CN2034276U - Light quantum measuring detecting head - Google Patents
Light quantum measuring detecting head Download PDFInfo
- Publication number
- CN2034276U CN2034276U CN 88206817 CN88206817U CN2034276U CN 2034276 U CN2034276 U CN 2034276U CN 88206817 CN88206817 CN 88206817 CN 88206817 U CN88206817 U CN 88206817U CN 2034276 U CN2034276 U CN 2034276U
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- CN
- China
- Prior art keywords
- light quantum
- quantum measuring
- detecting head
- utility
- model
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- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The utility model discloses an integrating light quantum measuring detecting head, the spectral response curve of which is modified into a straight line section, comprising a cosine corrector (1), a color filter (2) and a photoelectric conversion device (3). The utility model can carry out the light quantum integrating measurement. Compared with the spectroscopic light quantum measuring, the light quantum measuring detecting head of the utility model has the advantages of small size, low cost and high speed.
Description
The utility model belongs to the light quantum measuring sonde.
Utilize the spectral radiance illumination E(λ that existing spectral radiometer can measuring light) (unit: watt/square metre rice), thereby by formula
P（λ）·△λ＝ (λ)/(hc) E（λ）·△λ （1）
Calculate corresponding light quantity subnumber P(λ) △ λ (unit: photon number/square metre second), in tested spectral range, different wave length is carried out single pass and measure, carry out integration again, can obtain tested light quantity subnumber.This method measuring light quantum number with beam split has following shortcoming: the instrument complexity, and bulky, weight is big, and cost is expensive, and it is long to measure a required time.
The purpose of this utility model provides a kind of light quantum measuring sonde.
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of light quantum measuring sonde.
Fig. 2 is q(λ) curve.
Fig. 3 is the interference stopping lightscreening plate transmittance curve.
The utility model is the measuring probe that a kind of integration type is measured the light quantity subnumber, and the spectral response curve of this measuring probe is modified to q(λ) curve, q(λ) equation of curve is
Wherein, λ
1～λ
2Be the measured spectrum segment limit.
This measuring sonde based on principle be: obtain measured spectrum segment limit λ
1～λ
2Interior light quantity subnumber Q will carry out integration to formula (1)
Q＝
P（λ）dλ＝∫ (λ)/(hc) E（λ）dλ （2）
If q(is λ)=K λ, K is a constant, then
Q＝
(q（λ）)/(Khc) E（λ）dλ
＝ 1/(Khc)
q（λ）E（λ）dλ （3）
At measured spectrum segment limit λ
1～λ
2The interior spectral response curve that needs only measuring sonde is modified to q(λ)=K λ straight-line segment, all the other spectral coverage spectral responses are zero, just can survey the light quantity subnumber on the unit interval unit area.The K value can be arbitrarily, by the calibration to probe and whole detection display system, can determine the K value.
Spectral response curve complex curve in fact often of probe can not be adapted to fully and q(λ) curve coincides, and this has just introduced measuring error, and the existence of this error allows within the specific limits.
Light quantum measuring sonde of the present utility model is stacked together in order by cosine corrector (1), color filter (2) and electrooptical device (3) and forms.
The cosine corrector is used for that the light quantum measuring sonde is carried out cosine and proofreaies and correct, and makes the suitable quantum number measurement that is same as from the light of different directions of measuring sonde, and the cosine corrector is an opal glass.
Color filter is to be used for correction to the spectral response curve of the electrooptical device of light quantum measuring sonde.It generally is made up of interference stopping lightscreening plate and coloured optical glass, and when the spectral response curve of electrooptical device met the demands especially, color filter can only be made up of interference stopping lightscreening plate, and the transmitance of interference stopping lightscreening plate is τ c(λ), see Fig. 3.
Electrooptical device is a silicon photocell, its spectral response curve S(λ) with q(λ) curve is at λ
1～λ
2Approaching substantially in the spectral coverage, comparatively convenient when selecting coloured optical glass to form color filter like this.At measured spectrum segment limit λ
1～λ
2In, the spectral response S(λ of electrooptical device) and the spectral transmittance τ (λ) of color filter between must satisfy:
S（λ）·τ（λ）＝kq（λ） （4）
K is a constant.
The utility model has the advantages that volume is little, cost is low, and speed is fast.
Claims (4)
1, a kind of light quantum measuring sonde is characterized in that it is made up of cosine corrector (1), color filter (2) and electrooptical device (3).
2, a kind of light quantum measuring sonde according to claim 1, the material that it is characterized in that said cosine corrector (1) is an opal glass.
3, a kind of light quantum measuring sonde according to claim 1 is characterized in that said color filter (2) is made up of interference stopping lightscreening plate and coloured glass, or only is made up of interference stopping lightscreening plate.
4, a kind of light quantum measuring sonde according to claim 1 is characterized in that said electrooptical device (3) is a silicon photocell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206817 CN2034276U (en) | 1988-06-04 | 1988-06-04 | Light quantum measuring detecting head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206817 CN2034276U (en) | 1988-06-04 | 1988-06-04 | Light quantum measuring detecting head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2034276U true CN2034276U (en) | 1989-03-15 |
Family
ID=4840945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88206817 Withdrawn CN2034276U (en) | 1988-06-04 | 1988-06-04 | Light quantum measuring detecting head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2034276U (en) |
-
1988
- 1988-06-04 CN CN 88206817 patent/CN2034276U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |