CN106501184A - Optical glass measurement apparatus and its measuring method - Google Patents
Optical glass measurement apparatus and its measuring method Download PDFInfo
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- CN106501184A CN106501184A CN201610939532.0A CN201610939532A CN106501184A CN 106501184 A CN106501184 A CN 106501184A CN 201610939532 A CN201610939532 A CN 201610939532A CN 106501184 A CN106501184 A CN 106501184A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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Abstract
The present invention provides the devices and methods therefor of a kind of high-acruracy survey optical glass absorption coefficient of light and mist degree.Optical glass measurement apparatus, are included successively by light path：There is system in double light sources；Double beam system；Photodetection system；Data handling system.The present invention is measured while realizing that reference light and sample pass through light intensity using spectrophotometric dual-beam synchro measure principle, can eliminate luminous power drift at all to measuring the impact of stability, while carrying out mechanical switch without the need for motor drive mechanism to sample；There is 400nm～700nm wave band absorption coefficients of light, 1000nm～1100nm absorption coefficients of light and 1000nm～1100nm haze measurement functions, it is easy to test operation, and with higher measuring accuracy.
Description
Technical field
The present invention relates to a kind of measurement apparatus of optical glass, more particularly to a kind of absorption coefficient of light to optical glass
And automatic measurement mechanism and its measuring method of mist degree.
Background technology
The absorption coefficient of light and mist degree of optical glass are the important indicators in optical glass parameter, and in recent years with
Extensive application of the infrared product in security protection, vehicle-mounted market, the infrared part absorption coefficient of light and mist degree index seem particularly
Important.There was only the determination of light absorption instrument and mist degree analyzer of visible light wave range (400nm～700nm) at present both at home and abroad, and
The analyzer simple structure, using monochromatic light drive test method for testing, the factor such as luminous power drift can have a strong impact on measuring accuracy, and for
The correlation technique of the light absorbs of infrared band and mist degree test also belongs to blank.
Content of the invention
The technical problem to be solved is to provide a kind of high-acruracy survey optical glass absorption coefficient of light and mist
The device of degree.
The present invention also provides the measuring method of above-mentioned measurement apparatus.
The present invention solves the technical scheme that adopted of technical problem：Optical glass measurement apparatus, are included successively by light path：
There is system in double light sources：Include high-accuracy stable light source, collimating mirror, optical filter and reducing diaphragm successively by light path；
Or 1000nm～1100nm laser instrument and Polarization Controller；
Double beam system：By light path include successively variable optical attenuator, spectroscope, the first deviation mirror, frequency dividing chopper, second
Deviation mirror, integrating sphere, standard reflecting plate and light trapping, and testing sample is additionally provided between frequency dividing chopper and integrating sphere
Frame；
Photodetection system：Selenium cell detector or indium gallium arsenide detector；
Data handling system：Include dual pathways lock-in amplifier and computer by light path.
Further, light source switch is provided between described pair of light source generation system, and described pair of light source occurs system and press
Parameter according to measurement different-waveband is switched by light source switch.
Further, the testing sample frame is divided into light absorbs testing sample frame according to test parameter difference and mist degree is to be measured
Specimen holder.
Further, the Photodetection system is different according to test wave band, and selenium cell detector or indium is respectively adopted
Gallium arsenide detector.
Further, the variable optical attenuator makes light intensity attenuation extremely detect with the selenium cell detector or indium GaAs
The illumination of device coupling.
Further, the frequency dividing chopper is the ac modulation that reference light and flashlight load different characteristic frequency.
Further, the mist degree testing sample frame is arranged at integrating sphere front window.
Further, the standard reflecting plate is arranged on integration ball center's rear wall position, and slide downward angle is 1～10
Degree.
Further, outer wall on rear side of the adjacent integrating sphere of the light trapping, the incidence that light trapping is entered by standard reflecting plate
Light beam is repeatedly turned back in some little prisms in light trapping, makes light beam delayed reflex return integrating sphere.
Further, the selenium cell detector and indium gallium arsenide detector are embedded in integrating sphere bottom windows.
