CN102809550A - Continuous spectrum two-way transmission distribution function measuring device - Google Patents

Continuous spectrum two-way transmission distribution function measuring device Download PDF

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Publication number
CN102809550A
CN102809550A CN2012103052390A CN201210305239A CN102809550A CN 102809550 A CN102809550 A CN 102809550A CN 2012103052390 A CN2012103052390 A CN 2012103052390A CN 201210305239 A CN201210305239 A CN 201210305239A CN 102809550 A CN102809550 A CN 102809550A
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CN
China
Prior art keywords
fiber probe
track
optical fiber
lighting
detection optical
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CN2012103052390A
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Chinese (zh)
Inventor
汪洪源
刘彬
王付刚
张伟
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哈尔滨工业大学
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Priority to CN2012103052390A priority Critical patent/CN102809550A/en
Publication of CN102809550A publication Critical patent/CN102809550A/en

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Abstract

The invention provides a continuous spectrum two-way transmission distribution function measuring device and relates to a two-way transmission distribution function measuring device, in order to solve the problem of low measurement accuracy of the current device for obtaining the two-way transmission distribution function. The measuring device comprises a lighting system, a detecting system, a mechanical rotation angle system, a control system and a data processing system, wherein a lighting fiber-optics probe of the lighting system is fixedly arranged on a lighting fiber-optics probe track of the mechanical rotation angle system, a light source signal output end of the lighting system is connected with a light source signal input end of the data processing system; a detecting fiber-optics probe of the detecting system is fixedly arranged on a detecting fiber-optics probe track of the mechanical rotation angle system, a measuring signal output end of the detecting system is connected with a measuring signal input end of the data processing system; and a rotation control signal output end of the control system is connected with a rotation control signal input end of the detecting system. The measuring device is used for measuring the continuous spectrum two-way transmission distribution function.

Description

The two-way transmission distribution function of continuous spectrum measurement mechanism

Technical field

The present invention relates to a kind of measurement mechanism, the two-way transmission distribution function of particularly a kind of continuous spectrum measurement mechanism.

Background technology

Two-way transmission distribution function (Bidirectional transmission Distribution Function is called for short BTDF) is a physical quantity of describing various material spectrum transmissison characteristics from radiometry, on the basis of geometrical optics.It has represented that material is at the transmissison characteristic of any view angle, with reference to Fig. 1 under the different incidence angles condition.

Two-way transmission distribution function is unique deterministic function that has of describing the material transmissison characteristic, and this function definition is the brightness of transmission spoke and the ratio that incides the incident irradiance of material surface on a certain transmission direction, and its mathematic(al) representation is:

θ in the formula i---the incident zenith angle;

---incident orientation angle;

θ t---the transmission zenith angle;

---transmission position angle;

---edge behind the light source irradiation material surface The spectral radiance of direction transmission, unit are W/ (m 2Sr μ m);

---the light source edge Direction incides the spectral irradiance of material surface, and unit is W/ (m 2μ mm).

The wavelength X that two-way transmission distribution function is an incident light, incident zenith angle θ i, the incident orientation angle Transmission zenith angle θ tWith the transmission position angle Function, it is by the decision of factors such as the density of material, refractive index, thickness.

In field of Computer Graphics, two-way transmission distribution function is used for describing transmissison characteristic transparent, the translucent object material, can accurately realize transparent, translucent Three-dimension Target modeling based on two-way transmission distribution function.At design of Optical System and manufacture field, two-way transmission distribution function is an important parameter of estimating optical properties such as optical element, optical thin film.Also can make full use of the two-way transmissison characteristic of material in the daily life,, can disperse the light that object sends, reach light homogenizing, fuzzy imaging effect like the frosted glass door and window.The commercial production field relates to the calculating or the measurement of numerous element optical bi-directional transmissison characteristics, like the liquid crystal panel of LCD LCD, glass curtain wall etc.

Two-way transmission distribution function normally obtains through experiments of measuring.According to present searchable document, the Arizona optical centre has been carried out the BTDF measurement Research the earliest in nineteen eighty-two.Adopt 632.8nm, 3.391 μ m, the laser instrument of 10.6 μ m measure the BTDF data that obtained 3 wavelength as light source.Limited by light source, can't obtain the measurement data of the two-way transmission distribution function of continuous spectrum.Angle measurement unit had been built by Massachusetts Institute of Technology (MIT) in 2007, adopted digital camera to obtain the measurement data of the two-way transmission distribution function of material as data acquisition system (DAS).Measuring the spectral coverage scope is 380 ~ 1700 μ m, and the measured angular scope is 10 ~ 80 ° of zenith angles, 0 ~ 315 ° at position angle, because camera has certain size, making takes measurement of an angle has received certain restriction.

