CN112816067A - Light detection method - Google Patents
Light detection method Download PDFInfo
- Publication number
- CN112816067A CN112816067A CN201911127107.1A CN201911127107A CN112816067A CN 112816067 A CN112816067 A CN 112816067A CN 201911127107 A CN201911127107 A CN 201911127107A CN 112816067 A CN112816067 A CN 112816067A
- Authority
- CN
- China
- Prior art keywords
- light
- spectrum
- detected
- control unit
- central control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 104
- 238000001228 spectrum Methods 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000000611 regression analysis Methods 0.000 claims abstract description 8
- 238000013213 extrapolation Methods 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 230000003287 optical effect Effects 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2803—Investigating the spectrum using photoelectric array detector
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
A light detection method executed by a light detection device for detecting a to-be-detected light emitted by a light source according to an input power supply comprises the following steps: (A) adjusting the input power supply; (B) detecting a strong light part of the light to be detected to generate a first detection signal; (C) detecting a weak light part of the light to be detected to generate a second detection signal; (D) acquiring and storing a spectrum according to the first and second detection signals; (E) judging whether the total spectrum quantity of the stored spectrum is equal to a preset value or not; (F) if not, re-executing (A) to (E); (G) if so, performing regression analysis on the stored spectrums and the input power supplies corresponding to the spectrums and obtaining curve fitting according to a fitting method; and (H) obtaining a predicted spectrum according to the curve fitting and a third detection signal related to another to-be-detected light, so that the light detection method has the advantages of high detection speed and high sensitivity.
Description
Technical Field
The present invention relates to a light detection method, and more particularly, to a light detection method with good sensitivity and fast detection for strong light and weak light.
Background
The existing optical detection method mainly detects the intensity of light by an array spectrometer. However, the Dynamic range (Dynamic range) of the measured light intensity of the array spectrometer used in the light detection method is affected by the exposure time and the light intensity. The array spectrometer is good for detecting strong light, but because of its low sensitivity to weak light (e.g. 1 lumen), the optical Signal detected by the array spectrometer may be buried in noise or the Signal-to-noise ratio (S/N) of the detected optical Signal is quite small, which causes errors in subsequent Signal analysis.
Although the above problems with the photo detection method can be improved by increasing the exposure time of the array spectrometer, the increase in exposure time results in an increase in measurement time. Therefore, how to improve the sensitivity of the conventional optical detection method, so that the method has a good detection effect on weak light and can shorten the detection time is an important subject.
Disclosure of Invention
The present invention provides a light detection method with high detection speed and high sensitivity.
The light detection method of the invention is suitable for detecting a light source to be detected sent by an input power supply, and is executed by a light detection device, the light detection device comprises an array spectrometer, a photoelectric detector and a central control unit, and the light detection method comprises the following steps:
(A) adjusting the input power supply by using the central control unit;
(B) detecting a strong light part of the light to be detected by using the array spectrometer to generate a first detection signal;
(C) detecting a weak light part of the light to be detected by using the photoelectric detector to generate a second detection signal;
(D) receiving the first and second detection signals by using the central control unit, and performing operation integration according to the first and second detection signals which are currently and correspondingly received so as to obtain a spectrum related to the current light to be detected and store the spectrum;
(E) judging whether a total spectrum quantity of the stored spectrum is equal to a preset value or not by using the central control unit;
(F) when the judgment result of the step (E) is negative, re-executing the step (A) to the step (E);
(G) when the judgment result in the step (E) is yes, the central control unit performs regression analysis on the stored spectrum and the input power supply corresponding to the spectrum respectively, and obtains curve fitting according to a fitting method; and
(H) and obtaining a predicted spectrum related to the other light to be detected by using the light detection device at least according to the curve fitting and a third detection signal related to a weak light part of the other light to be detected.
In the step (D), the central control unit performs calculation and integration on the first and second detection signals corresponding to the central control unit according to a linear extrapolation method to obtain the spectrum related to the current light to be detected.
In the photo-detection method of the present invention, in the step (G), the fitting method is a polynomial fitting method.