The measuring method of optical glass measurement apparatus, when carrying out visible light wave range absorption coefficient of light measurement to testing sample
When, the method is comprised the following steps：
1) length L of testing sample is measured, and testing sample is placed on light absorbs testing sample frame by standard of closure reflecting plate
On be placed in light path；
2) after collimating mirror, beam collimation is a branch of directional light to high-accuracy stable light source, after optical filter filters, then
Light beam light hole footpath is adjusted by reducing diaphragm, then through variable optical attenuator, make light intensity attenuation to selenium cell detector
The illumination of coupling；
3) light beam is divided into two-way after spectroscope, the first deviation mirror by light beam, all the way as reference light, Ling Yilu
As flashlight, the ac modulation that chopper is that reference light and flashlight load different characteristic frequency is divided；
4) reference light is turned to through the second deviation mirror, flashlight after the testing sample on light absorbs testing sample frame,
Two-beam is projected into integrating sphere simultaneously, and selenium cell detector receives the optical signal of the visible light wave range of double light path simultaneously, and
It is converted into voltage signal；
5) it is input in computer after dual pathways lock-in amplifier is by the filtering of voltage signal gain amplifier and calculates, passes through
Formula obtains the visible ray coefficient of light absorption K of testing sample,
K=1/L { 2ln [1- ((nd-1)/(nd+1))2]+ln[1+((nd-1)/(nd+1))4]-lnT} (2)
K：The absorption coefficient of light；
L：The length of testing sample
Nd：Glass d lines (587.6nm) refractive index.
The measuring method of optical glass measurement apparatus, surveys when 1000nm～1100nm absorption coefficients of light are carried out to testing sample
During amount, the method is comprised the following steps：
1) length L of testing sample is measured, high-accuracy stable light source and standard reflecting plate is closed, testing sample is placed on
It is placed in light path on light absorbs testing sample frame；
2) switching of 1000nm～1100nm laser instrument is placed in light path using light source switch, 1000nm～1100nm swashs
Light device is through Polarization Controller, then after variable optical attenuator, makes light intensity attenuation to the illumination that mates with indium gallium arsenide detector；
3) light beam is divided into two-way after spectroscope and the first deviation mirror by light beam, and all the way as reference light, another road is made
For flashlight, the ac modulation that chopper is that reference light and flashlight load different characteristic frequency is divided；
4) reference light is turned to through the second deviation mirror, flashlight after the testing sample on light absorbs testing sample frame,
Two-beam is projected into integrating sphere simultaneously, and indium gallium arsenide detector receives the optical signal of double light path simultaneously, and is converted into voltage letter
Number；
5) it is input in computer after dual pathways lock-in amplifier is by the filtering of voltage signal gain amplifier and calculates, passes through
Formula (2) obtains 1000nm～1100nm coefficient of light absorption Ks of testing sample,
K=1/L { 2ln [1- ((nd-1)/(nd+1))2]+ln[1+((nd-1)/(nd+1))4]-lnT} (2)
K：The absorption coefficient of light；
L：The length of testing sample
Nd：Glass d lines (587.6nm) refractive index.
The measuring method of optical glass measurement apparatus, when 1000nm～1100nm haze measurements are carried out to testing sample,
The method is comprised the following steps：
1) high-accuracy stable light source is closed, opens standard reflecting plate, the mist degree testing sample frame at integrating sphere front window
Upper place infrared mist degree testing sample；
2) switching of 1000nm～1100nm laser instrument is placed in light path using light source switch, 1000nm～1100nm swashs
Light device is after Polarization Controller, then through variable optical attenuator, makes light intensity attenuation to the illumination that mates with indium gallium arsenide detector；
3) light beam is divided into two-way after spectroscope and the first deviation mirror by light beam, and all the way as reference light, another road is made
For flashlight, the ac modulation that chopper is that reference light and flashlight load different characteristic frequency is divided；
4) reference light is turned to through the second deviation mirror, flashlight after the testing sample on mist degree testing sample frame, two
Beam light is projected into integrating sphere simultaneously, and flashlight has segment beam to enter in light trapping, and remainder light intensity is I1Flashlight
It is I with light intensity2Reference light received by indium gallium arsenide detector, and be converted into voltage signal；
5) it is input in computer after dual pathways lock-in amplifier is by the filtering of voltage signal gain amplifier and calculates, passes through
Formula (3) is calculated the infrared mist degree of 1000nm～1100nm wave bands,
Mist degree=I1/I2(3).
