CN205404405U - System for laser lamp -house power change error during elimination BSDF measures - Google Patents
System for laser lamp -house power change error during elimination BSDF measures Download PDFInfo
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- CN205404405U CN205404405U CN201521029831.8U CN201521029831U CN205404405U CN 205404405 U CN205404405 U CN 205404405U CN 201521029831 U CN201521029831 U CN 201521029831U CN 205404405 U CN205404405 U CN 205404405U
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Abstract
The utility model discloses a system for laser lamp -house power change error during elimination BSDF measures, the system includes laser lamp -house, prismatic speculum, laser power meter probe, laser power meter, motor drive module, motion control card, BSDF signal probe, BSDF signal processor, PC and shading sleeve. Carried out BSDF when measuring to surveying the sample, before every measuring point is measured, rotate by the prismatic speculum of motor drive modular dirve, make the change of measuring laser power in its reflection laser lamp -house's light path to the laser power meter, transmit the BSDF result of rectifying this measuring point according to the situation of change in the PC again to to eliminate the error that laser lamp -house power change aroused.
Description
Technical field
This utility model relates to materials optical scattering properties fields of measurement, eliminates the system of laser light source power variation error during BSDF measures particularly to a kind of.
Background technology
Two-way dispersion distribution function (BidirectionalScatteringDistributionFunction, i.e. BSDF) is to describe light to be irradiated to behind a surface to the function of different directions scattering situation.BSDF is one and not only includes incident direction but also include the function in scattering direction, because of referred to herein as " two-way ".
The conventional relative measurement method of the measurement of current BSDF is measured, namely to the known diffuse-reflectance on-gauge plate of reflectivity ρ and sample, the surface of the two it is respectively radiated to light source, then measure BSDF signal value respectively at the measurement point of same scattering, the BSDF value of sample can be obtained further according to below equation principle:
In formula, θiIncidence zenith angle for sample；Incident orientation angle for sample；θsOutgoing zenith angle for sample；Outgoing azimuth for sample；θrOutgoing zenith angle for diffuse-reflectance on-gauge plate；VsBSDF signal value for sample；V0BSDF signal value for diffuse-reflectance on-gauge plate；ρ is the hemispherical reflectance of diffuse-reflectance on-gauge plate.
When measuring BSDF function with relative measurement method, general laser is as light source, but owing to the power of LASER Light Source can change in measurement process, thus error can be brought to BSDF measurement result.
Utility model content
The purpose of this utility model is in that the shortcoming overcoming prior art is with not enough, owing to laser light source power changes caused error when elimination measures material BSDF with relative method, improve the accuracy of measurement result, it is provided that a kind of eliminate the system of laser light source power variation error during BSDF measures.
The purpose of this utility model is achieved through the following technical solutions: a kind of eliminate the system of laser light source power variation error during BSDF measures, it is characterised in that include LASER Light Source, prismatic reflecting mirror, laser power meter probe, laser power meter, motor-driven module, motion control card, BSDF signal probe, BSDF signal processor, PC and shading sleeve；Described LASER Light Source, prismatic reflecting mirror, motor-driven module, laser power meter probe is arranged in described shading sleeve；Described prismatic reflecting mirror is positioned at the front end place of described LASER Light Source light-emitting window, and its central shaft is concentric with the output shaft of described motor-driven module is connected, and can be rotated by described motor-driven module drive；Described prismatic reflecting mirror is in the process rotated, can first make laser optical path reflex in described laser power meter probe and record the deviation value between laser actual power and its nominal reference power now, make the light hole that laser optical path passed through and passed described shading sleeve be irradiated to sample surface again and carry out BSDF measurement, and according to the deviation value of described laser light source power, measurement result is revised accordingly；
Preferably, described prismatic reflecting mirror is positive multi-edge column-shaped and can rotate around its central shaft, and the side of prismatic reflecting mirror is the minute surface with high reflectance.
Preferably, the central shaft of described prismatic reflecting mirror is vertical and non-intersect with the light path of described LASER Light Source, the distance of described central shaft and laser optical path more than the center of prismatic reflecting mirror bottom surface to the distance of bottom surface side, and less than the distance of prismatic reflecting mirror bottom center to bottom surface end points, so that prismatic reflecting mirror can make laser optical path pass through and be irradiated on sample in its side when rotating extremely different positions, or light path is made to reflex in the receiving transducer of described laser power meter.
Preferably, described laser power meter is connected with described PC, and described laser power meter can measure the laser power after reflecting via described prismatic reflecting mirror and in power data transmission to PC.
Preferably, described motor-driven module is connected with PC by motion control card, and motor-driven module outfan is connected on the central shaft of described prismatic reflecting mirror and is driven prismatic reflecting mirror to rotate by PC by motor control card control.
Preferably, described BSDF signal probe is connected with BSDF signal processor, and BSDF signal processor is connected with PC, and BSDF signal probe and BSDF signal processor gather the BSDF data signal of sample and transmit to PC.
Preferably, described LASER Light Source, prismatic reflecting mirror, laser power meter probe and motor-driven module are installed in described shading sleeve, thus keeping mutual relative position constant and the impact of isolated environment light；Described shading sleeve can rotate in perpendicular around the central point of sample such that it is able to makes laser be irradiated to sample surface with any incident angle.
Preferably, described prismatic reflecting mirror is four-prism shape reflecting mirror.
A kind of eliminate the method for laser light source power variation error during BSDF measures, it is characterised in that comprise the following steps:
S1, the value and power reference measuring the LASER Light Source of diffuse-reflectance on-gauge plate and BSDF reference value, first make prismatic reflecting mirror turn to the position that laser optical path can reflex to laser power meter receiving transducer, measure the power of now LASER Light Source and transmit in PC and be set to the value and power reference of LASER Light Source；
S2, the rapidly prismatic reflecting mirror of rotation, to the position that laser optical path can be made to pass through, make laser be irradiated on diffuse-reflectance on-gauge plate, BSDF signal probe and BSDF signal processor collection BSDF signal value now are BSDF reference value；
S3, change sample, selected measurement point first makes prismatic reflecting mirror rotate laser optical path is reflexed to laser power meter receiving transducer, measure the power of now LASER Light Source, the power correction factor of this measurement point LASER Light Source can be accessed by value and power reference divided by performance number now；
S4, the rapidly prismatic reflecting mirror of rotation make laser optical path pass through and are irradiated on sample, by BSDF signal probe and BSDF signal processor collection BSDF signal value now, the value of the BSDF of this measurement point can be obtained in conjunction with BSDF reference value, it is multiplied by BSDF value after power correction factor can be corrected again, eliminates laser light source power and change the measurement error caused；
S5, the next one of sample being measured point, repeat described S2-S4 step, until having surveyed all measurements point, the BSDF that namely can complete sample measures.
This utility model compared with prior art, has the advantage that and beneficial effect:
This utility model is in the process that sample carries out BSDF measurement, before each measurement point is measured, can variation error between laser light source actual power and rated power, and correct the BSDF result of this measurement point according to variation error, thus eliminate the error that laser light source power change is caused.With tradition spectroscope to laser beam splitter thus recording compared with the method for laser light source power, this method is absent from due to beam splitting, the power of laser being caused the situation of weakening, is also absent from due to self instable resultant error caused spectroscopical.
Accompanying drawing explanation
Fig. 1 is the light path of LASER Light Source system schematic when being changed.
Fig. 2 is the light path of LASER Light Source system schematic when not being changed.
The light path that Fig. 3 is LASER Light Source is reflexed to the front elevational schematic in laser power probe by prismatic reflecting mirror.
Fig. 4 is that the light path of LASER Light Source is by prismatic reflecting mirror the front elevational schematic shining sample surface.
