first, and then the solution is prepared. The individual differences of the operators will lead to large deviations in the concentration and large measurement errors.
[0006] 2. The determination method is very harmful. Most of the solutions used are volatile and toxic substances. For example, sodium nitrite is a carcinogen, and methylene bromide is a volatile and toxic substance.
The recovery of these solutions is also a d

Method used

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  • Method and apparatus for measuring stray light ratio in spectrometer
  • Method and apparatus for measuring stray light ratio in spectrometer
  • Method and apparatus for measuring stray light ratio in spectrometer

Examples

Experimental program
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Embodiment 1

[0038] like figure 1 , 2 As shown, a device for measuring the ratio of stray light in a spectrometer includes a tungsten lamp 1 , a specific optical fiber 3 that can be connected to the tungsten lamp 1 and a transmission optical fiber 4 .

[0039] The tested spectrometer 2 is SWIR-100 (Focused Photonics, Inc.), and the working band of the tested spectrometer 2 is 1000-2500nm. The working wavelength range of the tungsten lamp 1 is 400-3000nm, so as to match the working band of the spectrometer 2 under test.

[0040] The specific optical fiber 3 is made of quartz containing a high concentration of hydroxyl groups, the concentration of the hydroxyl group is 1000ppm, and the length of the specific optical fiber 3 is 5m, which ensures complete absorption of light with specific wavelengths of 1390nm and 2200nm; The composition of quartz (affected by the process, may contain a low concentration of hydroxyl groups), so that the light with specific wavelengths of 1390nm and 2200nm is...

Embodiment 2

[0046] like image 3 As shown, a device for measuring the ratio of stray light in a spectrometer, the device includes a tungsten lamp 1, a specific optical fiber 3, a transmission optical fiber 4 and an optical switch 5.

[0047] One end of the specific optical fiber 3 and the transmission optical fiber 4 is connected to the tungsten lamp 1 , the other end of the specific optical fiber 3 and the transmission optical fiber 4 is connected to the optical switch 5 , and the optical switch 5 is connected to the spectrometer 2 under test.

[0048] The specific optical fiber 3 , transmission optical fiber 4 , tungsten lamp 1 and measured spectrometer 2 in this embodiment are the same as those used in Embodiment 1.

[0049] This embodiment also discloses a method for measuring the ratio of stray light in a spectrometer, that is, the application process of the above-mentioned device, including the following steps:

[0050] a. If image 3 As shown, the tungsten lamp 1 is connected to ...

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Abstract

The invention discloses a method for measuring ratio of stray light in a spectrometer. The method specifically comprises the following steps: a. a light source and a measured spectrometer are connected by a specific optical fiber and a transmissive optical fiber so that a specific spectrum and a transmission spectrum are obtained respectively; the light source is matched with a service wave band of the measured spectrometer, the specific optical fiber is opaque to the light with a specific wavelength, and the transmissive optical fiber is transparent to the light with the specific wavelength which is in the service wave band; and b. the specific spectrum and the transmission spectrum are compared to obtain the ratio of the stray light of the measured spectrometer at the specific wavelength. The invention also discloses a device for performing the method. The method and the device have the advantages of reasonable design, effective and fast measurement of the stray light ratio, no toxin and no pollution, a plurality of measurable wave bands, stability and convenience, and can be widely applied to detecting the performances of spectrometers.

Description

technical field [0001] The invention relates to a detection method and a device of a spectrometer, in particular to a method and a device for measuring the ratio of stray light in a spectrometer. Background technique [0002] When testing the stray light ratio of the spectrometer, select some opaque solutions at the test wavelength, pass the light through the solution, and test the light intensity at the test wavelength on the tested spectrometer, which is the stray light of the spectrometer at the test wavelength Intensity, the stray light intensity is compared with the light intensity obtained without passing through the solution to obtain the stray light ratio. [0003] According to the National Metrology Verification Regulations of the People's Republic of China - "JJG 689-1990 Ultraviolet, Visible, and Near-Infrared Spectrophotometer" and the evaluation method provided by the National Society for Testing and Materials - ASTM E 387 "Standard Test Method for Estimating St...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J1/10G01M11/02
Inventor 叶华俊刘立鹏
Owner FOCUSED PHOTONICS
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