The light detection method of the present invention, step (G) includes the following substeps
(G1) Obtaining a peak value, a wavelength maximum value, and a half-peak full-width value corresponding to each spectrum according to each spectrum by using the central control unit, and
(G2) and performing regression analysis on the peak value, the maximum wavelength value, the full width at half peak value and the input power supply corresponding to each spectrum by using the central control unit, and obtaining curve fitting according to the fitting method.
The light detection method of the present invention, step (H) includes the following substeps
(H1) The central control unit is used to adjust the input power,
(H2) detecting the weak light portion of the other light to be detected by the photodetector to generate the third detection signal, the other light to be detected being emitted by the light source according to the input power adjusted by sub-step (H1),
(H3) obtaining a fitted spectrum associated with the other light to be measured by fitting the input power adjusted by the central control unit according to the sub-step (H1) to the curve, and
(H4) and receiving the third detection signal by using the central control unit, and extrapolating the third detection signal and the fitted spectrum according to a linear extrapolation method to obtain the predicted spectrum related to the other to-be-detected light.
In the optical detection method of the present invention, in the step (B), the array spectrometer can detect the light intensity range greater than or equal to 106Particle photons/second.
In the photo-detection method of the present invention, in the step (C), the light intensity range detected by the photo-detector is greater than or equal to 1 photon/second and less than or equal to 10 photons/second10Particle photons/second.
The invention has the beneficial effects that: the light detection method of the invention detects the strong light part of the light to be detected through the array spectrometer, and matches with the high sensitivity and the rapid detection capability of the photoelectric detector on the weak light part, so that the light detection method of the invention has rapid detection and high sensitivity.
Drawings
Other features and effects of the present invention will be clearly apparent from the embodiments with reference to the drawings:
FIG. 1 is a block diagram of a light detection device for implementing one embodiment of the light detection method of the present invention;
FIG. 2 is a flow chart illustrating the light detection method of the embodiment; and
fig. 3 is a flow chart illustrating how step 37 of fig. 2 obtains a predicted spectrum.
Detailed Description
Referring to fig. 1, a light detection device 1 is shown, wherein the light detection device 1 is used to implement an embodiment of the light detection method of the present invention to detect a light to be detected with intensity variation emitted by a light source 2. In this embodiment, the light source 2 emits the light to be measured according to an input power from a power supply 20. The optical detection device 1 includes a light conduction unit 11, an array spectrometer 12, a photodetector 13, and a central control unit 14.
The light conducting unit 11 is used for conducting the light to be measured emitted by the light source 2 to the array spectrometer 12 and the photodetector 13. In this embodiment, the light conducting unit 11 includes a first fiber optic module 111 electrically connected between the light source 2 and the array spectrometer 12, and a second fiber optic module 112 electrically connected between the light source 2 and the photodetector 13. The first fiber optic module 111 is used to transmit a strong light portion of the light to be measured to the array spectrometer 12. The second fiber optic module 112 is used to transmit a weak portion of the light to be measured to the photodetector 13. The array spectrometer 12 is electrically connected between the first fiber optic module 111 and the central control unit 14. The photodetector 13 is electrically connected between the second fiber optic module 112 and the central control unit 14.
Referring to fig. 2 and fig. 3, in the present embodiment, a spectrum of the light to be detected or a predicted spectrum of another light to be detected can be obtained quickly by the light detection apparatus 1 executing the light detection method of the present invention. The light detection method performed by the light detection device 1 sequentially comprises the following steps.
In step 31, the input power is adjusted by the central control unit 14.
In detail, in the present embodiment, the central control unit 14 is electrically connected to the power supply 20 and generates a control signal in response to an input operation (not shown) corresponding to a desired current value, and outputs the control signal to the power supply 20, so that the power supply 20 adjusts a current value of the input power outputted by the power supply 20 to the desired current value according to the control signal, but is not limited thereto. In other embodiments, the central control unit 14 can generate the control signal in response to an input operation corresponding to a desired voltage value, so as to adjust a voltage value of the input power outputted by the power supply 20 to the desired voltage value.
In step 32, the array spectrometer 12 is used to detect the strong light portion of the light to be detected to generate a first detection signal.