Label declaration: 1 LASER Light Source；
2 prismatic reflecting mirrors；
3 laser power meter probes；
4 motor-driven modules；
5 BSDF signal probes；
6 PCs；
7 samples；
8 motion control cards；
9 laser power meters；
10 BSDF signal processors；
11 shading sleeves.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment 1
As shown in Fig. 1～2, a kind of eliminate the system of LASER Light Source 1 changed power error during BSDF measures, it is characterised in that include LASER Light Source 1, prismatic reflecting mirror 2, laser power meter probe 3, laser power meter 9, motor-driven module 4, motion control card 8, BSDF signal probe 5, BSDF signal processor 10, PC 6 and shading sleeve 11；Described LASER Light Source 1, prismatic reflecting mirror 2, motor-driven module 4, laser power meter probe 3 is arranged in described shading sleeve 11；Described prismatic reflecting mirror 2 is positioned at the front end place of described LASER Light Source 1 light-emitting window, and its central shaft is concentric with the output shaft of described motor-driven module 4 is connected, and can be driven by described motor-driven module 4 and rotate；Described prismatic reflecting mirror 2 is in the process rotated, can first make laser optical path reflex in described laser power meter probe 3 and record the deviation value between laser actual power and its nominal reference power now, make the light hole that laser optical path passed through and passed described shading sleeve 11 be irradiated to sample 7 surface again and carry out BSDF measurement, and according to the deviation value of described LASER Light Source 1 power, measurement result is revised accordingly；
Described prismatic reflecting mirror 2 is regular triangular prism shaped and can rotate around its central shaft, and the side of prismatic reflecting mirror 2 is the minute surface with high reflectance.
The central shaft of described prismatic reflecting mirror 2 is vertical and non-intersect with the light path of described LASER Light Source 1, the distance of described central shaft and laser optical path more than the center of prismatic reflecting mirror 2 bottom surface to the distance of bottom surface side, and less than the distance of prismatic reflecting mirror 2 bottom center to bottom surface end points, so that prismatic reflecting mirror can make laser optical path pass through when rotating extremely different positions and be irradiated on sample 7 in its side, or light path is made to reflex in the receiving transducer of described laser power meter 9.
Described laser power meter 9 is connected with described PC, and described laser power meter 9 can measure the laser power after reflecting via described prismatic reflecting mirror 2 and in power data transmission to PC 6.
Described motor-driven module 4 is connected with PC 6 by motion control card 8, and motor-driven module 4 outfan is connected on the central shaft of described prismatic reflecting mirror 2 to be passed through motion control card 8 by PC 6 and controls to drive prismatic reflecting mirror 2 to rotate.
Described BSDF signal probe 5 is connected with BSDF signal processor 10, and BSDF signal processor 10 is connected with PC 6, and BSDF signal probe 5 and BSDF signal processor 10 gather the BSDF data signal of sample 7 and transmit to PC.
Described LASER Light Source 1, prismatic reflecting mirror 2, laser power meter probe 3 and motor-driven module 4 are installed in described shading sleeve 11, thus keeping mutual relative position constant and the impact of isolated environment light；Described shading sleeve 11 can rotate in perpendicular around the central point of sample 7 such that it is able to makes laser be irradiated to sample surface with any incident angle.
A kind of eliminate the method for LASER Light Source 1 changed power error during BSDF measures, it is characterised in that comprise the following steps:
(1) value and power reference and the BSDF reference value of the LASER Light Source 1 of diffuse-reflectance on-gauge plate are measured, first make prismatic reflecting mirror 2 turn to the position that laser optical path can reflex to laser power meter 9 receiving transducer, measure the power of now LASER Light Source 1 and transmit in PC and be set to the value and power reference of LASER Light Source 1；
(2) rotate rapidly prismatic reflecting mirror 2 again to the position that laser optical path can be made to pass through, make laser be irradiated on diffuse-reflectance on-gauge plate, BSDF signal probe 5 and BSDF signal processor 10 the BSDF signal value gathered now is BSDF reference value；
(3) sample 7 is changed, first make prismatic reflecting mirror 2 rotate selected measurement point and laser optical path is reflexed to laser power meter 9 receiving transducer, measure the power of now LASER Light Source 1, the power correction factor of this measurement point LASER Light Source 1 can be obtained by value and power reference divided by performance number now；
(4) rotate rapidly prismatic reflecting mirror 2 again make laser optical path pass through and be irradiated on sample 7, BSDF signal value now is gathered by BSDF signal probe 5 and BSDF signal processor 10, the value of the BSDF of this measurement point can be obtained in conjunction with BSDF reference value, it is multiplied by BSDF value after power correction factor can be corrected again, eliminates the measurement error that LASER Light Source 1 changed power causes；
(5) next one of sample 7 being measured point, repeat above (2)-(4) step, until having surveyed all measurement points, the BSDF that can complete sample 7 measures.