The invention has the beneficial effects as follows：Using spectrophotometric dual-beam synchro measure principle, realize that reference light and sample are saturating
Measure while crossing light intensity, luminous power drift can be eliminated at all to measuring the impact of stability, while without the need for motor drive mechanism
Mechanical switch is carried out to sample；Have 400nm～700nm wave band absorption coefficients of light, 1000nm～1100nm absorption coefficients of light with
And 1000nm～1100nm haze measurement functions；Full-automatic one-touch measurement procedure, by pressing start button, instrument is automatically complete
Into measurement, calculate and display, without loaded down with trivial details setting, ultrahigh in efficiency；Optical electro-mechanical system global design, compact conformation are rationally, portable
Property strong, with excellent optical noise and electromagnetic noise shield effectiveness, it is adaptable to various environmental conditions, it is ensured that the overlength of instrument is used
Life-span and measurement stability, it is easy to test operation, and with higher measuring accuracy.
Description of the drawings
Fig. 1 is the schematic diagram of apparatus of the present invention.
Specific embodiment
As shown in figure 1, the optical glass measurement apparatus of the present invention are included successively by light path：There is system, double light in double light sources
Road system, Photodetection system and data handling system.
Wherein, double light sources generation systems are divided into two systems according to the parameter of measurement different-waveband, when to visible light wave range
When (400nm～700nm) carries out absorption coefficient of light measurement, which includes high-accuracy stable light source 1, collimating mirror 2, filter successively by light path
Mating plate 3 and reducing diaphragm 4；When the absorption coefficient of light and haze measurement is carried out to infrared band (1000nm～1100nm), which is pressed
Light path includes 1000nm～1100nm laser instrument 6 and Polarization Controller 7 successively.Above-mentioned two light-source system passes through light source switch
5 switching.
Double beam system includes variable optical attenuator 8, spectroscope 9, the first deviation mirror 10, frequency dividing chopper successively by light path
11st, the second deviation mirror 14, integrating sphere 15, standard reflecting plate 16 and light trapping 17, and frequency dividing chopper 11 and integrating sphere 15 it
Between be additionally provided with testing sample frame, the testing sample frame according to test parameter difference (absorption coefficient of light or mist degree) be divided into light suction
Receive testing sample frame 12 and mist degree testing sample frame 13.
Photodetection system is respectively adopted selenium cell spy according to test wave band difference (visible light wave range or infrared band)
Survey device 18 or indium gallium arsenide detector 19.
Data handling system includes dual pathways lock-in amplifier 20 and computer 21 by light path.
Above-mentioned high-accuracy stable light source 1 is the high-accuracy stable light source that optical fiber output simplifies light channel structure, can adopt colour temperature
Be the elegant 0.01, output wavelength that is less than of 2860K, light intensity for 400nm～700nm, light source of the stability up to 0.05%～0.1%；
The effect of collimating mirror 2 is to make center of the homogenizer by collimating mirror 2, and makes incident illumination outgoing in the form of directional light,
Which is may be provided at apart from 1 light path horizontal centre line back end of high-accuracy stable light source, and (rear end is the biography with light in the optical path
Direction is broadcast for standard, as follows) at 50mm～110mm；Optical filter 3 has the effect for filtering veiling glare, and which may be provided at distance
At 2 light path horizontal centre line back end 5mm of collimating mirror～10mm, when optical filter 3 adopts LB2 optical filters, with filtration visible ray
The effect of veiling glare beyond 400nm～700nm wave bands；Reducing diaphragm 4 forms light beam light hole footpath Point
Light source, its are may be provided at 3 light path horizontal centre line back end 50mm of optical filter～310mm；Light source switch 5 can be arranged
At 4 light path horizontal centre line back end 100mm of reducing diaphragm～110mm；1000nm～1100nm laser instrument 6 may be provided at
At light source switch 5 vertical centrage (for light path horizontal center line, as follows) 200mm～350mm；Polarization
Controller 7 is used for the polarization state of rotary laser, generally adopts 1/2nd wave plate of zero level, and some optical glass are in different polarization states
Under the conditions of transmitance can be different, the effect of Polarization Controller 7 is exactly the such sample detection of reply, and which may be provided at distance
At 6 light hole 5mm of 1000nm～1100nm laser instrument.
Above-mentioned variable optical attenuator 8 makes light intensity attenuation, and which is may be provided at apart from 4 light path horizontal centre line back end 5 of reducing diaphragm
At～10mm；Spectroscope 9 is placed at the rear end 5nm～10mm of variable optical attenuator 8, makes homogenizer be divided into two-beam, i.e.,：Water
Zero diopter and vertical light, its are may be provided at 8 light path horizontal centre line back end 100mm of variable optical attenuator～150mm；First turn
It is arranged at the vertical centrage 100mm～110mm of 9 light path of spectroscope, using 45 degree of angles to mirror 10；Frequency dividing chopper 11
For the ac modulation that two-beam loads different characteristic frequency, two AC signal frequencies set with dual pathways lock-in amplifier 20
Unanimously, the energy of two frequency signals can so be amplified by dual pathways lock-in amplifier 20, so as to reduce noise and dark
Impact of the electric current to detectable signal precision, frequency dividing chopper 11 may be provided at 10 rear end 50mm of spectroscope 9 and the first deviation mirror～
At 60mm, fan blade of the light beam through frequency dividing chopper 11；Second deviation mirror 14 may be provided at 10 light path water of the first deviation mirror
At flat center line back end 300mm～350mm；Light absorbs testing sample frame 12 is may be provided at apart from 9 light path horizontal centre of spectroscope
At line 100mm～110mm；Integrating sphere 15 is arranged on 12 rear end of light absorbs testing sample frame, and 15 front window of integrating sphere can be arranged
At 12 light path horizontal centre line back end 200mm of light absorbs testing sample frame～3000mm, 15 top window of integrating sphere can be arranged
At the vertical center line back end 100mm～110mm of 14 light path of the second deviation mirror；Mist degree testing sample frame 13 is arranged on integrating sphere 15
At front window, and can be located at 12 light path horizontal centre line back end 200mm of light absorbs testing sample frame～3000mm；Standard reflection
The coating material of plate 16 is identical with 15 internal reflection coating of integrating sphere, all can adopt magnesium oxide coating, and effect is to make light
Full transmitting is reached, when standard of closure reflecting plate 16, integrating sphere 15 is closed completely, and when standard reflecting plate 16 is opened, integration
Ball 15 has a little exit window, and after working as light entrance integrating sphere 15, some light can be entered from this exit window
To in light trapping 17, and remainder light, then in 15 internal reflection of integrating sphere, standard reflecting plate 16 may be provided at integrating sphere 15
Center rear wall position, slide downward angle are 1～10 degree；17 adjacent integrating sphere of light trapping, 15 rear side outer wall, its internal setting
There are some little prisms, organize L-shaped oxtail prism side by side, the incident beam of light trapping 17 is entered some by standard reflecting plate 16
Repeatedly turn back in little prism, with the effect for making light beam delayed reflex return integrating sphere 15.
Above-mentioned selenium cell detector 18 is embedded in the front end of 15 bottom windows of integrating sphere, make spectral region for 400nm～
The optical signal of 700nm is converted into voltage signal；Indium gallium arsenide detector 19 is embedded in the rear end of 15 bottom windows of integrating sphere, makes light
Spectral limit is converted into voltage signal for the optical signal of 1000nm～1100nm.
It is input into after the voltage signal gain amplifier filtering that Photodetection system is come by above-mentioned dual pathways lock-in amplifier 20
Calculate in computer 21 and show.
When measuring using assembly of the invention, following three situation can be divided into：
(1) when the measurement of visible light wave range (400nm～700nm) absorption coefficient of light is carried out to testing sample, of the invention
Measuring method is comprised the following steps：
1) length L of testing sample is measured with slide gauge, and testing sample is placed on light suction by standard of closure reflecting plate 16
Receive and be placed in light path on testing sample frame 12；
2) after collimating mirror 2, beam collimation is a branch of directional light to high-accuracy stable light source 1, filters through LB2 optical filters 3
After light, then by reducing diaphragm 4, make light beam light hole footpath that the circular light spot of 3～5mm is adjusted to according to testing requirement, then pass through
Variable optical attenuator 8, makes light intensity attenuation to the illumination that mates with selenium cell detector 18；
3) light beam is divided into two-way after spectroscope 9, the first deviation mirror 10 by light beam, all the way as reference light, another
Road as flashlight, meanwhile, divide the ac modulation that chopper 11 is that reference light and flashlight load different characteristic frequency；
4) reference light is turned to through the second deviation mirror 14, testing sample of the flashlight on light absorbs testing sample frame 12
Afterwards, two-beam is projected into integrating sphere 15 simultaneously, and selenium cell detector 18 receives the light of the visible light wave range of double light path simultaneously
Signal, and it is converted into voltage signal；
5) it is input in computer 21 after dual pathways lock-in amplifier 20 is by the filtering of voltage signal gain amplifier and calculates,
21 interface display reference light light intensity m of computer and flashlight light intensity m1, it is saturating that final computer 21 is calculated visible light wave range
Penetrate than T and visible ray coefficient of light absorption K, and pass through interface display.Wherein, T value is calculated by formula (1), and according to formula
(2) the visible ray coefficient of light absorption K of testing sample is obtained.
T=m1/m (1)
In formula：
T：The transmittance of sample；
m1：Flashlight light intensity；
m：Reference light light intensity；
K=1/L { 2ln [1- ((nd-1)/(nd+1))2]+ln[1+((nd-1)/(nd+1))4]-lnT} (2)
K：The absorption coefficient of light；
L：The length of testing sample
Nd：Glass d lines (587.6nm) refractive index.
(2) when the measurement of 1000nm～1100nm absorption coefficients of light is carried out to testing sample, the measuring method bag of the present invention
Include following steps：
1) measure length L of testing sample with slide gauge, close high-accuracy stable light source 1, standard of closure reflecting plate 16,
Testing sample is placed on light absorbs testing sample frame 12 and is placed in light path；
2) switching of 1000nm～1100nm laser instrument 6 is placed in light path using light source switch 5,1000nm～1100nm
Laser instrument 6 is through Polarization Controller 7, then after variable optical attenuator 8, light intensity attenuation is extremely mated with indium gallium arsenide detector 19
Illumination；
3) light beam is divided into two-way after spectroscope 9 and the first deviation mirror 10 by light beam, all the way as reference light, another
Road as flashlight, meanwhile, divide the ac modulation that chopper 11 is that reference light and flashlight load different characteristic frequency；
4) reference light is turned to through the second deviation mirror 14, testing sample of the flashlight on light absorbs testing sample frame 12
Afterwards, two-beam is projected into integrating sphere 15 simultaneously, and indium gallium arsenide detector 19 receives the optical signal of double light path simultaneously, and is converted into
Voltage signal；
5) it is input in computer 21 after dual pathways lock-in amplifier 20 is by the filtering of voltage signal gain amplifier and calculates,
21 interface display reference light light intensity m of computer and flashlight light intensity m1, final computer 21 be calculated 1000nm～
1100nm wavelength regions are than T and 1000nm～1100nm coefficient of light absorption Ks, and pass through interface display.Wherein, T value is by formula (1)
Calculate, and 1000nm～1100nm coefficient of light absorption Ks of testing sample are obtained according to formula (2).
(3) when the haze measurement of 1000nm～1100nm infrared bands is carried out to testing sample, the measurement side of the present invention
Method is comprised the following steps：
1) high-accuracy stable light source 1 is closed, takes down the testing sample on light absorbs testing sample frame 12, open standard reflection
Plate 16, places the infrared mist degrees of 1000nm～1100nm on the mist degree testing sample frame 13 at 15 front window of integrating sphere and treats test sample
Product；
2) switching of 1000nm～1100nm laser instrument 6 is placed in light path using light source switch 5,1000nm～1100nm
Laser instrument 6 is after Polarization Controller 7, then through variable optical attenuator 8, light intensity attenuation is extremely mated with indium gallium arsenide detector 19
Illumination；
3) light beam is divided into two-way after spectroscope 9 and the first deviation mirror 10 by light beam, all the way as reference light, another
Road as flashlight, meanwhile, divide the ac modulation that chopper 11 is that reference light and flashlight load different characteristic frequency；
4) reference light is turned to through the second deviation mirror 14, testing sample of the flashlight on mist degree testing sample frame 13
Afterwards, two-beam is simultaneously projected into integrating sphere 15, and flashlight has segment beam to enter opening angle to be in 5 degree of light trapping 17,
The light intensity that more than 5 degree of deviation incident illumination is I1Part signal light and light intensity be I2Reference light connect by indium gallium arsenide detector 19
Receive, and be converted into voltage signal；
5) it is input in computer 21 after dual pathways lock-in amplifier 20 is by the filtering of voltage signal gain amplifier and calculates,
Computer 21 is calculated the infrared mist degree of 1000nm～1100nm wave bands, and passes through interface display.Wherein, 1000nm～1100nm
Infrared mist degree is calculated by formula (3).