Summary of the invention

The objective of the invention is in order to solve the low problem of measurement device precision of the two-way transmission distribution function of present acquisition, the present invention provides the two-way transmission distribution function of a kind of continuous spectrum measurement mechanism.

The two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism, it comprises illuminator, detection system, mechanical corner system, control system and data handling system;

The lighting fiber of illuminator probe is fixedly mounted on the track of lighting fiber probe of mechanical corner system; The light signal output terminal of illuminator is connected with the light signal input end of data handling system; The detection optical fiber of detection system probe is fixedly mounted on the track of detection optical fiber probe of mechanical corner system; The measuring-signal output terminal of detection system is connected with the measuring-signal input end of data handling system, and the rotation control signal output terminal of control system is connected with the rotation system signal input part of detection system.

Beneficial effect of the present invention is: the present invention is a kind of simple, the easy to operate device that also can measure the two-way transmission distribution function of continuous spectrum fast that installs.Control and data handling system robot brain tool corner system have improved the speed and the precision of angle rotation when measuring, and stepping angle is 0.36 °, and precision is 1.5% of a stepping angle.The incident radiation illumination of sample is measured through illuminator by control system; Measurement result is exported to data handling system; The transmitted radiation brightness of sample is measured through detection system by control system, and measurement result is exported to data handling system, and control system is controlled whole measuring process automatically; It is easier to make measuring operation get up, and also improves measuring accuracy simultaneously, has saved Measuring Time.

Description of drawings

Fig. 1 be under the different incidence angles condition material at any transmissison characteristic synoptic diagram of view angle.

Fig. 2 is the one-piece construction synoptic diagram of the two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism.

Fig. 3 is the electrical schematic diagram of the two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism.

Fig. 4 is the structural representation of the illuminator of the two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism.

Fig. 5 is the structural representation of the detection system of the two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism.

Fig. 6 is the structural representation of the mechanical corner system of the two-way transmission distribution function of continuous spectrum of the present invention measurement mechanism.

Embodiment

Embodiment one: combine Fig. 2 and Fig. 3 that this embodiment is described; The two-way transmission distribution function of the described continuous spectrum of this embodiment measurement mechanism, it comprises illuminator 1, detection system 2, mechanical corner system 3, control system 4 and data handling system 5;

The lighting fiber of illuminator 1 probe is fixedly mounted on the track of lighting fiber probe of mechanical corner system 3; The light signal output terminal of illuminator 1 is connected with the light signal input end of data handling system 5; The detection optical fiber of detection system 2 probe is fixedly mounted on the track of detection optical fiber probe of mechanical corner system 3; The measuring-signal output terminal of detection system 2 is connected with the measuring-signal input end of data handling system 5, and the rotation control signal output terminal of control system 4 is connected with the rotation system signal input part of detection system 2.

This device major advantage can realize the two-way transmission distribution function measurement of continuous spectrum exactly, and this measurement mechanism can be measured the transmissison characteristic of transparent or semitransparent material.The two-way transmission distribution function of spectrum can reflect the physical attribute of material really, such as transmitance, color etc.Therefore, helpful through measuring the two-way transmission distribution function of the real spectrum data that obtain material to the research material transmissison characteristic.The two-way transmission distribution function of the spectrum data of measuring not only can the two-way transmission distribution function of proof theory model correctness, but also can directly be applied in the computer graphics, make the object of structure truer.Equally, in investigation of materials and application facet, the two-way transmission distribution function of the spectrum of measurement data can provide reference for material chosen.Therefore, the two-way transmission distribution function of the spectrum measurement mechanism of the present invention's development has important application value.

Embodiment two: combine Fig. 4 that this embodiment is described; This embodiment is to the further specifying of the two-way transmission distribution function of embodiment one described continuous spectrum measurement mechanism, and illuminator 1 comprises lighting source 1-1, lighting fiber probe 1-3 and collimation amplifier module 1-4;

The light source output terminal of lighting source 1-1 is connected through the light source input end of optical fiber with lighting fiber probe 1-3; The light source input end with collimation amplifier module 1-4 of the light source output terminal of lighting fiber probe 1-3 is connected, and the light source output terminal of collimation amplifier module 1-4 is the light signal output terminal of illuminator 1.

It is directional light that illuminator 1 is used to regulate emergent light.Lighting source 1-1 can send continuous, stable spectrum at visible light and near-infrared band, and the wave band response according to detection system 2 can also expand to ultraviolet source.Illuminator 1 also is used for data handling system 5 provides the incident radiation illumination of measuring sample.

Embodiment three: combine Fig. 5 that this embodiment is described; This embodiment is further specifying embodiment one described continuous spectrum two-way transmission distribution function measurement mechanism; Detection system 2 comprises spectrometer 2-1 and detection optical fiber probe 2-3; The detectable signal output terminal of detection optical fiber probe 2-3 is connected with the detectable signal input end of spectrometer 2-1 through optical fiber, and the signal output part of spectrometer 2-1 is the measuring-signal output terminal of detection system 2.

Detection optical fiber probe 2-3 is used for the transmission spoke brightness at visible light and near-infrared band reception sample, and measuring-signal is sent to data handling system 5.Wave band response according to detection system 2 can also expand to ultraviolet band and measure.

Embodiment four: combine Fig. 6 that this embodiment is described; This embodiment is further specifying embodiment one described continuous spectrum two-way transmission distribution function measurement mechanism; Machinery corner system 3 comprises the track 3-1 of lighting fiber probe, the track 3-2 of detection optical fiber probe, sample loop 3-3, rotation platform 3-4, stepper motor 3-5 and platform 3-6;

The center of platform 3-6 is provided with through hole, and rotation platform 3-4 embeds and is fixed in the through hole of platform 3-6, and the center of rotation platform 3-4 is provided with a through hole;

Sample loop 3-3 is positioned at the through hole center of rotation platform 3-4, and fixedly connects with platform 3-6;

The track 3-1 of lighting fiber probe is the quarter turn track; The track 3-2 of detection optical fiber probe is the quarter turn track; The track 3-1 of lighting fiber probe is identical with the radius-of-curvature of the track 3-2 of detection optical fiber probe, and the centre point of the track 3-2 of the track 3-1 of lighting fiber probe and detection optical fiber probe coincides with the center of sample loop 3-3;

The track 3-2 of the track 3-1 of lighting fiber probe and detection optical fiber probe is symmetricly set on the both sides up and down of rotation platform 3-4; And the track 3-2 of the track 3-1 of lighting fiber probe and detection optical fiber probe is positioned at same plane, and said plane is perpendicular to the Plane of rotation of rotation platform 3-4;

The track 3-1 of lighting fiber probe all is fixedly connected with rotation platform 3-4 with the track 3-2 of detection optical fiber probe;

Stepper motor 3-5 is used for driven in rotation platform 3-4 rotation;

The lighting fiber probe is positioned on the track 3-1 of lighting fiber probe, and can slide along the track 3-1 of said lighting fiber probe; The detection optical fiber probe is positioned on the track 3-2 of detection optical fiber probe, and can slide along the track 3-2 of said detection optical fiber probe; The light beam of lighting fiber probe output passes sample loop 3-3; The detection optical fiber probe is used to survey the light of sample loop 3-3 transmission;

Lighting fiber probe 1-3 is installed on the track 3-1 of lighting fiber probe; Lighting fiber probe 1-3 moves in a circle at the quarter turn track of the track 3-1 of lighting fiber probe; The track 3-1 of lighting fiber probe moves in a circle around the center line of platform 3-6, realizes different zenith angles and azimuthal lighting condition;

Lighting fiber probe emitted light beams is radiated on the sample loop 3-4 end face;

Detection optical fiber probe 2-3 is installed on the track 3-2 of detection optical fiber probe; The quarter turn track of detection optical fiber probe 2-3 on the track 3-2 of detection optical fiber probe moves in a circle; The track 3-2 of detection optical fiber probe moves in a circle around the center line of platform 3-6, realizes the collection of different zenith angles and bearing data;

The detection optical fiber probe 2-3 emitted light beams of the bottom surface of platform 3-6 is radiated on the bottom surface of sample loop 3-4;

Data handling system 5 comprises data acquisition module and data processing module,

Data acquisition module is used for the sample radiance of recording light spectrometer 2-1 acquisition and the incident irradiance of the light signal that illuminator 1 is exported; The two-way transmission distribution function of transmission spoke brightness calculation that data processing module obtains according to the illumination and the observation angle of record, the incident irradiance of measuring acquisition and measurement, said illumination and observation angle comprise incident zenith angle θ i, the incident orientation angle Transmission zenith angle θ tWith the transmission position angle

Claims (4)