Embodiment 2
Embodiment 2 is substantially similar with embodiment 1, and it is different in that the prismatic reflecting mirror 2 of the present embodiment is four-prism shape.
Above-described embodiment is this utility model preferably embodiment; but embodiment of the present utility model is also not restricted to the described embodiments; other any without departing from the change made under spirit of the present utility model and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (8)
1. eliminate the system of laser light source power variation error during BSDF measures, it is characterised in that include LASER Light Source, prismatic reflecting mirror, laser power meter probe, laser power meter, motor-driven module, motion control card, BSDF signal probe, BSDF signal processor, PC and shading sleeve；Described LASER Light Source, prismatic reflecting mirror, motor-driven module, laser power meter probe is arranged in described shading sleeve；Described prismatic reflecting mirror is positioned at the front end place of described LASER Light Source light-emitting window, and its central shaft is concentric with the output shaft of described motor-driven module is connected, and is rotated by described motor-driven module drive；Described prismatic reflecting mirror is in the process rotated, first make laser optical path reflex in described laser power meter probe and record the deviation value between laser actual power and its nominal reference power now, make the light hole that laser optical path passed through and passed described shading sleeve be irradiated to sample surface again and carry out BSDF measurement, and according to the deviation value of described laser light source power, measurement result is revised accordingly.
2. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterized in that: described prismatic reflecting mirror is positive multi-edge column-shaped and can rotate around its central shaft, and the side of prismatic reflecting mirror is the minute surface with high reflectance.
3. the system of laser light source power variation error in elimination BSDF measurement according to claim 1 and 2, it is characterized in that: the central shaft of described prismatic reflecting mirror is vertical and non-intersect with the light path of described LASER Light Source, the distance of described central shaft and laser optical path more than the center of prismatic reflecting mirror bottom surface to the distance of bottom surface side, and less than the distance of prismatic reflecting mirror bottom center to bottom surface end points.
4. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterized in that: described laser power meter is connected with described PC, described laser power meter can measure the laser power after reflecting via described prismatic reflecting mirror and in power data transmission to PC.
5. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterized in that: described motor-driven module is connected with PC by motion control card, and motor-driven module outfan is connected on the central shaft of described prismatic reflecting mirror and is driven prismatic reflecting mirror to rotate by PC by motor control card control.
6. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterized in that: described BSDF signal probe is connected with BSDF signal processor, BSDF signal processor is connected with PC, and BSDF signal probe and BSDF signal processor gather the BSDF data signal of sample and transmit to PC.
7. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterised in that: described LASER Light Source, prismatic reflecting mirror, laser power meter are popped one's head in and motor-driven module is installed in described shading sleeve and mutual alignment remains unchanged；Described shading sleeve can rotate in perpendicular around the central point of sample such that it is able to makes laser be irradiated to sample surface with any incident angle.
8. the system of laser light source power variation error in elimination BSDF measurement according to claim 1, it is characterised in that: described prismatic reflecting mirror is positive multi-edge column-shaped reflecting mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521029831.8U CN205404405U (en) | 2015-12-10 | 2015-12-10 | System for laser lamp -house power change error during elimination BSDF measures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521029831.8U CN205404405U (en) | 2015-12-10 | 2015-12-10 | System for laser lamp -house power change error during elimination BSDF measures |
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| Publication Number | Publication Date |
|---|---|
| CN205404405U true CN205404405U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521029831.8U Withdrawn - After Issue CN205404405U (en) | 2015-12-10 | 2015-12-10 | System for laser lamp -house power change error during elimination BSDF measures |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403537A (en) * | 2015-12-10 | 2016-03-16 | 华南理工大学 | System and method for eliminating errors caused by power changes of laser light source in BSDF measurement |
-
2015
- 2015-12-10 CN CN201521029831.8U patent/CN205404405U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403537A (en) * | 2015-12-10 | 2016-03-16 | 华南理工大学 | System and method for eliminating errors caused by power changes of laser light source in BSDF measurement |
| CN105403537B (en) * | 2015-12-10 | 2018-01-05 | 华南理工大学 | The system and method for eliminating laser light source power variation error in BSDF measurements |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160727 Effective date of abandoning: 20180105 |
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| AV01 | Patent right actively abandoned |