In this embodiment, the array spectrometer 12 can detect lightStrong range greater than or equal to 106Particles per second and can therefore be used to detect intense light. The array spectrometer 12 is, for example, but not limited to, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) sensor.
In step 33, the weak portion of the light to be detected is detected by the photodetector 13 to generate a second detection signal.
In the present embodiment, the photodetector 13 has high detection sensitivity, and has excellent and fast detection capability for weak light. The light intensity range detected by the photodetector 13 is greater than or equal to 1 photon/second and less than or equal to 10 photons/second10Particles per second and can therefore be used to detect weak light. The photodetector 13 is, for example, a Photomultiplier (PMT), an Avalanche Photodiode (APD), or a photosensor (Photo sensor).
In step 34, the central control unit 14 is used to receive the first and second detection signals, and perform calculation and integration according to the first and second detection signals received corresponding to the central control unit, so as to obtain the spectrum related to the current light to be detected and store the spectrum.
It should be noted that, the central control unit 14 performs operation and integration on the first and second detection signals received by the central control unit according to a linear extrapolation method, so as to obtain the spectrum related to the current light to be detected.
In step 35, it is determined by the central control unit 14 whether a total number of spectra of the spectra it stores is equal to a predetermined value (e.g., the predetermined value is three). If yes, go to step 36; if not, the steps 31 to 35 are executed again to adjust the current value of the input power again, and another spectrum corresponding to the adjusted input power is obtained again and stored, so that the total spectrum number of the spectrum stored in the central control unit 14 is increased by one, and the step 36 is not executed by repeatedly executing the steps 31 to 35 again until the total spectrum number is equal to the predetermined value.
In step 36, the central control unit 14 performs Regression Analysis (Regression Analysis) on the stored spectrum and the input power corresponding to the spectrum, and obtains a Curve Fitting (Curve Fitting) according to a Fitting method. In the present embodiment, the fitting method is a polynomial fitting method, and step 36 includes sub-step 361 and sub-step 362.
In sub-step 361, a Peak Height (Peak Height), a Peak Wavelength maximum (Peak Wavelength), and a Full width at half maximum (FWHM) corresponding to each spectrum are obtained from each spectrum by the central control unit 14.
In sub-step 362, the central control unit 14 performs regression analysis on the peak value, the maximum value of the wavelength, the full width at half maximum value of the peak value and the input power corresponding to each spectrum, and obtains the curve fitting according to the fitting method.
In step 37, a predicted spectrum corresponding to the other light to be detected is obtained by the light detecting device 1 at least according to the curve fit and a third detection signal corresponding to a weak light portion of the other light to be detected. In the present embodiment, step 37 includes sub-steps 371 through 374.
In sub-step 371, the control signal is generated by the central control unit 14 to adjust the current value of the input power outputted by the power supply 20.
In sub-step 372, the weak portion of the other light to be detected is detected by the photodetector 13 to generate the third detection signal. It should be noted that the other light to be detected is emitted by the light source 2 according to the input power adjusted by the sub-step 371.
In sub-step 373, a fitted spectrum associated with the other light to be measured is obtained by fitting the curve to the input power adjusted by the central control unit 14 according to sub-step 371.
In sub-step 374, the central control unit 14 receives the third detection signal and extrapolates the third detection signal and the fitted spectrum according to a linear extrapolation method to obtain the predicted spectrum related to the other light to be detected.
It should be noted that, the optical detection method of the present invention employs the array spectrometer 12 in combination with the photodetector 13, and both have high sensitivity and fast detection capability for strong light and weak light, and the detectable ranges of both are partially overlapped. When the light to be measured changes to a higher intensity and a higher brightness, the array spectrometer 12 is responsible for the main light intensity detection, and correspondingly, when the light to be measured changes to a lower intensity and a lower brightness, the photodetector 13 is responsible for the main light intensity detection. The array spectrometer 12 and the photodetector 13 respectively output the first detection signal and the second detection signal to the central control unit 14 after detection, and the central control unit 14 performs calculation and integration on the first detection signal and the second detection signal according to the linear extrapolation method, so as to obtain the spectrum related to the light to be detected. In addition, according to sub-steps 371 to 374, after the curve fitting is obtained, the light detection method of the present invention does not need to detect an intense light portion of the another light to be detected by the array spectrometer 12, but can predict the predicted spectrum related to the another light to be detected by using the central control unit 14 to extrapolate the third detection signal generated by the photodetector 13 and the fitted spectrum obtained by the curve fitting according to the linear extrapolation method, so that the light detection method of the present invention can effectively shorten the detection time required for obtaining the predicted spectrum.