1. the two-way transmission distribution function of continuous spectrum measurement mechanism is characterized in that, it comprises illuminator (1), detection system (2), mechanical corner system (3), control system (4) and data handling system (5);
The lighting fiber of illuminator (1) probe is fixedly mounted on the runing rest of lighting fiber probe of mechanical corner system (3); The light signal output terminal of illuminator (1) is connected with the light signal input end of data handling system (5); The detection optical fiber of detection system (2) probe is fixedly mounted on the runing rest of detection optical fiber probe of mechanical corner system (3); The measuring-signal output terminal of detection system (2) is connected with the measuring-signal input end of data handling system (5), and the rotation control signal output terminal of control system (4) is connected with the rotation system signal input part of detection system (2).
2. the two-way transmission distribution function of continuous spectrum according to claim 1 measurement mechanism is characterized in that, illuminator (1) comprises lighting source (1-1), lighting fiber probe (1-3) and collimation amplifier module (1-4);
The light source output terminal of lighting source (1-1) is connected through the light source input end of optical fiber with lighting fiber probe (1-3); The light source input end with collimation amplifier module (1-4) of the light source output terminal of lighting fiber probe (1-3) is connected, and the light source output terminal of collimation amplifier module (1-4) is the light signal output terminal of illuminator (1).
3. the two-way transmission distribution function of continuous spectrum according to claim 1 measurement mechanism; It is characterized in that; Detection system (2) comprises spectrometer (2-1) and detection optical fiber probe (2-3); The detectable signal output terminal of detection optical fiber probe (2-3) is connected with the detectable signal input end of spectrometer (2-1) through optical fiber, and the signal output part of spectrometer (2-1) is the measuring-signal output terminal of detection system (2).
4. the two-way transmission distribution function of continuous spectrum according to claim 1 measurement mechanism; It is characterized in that; Machinery corner system (3) comprises the track (3-1) of lighting fiber probe, the track (3-2) of detection optical fiber probe, sample loop (3-3), rotation platform (3-4), stepper motor (3-5) and platform (3-6);
The center of platform (3-6) is provided with through hole, and rotation platform (3-4) embeds and is fixed in the through hole of platform (3-6), and the center of rotation platform (3-4) is provided with a through hole;
Sample loop (3-3) is positioned at the through hole center of rotation platform (3-4), and fixedly connects with platform (3-6);
The track (3-1) of lighting fiber probe is the quarter turn track; The track (3-2) of detection optical fiber probe is the quarter turn track; The track (3-1) of lighting fiber probe is identical with the radius-of-curvature of the track (3-2) of detection optical fiber probe, and the centre point of the track (3-2) of the track (3-1) of lighting fiber probe and detection optical fiber probe coincides with the center of sample loop (3-3);
The track (3-2) of the track (3-1) of lighting fiber probe and detection optical fiber probe is symmetricly set on the both sides up and down of rotation platform (34); And the track (3-1) of lighting fiber probe is positioned at same plane with the track (3-2) of detection optical fiber probe, and said plane is perpendicular to the Plane of rotation of rotation platform (3-4);
The track (3-1) of lighting fiber probe all is fixedly connected with rotation platform (3-4) with the track (3-2) of detection optical fiber probe;
Stepper motor (3-5) is used for driven in rotation platform (3-4) rotation;
Lighting fiber probe is positioned on the track (3-1) of lighting fiber probe, and can be in the driving lower edge of stepper motor the track (3-1) of said lighting fiber probe slide; Detection optical fiber probe is positioned on the track (3-2) of detection optical fiber probe, and can be in the driving lower edge of stepper motor the track (3-2) of said detection optical fiber probe slide; The light beam of lighting fiber probe output passes sample loop (3-3); The detection optical fiber probe is used to survey the light of sample loop (3-3) transmission.
CN2012103052390A 2012-08-24 2012-08-24 Continuous spectrum two-way transmission distribution function measuring device CN102809550A (en)

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CN103063579A (en) * 2012-12-26 2013-04-24 东南大学 Spectral detection apparatus for residual gas in storage-state vacuum electronic device and detection method
CN104677859A (en) * 2015-02-10 2015-06-03 华南理工大学 BSDF (Bidirectional Scattering Distribution Function) measurement system and method for eliminating ambient light interference

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CN1657909A (en) * 2005-03-30 2005-08-24 中国农业大学 Method and device for measuring scattered light space distribution
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063579A (en) * 2012-12-26 2013-04-24 东南大学 Spectral detection apparatus for residual gas in storage-state vacuum electronic device and detection method
CN104677859A (en) * 2015-02-10 2015-06-03 华南理工大学 BSDF (Bidirectional Scattering Distribution Function) measurement system and method for eliminating ambient light interference

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