Unlock instant, AI-driven research and patent intelligence for your innovation.

A spectrometer and its calibration method

A calibration method and spectrometer technology, applied in the field of spectrometers, can solve the problem that the large dynamic linear range is not as good as that of silicon photovoltaic cells, and achieve the effect of reducing the level of internal stray light and correcting the linearity

Active Publication Date: 2019-12-17
HANGZHOU EVERFINE PHOTO E INFO
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because the fast spectrometer uses array detectors, such as CCD, etc., although the sensitivity is high, the large dynamic linear range is generally not as good as that of silicon photocells.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A spectrometer and its calibration method
  • A spectrometer and its calibration method
  • A spectrometer and its calibration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2 As shown, this embodiment discloses a spectrometer structure, including an incident slit, a dispersion unit 1, an array detector 2 and a broadband detector 3, wherein the dispersion unit 1 is a concave flat-field grating, and the array detector 2 is a CCD array Detector, broadband detector 3 is a silicon photocell, and is provided with in front of the photosensitive face of silicon photocell so that silicon photocell produces relative spectral sensitivity curve to the zero-order sub-beam formed by light splitting and CIE standard human eye luminous efficiency function V(λ) phase matching color filters. The incident optical unit is an optical fiber or an optical fiber bundle.

[0038] The working principle of this spectrometer is as follows: the light to be measured is received by the incident optical unit of the optical fiber or fiber bundle, enters the interior of the spectrometer through the incident slit, and enters the surface of the dispersion un...

Embodiment 2

[0049] Such as image 3 As shown, this embodiment discloses a spectrometer structure, including an incident slit, a collimating mirror, a dispersion unit 1, an array detector 2 and a broadband detector 3, wherein the dispersion unit 1 includes a dispersion element 1-1 and The imaging element 1-2, and the dispersion element 1-1 is a planar grating, the imaging element 1-2 is a concave mirror; the array detector 2 is a CCD array detector, and the broadband detector 3 is a silicon photodiode, and the silicon photodiode The photosensitive face of the diode is provided with a color filter that makes the relative spectral sensitivity curve of the zero-order beam formed by the silicon photodiode match the CIE light effect visual function V(λ).

[0050] The working principle of the spectrometer is as follows: the light to be measured enters the inside of the spectrometer through the incident slit of the spectrometer, and after passing through the collimating mirror, a parallel beam is...

Embodiment 3

[0053] Such as Figure 4 As shown, this embodiment discloses a spectrometer structure, including an incident slit, a collimating mirror, a dispersive unit 1, an array detector 2 and a broadband detector 3, wherein the dispersive unit 1 includes a dispersive element 1-1 and an imaging Element 1-2, and dispersion element 1-1 is a planar grating, imaging element 1-2 is a concave mirror; array detector 2 is a CCD array detector, broadband detector 3 is a silicon photodiode, and in the silicon photodiode A color filter is arranged in front of the photosensitive surface so that the relative spectral sensitivity curve of the silicon photodiode to the zero-order beam formed by light splitting matches the CIE light effect visual function V(λ).

[0054] The working principle of the spectrometer is as follows: the light to be measured enters the inside of the spectrometer through the incident slit of the spectrometer, and after passing through the collimating mirror, a parallel beam is f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a spectrometer and a correction method thereof, comprising an incident optical unit, an incident slit, a dispersion unit for dispersing incident light, and an array detector for receiving dispersed light; The band detector receives the zero-order light beam formed by the diffraction of the dispersive unit. In addition, by setting a color filter that matches the V(λ) curve in front of the photoelectric conversion element of the broadband detector, the photometric information measured by the broadband detector is used to correct the linearity of the array detector to obtain the measured absolute radiation The linearity and measurement accuracy of the spectrometer are further improved; in addition, the relative spectral power distribution measured by the array detector can be used to correct the spectral mismatch of the photometric information of the wide-band detector to improve the photometric measurement accuracy.

Description

【Technical field】 [0001] The invention belongs to the field of optical radiation measurement, and in particular relates to a spectrometer. 【Background technique】 [0002] Existing fast spectrometers (also known as array spectrometers) generally consist of an incident optical unit, an incident slit, a dispersion unit, an imaging unit, and an array detector. The structure is as follows: figure 1 As shown, the light beam enters the spectrometer through the incident optical unit from the incident slit, and the dispersed light of different wavelengths is projected to the photosensitive surface of the array detector through the dispersion unit to realize the measurement of the spectral power distribution. [0003] According to the multi-slit diffraction effect, it can be known that the zero-order diffracted light of the grating does not undergo dispersion, which is also called the zero-order beam. The detector of the spectrometer actually measures the non-zero-order diffraction sp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
CPCG01J3/2803G01J3/2823G01J2003/2876
Inventor 潘建根
Owner HANGZHOU EVERFINE PHOTO E INFO