In summary, the light detecting method of the present invention detects the strong light portion and the weak light portion of the light to be detected respectively by the array spectrometer 12 and the photodetector 13, so as to solve the problem that the exposure time needs to be prolonged during the weak light detection when the array spectrometer is used to detect the light in the conventional light detecting method. Therefore, compared with the existing light detection method, the light detection method has the characteristics of higher detection sensitivity, quicker detection time and the like.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.
Claims (7)
1. A light detection method is suitable for detecting a light source to be detected sent by an input power supply and is executed by a light detection device, the light detection device comprises an array spectrometer, a photoelectric detector and a central control unit, and the light detection method is characterized by comprising the following steps of:
(A) adjusting the input power supply by using the central control unit;
(B) detecting a strong light part of the light to be detected by using the array spectrometer to generate a first detection signal;
(C) detecting a weak light part of the light to be detected by using the photoelectric detector to generate a second detection signal;
(D) receiving the first and second detection signals by using the central control unit, and performing operation integration according to the first and second detection signals which are currently and correspondingly received so as to obtain a spectrum related to the current light to be detected and store the spectrum;
(E) judging whether a total spectrum quantity of the stored spectrum is equal to a preset value or not by using the central control unit;
(F) when the judgment result of the step (E) is negative, re-executing the step (A) to the step (E);
(G) when the judgment result in the step (E) is yes, the central control unit performs regression analysis on the stored spectrum and the input power supply corresponding to the spectrum respectively, and obtains curve fitting according to a fitting method; and
(H) and obtaining a predicted spectrum related to the other light to be detected by using the light detection device at least according to the curve fitting and a third detection signal related to a weak light part of the other light to be detected.
2. The light detection method of claim 1, wherein: in step (D), the central control unit performs operation integration on the first and second detection signals corresponding to the central control unit according to a linear extrapolation method to obtain the spectrum related to the current light to be detected.
3. The light detection method of claim 1, wherein: in step (G), the fitting method is a polynomial fitting method.
4. The light detection method of claim 3, wherein: step (G) includes the following substeps
(G1) Obtaining a peak value, a wavelength maximum value, and a half-peak full-width value corresponding to each spectrum according to each spectrum by using the central control unit, and
(G2) and performing regression analysis on the peak value, the maximum wavelength value, the full width at half peak value and the input power supply corresponding to each spectrum by using the central control unit, and obtaining curve fitting according to the fitting method.
5. The light detection method of claim 1, wherein: step (H) includes the following substeps
(H1) The central control unit is used to adjust the input power,
(H2) detecting the weak light portion of the other light to be detected by the photodetector to generate the third detection signal, the other light to be detected being emitted by the light source according to the input power adjusted by sub-step (H1),
(H3) obtaining a fitted spectrum associated with the other light to be measured by fitting the input power adjusted by the central control unit according to the sub-step (H1) to the curve, and
(H4) and receiving the third detection signal by using the central control unit, and extrapolating the third detection signal and the fitted spectrum according to a linear extrapolation method to obtain the predicted spectrum related to the other to-be-detected light.
6. The light detection method of claim 1, wherein: in step (B), the array spectrometer can detect light intensity in a range greater than or equal to 106Particle photons/second.
7. The light detection method of claim 1, wherein: in step (C), the light intensity range detected by the photodetector is greater than or equal to 1 photon/second and less than or equal to 10 photons/second10Particle photons/second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127107.1A CN112816067A (en) | 2019-11-18 | 2019-11-18 | Light detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127107.1A CN112816067A (en) | 2019-11-18 | 2019-11-18 | Light detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112816067A true CN112816067A (en) | 2021-05-18 |
Family
ID=75852436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911127107.1A Pending CN112816067A (en) | 2019-11-18 | 2019-11-18 | Light detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112816067A (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5621205A (en) * | 1994-11-10 | 1997-04-15 | Tri-Tronics Company, Inc. | Photoelectric sensor having an enhanced dynamic range control circuit |
| CN1179648A (en) * | 1996-08-02 | 1998-04-22 | 株式会社京都第一科学 | Optical measuring device, and spectroscopic light equipment and photodetector suitable therefore |
| CN2591591Y (en) * | 2002-09-27 | 2003-12-10 | 北京农业信息技术研究中心 | Digital wide-measurement range illumination sensor |
| US20050225840A1 (en) * | 2004-02-11 | 2005-10-13 | Drasek William A V | Dynamic laser power control for gas species monitoring |
| CN1877269A (en) * | 2005-05-23 | 2006-12-13 | 株式会社半导体能源研究所 | Photoelectric conversion device and manufacturing method thereof |
| US20070262238A1 (en) * | 2006-03-31 | 2007-11-15 | Sanyo Electric Co., Ltd. | Photo detecting apparatus |
| CN200981061Y (en) * | 2006-10-30 | 2007-11-28 | 佛山市国星光电科技有限公司 | Luminous diode photoelectric parameter online testing screening circuit |
| CN101393052A (en) * | 2008-10-29 | 2009-03-25 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on secondary generation inverted image at normal temperature |
| CN102185649A (en) * | 2011-05-09 | 2011-09-14 | 成都优博创技术有限公司 | System and method for monitoring high-precision suddenly received optical power |
| JP2012026915A (en) * | 2010-07-26 | 2012-02-09 | Hioki Ee Corp | Photometric device |
| CN102394694A (en) * | 2011-11-02 | 2012-03-28 | 成都优博创技术有限公司 | RSSI (received signal strength indicator) monitoring circuit with high sampling accuracy |
| CN102437876A (en) * | 2012-01-04 | 2012-05-02 | 武汉华工正源光子技术有限公司 | RSSI (Received Signal Strength Indicator) circuit used for OLT (Optical Line Terminal) optical module in passive optical network |
| CN103076087A (en) * | 2012-12-28 | 2013-05-01 | 西北核技术研究所 | Mid-infrared photoelectric detector driving circuit, detector assembly and assembly array |
| US20130114073A1 (en) * | 2010-08-04 | 2013-05-09 | Hitachi High-Technologies Corporation | Light Quantity Detection Method and Device Therefor |
| CN203554442U (en) * | 2013-10-22 | 2014-04-16 | 青岛海信宽带多媒体技术有限公司 | RSSI monitoring circuit |
| CN104113736A (en) * | 2014-07-30 | 2014-10-22 | 中国极地研究中心 | Aurora activity monitoring system |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106791511A (en) * | 2016-11-25 | 2017-05-31 | 华东师范大学 | A kind of quantum dot optoelectronic detects double mode reading circuit |
| CN107677366A (en) * | 2017-09-27 | 2018-02-09 | 中国科学院合肥物质科学研究院 | A kind of irradiance meter observation system of Larger Dynamic scope |
-
2019
- 2019-11-18 CN CN201911127107.1A patent/CN112816067A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5621205A (en) * | 1994-11-10 | 1997-04-15 | Tri-Tronics Company, Inc. | Photoelectric sensor having an enhanced dynamic range control circuit |
| CN1179648A (en) * | 1996-08-02 | 1998-04-22 | 株式会社京都第一科学 | Optical measuring device, and spectroscopic light equipment and photodetector suitable therefore |
| CN2591591Y (en) * | 2002-09-27 | 2003-12-10 | 北京农业信息技术研究中心 | Digital wide-measurement range illumination sensor |
| US20050225840A1 (en) * | 2004-02-11 | 2005-10-13 | Drasek William A V | Dynamic laser power control for gas species monitoring |
| CN1877269A (en) * | 2005-05-23 | 2006-12-13 | 株式会社半导体能源研究所 | Photoelectric conversion device and manufacturing method thereof |
| US20070262238A1 (en) * | 2006-03-31 | 2007-11-15 | Sanyo Electric Co., Ltd. | Photo detecting apparatus |
| CN200981061Y (en) * | 2006-10-30 | 2007-11-28 | 佛山市国星光电科技有限公司 | Luminous diode photoelectric parameter online testing screening circuit |
| CN101393052A (en) * | 2008-10-29 | 2009-03-25 | 西安理工大学 | Partial gating glimmer detector of image intensifier based on secondary generation inverted image at normal temperature |
| JP2012026915A (en) * | 2010-07-26 | 2012-02-09 | Hioki Ee Corp | Photometric device |
| US20130114073A1 (en) * | 2010-08-04 | 2013-05-09 | Hitachi High-Technologies Corporation | Light Quantity Detection Method and Device Therefor |
| CN102185649A (en) * | 2011-05-09 | 2011-09-14 | 成都优博创技术有限公司 | System and method for monitoring high-precision suddenly received optical power |
| CN102394694A (en) * | 2011-11-02 | 2012-03-28 | 成都优博创技术有限公司 | RSSI (received signal strength indicator) monitoring circuit with high sampling accuracy |
| CN102437876A (en) * | 2012-01-04 | 2012-05-02 | 武汉华工正源光子技术有限公司 | RSSI (Received Signal Strength Indicator) circuit used for OLT (Optical Line Terminal) optical module in passive optical network |
| CN103076087A (en) * | 2012-12-28 | 2013-05-01 | 西北核技术研究所 | Mid-infrared photoelectric detector driving circuit, detector assembly and assembly array |
| CN203554442U (en) * | 2013-10-22 | 2014-04-16 | 青岛海信宽带多媒体技术有限公司 | RSSI monitoring circuit |
| CN104113736A (en) * | 2014-07-30 | 2014-10-22 | 中国极地研究中心 | Aurora activity monitoring system |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106791511A (en) * | 2016-11-25 | 2017-05-31 | 华东师范大学 | A kind of quantum dot optoelectronic detects double mode reading circuit |
| CN107677366A (en) * | 2017-09-27 | 2018-02-09 | 中国科学院合肥物质科学研究院 | A kind of irradiance meter observation system of Larger Dynamic scope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109100018B (en) | Large-dynamic-range weak light detection system based on avalanche photodiode array chip | |
| Otte et al. | Characterization of three high efficiency and blue sensitive silicon photomultipliers | |
| RU2649607C2 (en) | Method for controlling the gain and zero setting for multi-pixel photon counter and light-measuring system implementing said method | |
| CN110244311B (en) | Laser radar receiving device, laser radar system and laser ranging method | |
| US9164144B2 (en) | Characterization and calibration of large area solid state photomultiplier breakdown voltage and/or capacitance | |
| KR102323217B1 (en) | Depth sensor, 3 Dimensional Camera and Method for controlling noise of macro pixel | |
| JP6764529B2 (en) | Photodetectors and portable electronics | |
| Mazzillo et al. | Characterization of sipms with nir long-pass interferential and plastic filters | |
| US20080067328A1 (en) | Spectrophotometer | |
| US20100301192A1 (en) | Solid-state photomultiplier module with improved signal-to-noise ratio | |
| CN107356914B (en) | Calibration system for satellite-borne laser radar detector | |
| CN112816067A (en) | Light detection method | |
| CN105241796A (en) | Dust detection apparatus | |
| US8957363B2 (en) | Differential photodiode integrator circuit for absorbance measurements | |
| TWI710754B (en) | Light detection method | |
| US20130107255A1 (en) | Spectrophotometer | |
| TWI719660B (en) | Light detection device | |
| CN112710389A (en) | Light detecting device | |
| US6542239B1 (en) | Method for testing the functionality of a spectrometer and a spectrometer comprising a fault recognition device | |
| KR101476610B1 (en) | Multi-junction detector system | |
| KR20210095676A (en) | Devices and methods for measuring semiconductor-based light sources | |
| CN110501073A (en) | Spectral method of detection and device based on single photodiodes | |
| CN107576482B (en) | Optical parameter measuring device and measuring method thereof | |
| CN210322006U (en) | Single-photodiode-based variable spectral response solid-state photodetector | |
| US11361951B2 (en) | System and method for photomultiplier tube image correction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210518 |
|
| WD01 | Invention patent application deemed withdrawn after publication |