1000nm～1100nm mist degrees=I1/I2(3)
The all band absorption coefficient of light of the present invention and infrared haze measurement device, using high-accuracy stable light source 1, can be with
The unstability of incandescent light source in existing white light optical absorption measurement instrument is prevented effectively from, measuring accuracy is improved；Using spectrophotometric
Dual-beam synchro measure, measures while realizing that reference light and sample pass through light intensity, can eliminate luminous power drift at all right
The impact of measurement stability, while carry out mechanical switch without the need for motor drive mechanism to sample；In addition, present invention increase 1000nm～
1100nm laser instrument 6 and indium indium gallium arsenide detector 19, can increase standard with test sample in the absorbance value of infrared band
Reflecting plate 16 and light trapping 17, can test the mist degree of optical glass infrared band 1000nm～1100nm.
Claims (13)
1. optical glass measurement apparatus, it is characterised in that include by light path successively：
There is system in double light sources：Include high-accuracy stable light source (1), collimating mirror (2), optical filter (3) and reducing successively by light path
Diaphragm (4)；Or 1000nm～1100nm laser instrument (6) and Polarization Controller (7)；
Double beam system：Include variable optical attenuator (8), spectroscope (9), the first deviation mirror (10), frequency dividing copped wave successively by light path
Device (11), the second deviation mirror (14), integrating sphere (15), standard reflecting plate (16) and light trapping (17), and in frequency dividing chopper
(11) testing sample frame is additionally provided with and integrating sphere (15) between；
Photodetection system：Selenium cell detector (18) or indium gallium arsenide detector (19)；
Data handling system：Include dual pathways lock-in amplifier (20) and computer (21) by light path.
2. optical glass measurement apparatus as claimed in claim 1, it is characterised in that arrange between described pair of light source generation system
There are light source switch (5), described pair of light source system to occur and cuts by light source switch (5) according to the parameter of measurement different-waveband
Change.
3. optical glass measurement apparatus as claimed in claim 1, it is characterised in that the testing sample frame is according to test parameter
Difference is divided into light absorbs testing sample frame (12) or mist degree testing sample frame (13).
4. optical glass measurement apparatus as claimed in claim 1, it is characterised in that the Photodetection system is according to test waves
Duan Butong, is respectively adopted selenium cell detector (18) or indium gallium arsenide detector (19).
5. optical glass measurement apparatus as claimed in claim 1, it is characterised in that variable optical attenuator (8) make light intensity decline
Reduce to the illumination that mates with selenium cell detector (18) or indium gallium arsenide detector (19).
6. optical glass measurement apparatus as claimed in claim 1, it is characterised in that described frequency dividing chopper (11) are reference light
The ac modulation of different characteristic frequency is loaded with flashlight.
7. optical glass measurement apparatus as claimed in claim 1, it is characterised in that described mist degree testing sample frame (13) are arranged
At integrating sphere (15) front window.
8. optical glass measurement apparatus as claimed in claim 1, it is characterised in that standard reflecting plate (16) are arranged on product
Bulb separation (15) center rear wall position, slide downward angle are 1～10 degree.
9. optical glass measurement apparatus as claimed in claim 1, it is characterised in that light trapping (17) adjacent integrating sphere
(15) outer wall on rear side of, enters the incident beam of light trapping (17) some little ribs in the light trapping (17) by standard reflecting plate (16)
Repeatedly turn back in mirror, make light beam delayed reflex return integrating sphere (15).
10. optical glass measurement apparatus as claimed in claim 1, it is characterised in that selenium cell detector (18) and
Indium gallium arsenide detector (19) is embedded in integrating sphere (15) bottom windows.
The measuring method of 11. optical glass measurement apparatus, it is characterised in that when carrying out visible light wave range light absorbs to testing sample
When coefficient is measured, the method is comprised the following steps：
1) length L of testing sample is measured, and testing sample is placed on light absorbs testing sample frame by standard of closure reflecting plate (16)
(12) it is placed in light path on；
2) after collimating mirror (2), beam collimation is a branch of directional light to high-accuracy stable light source (1), filters through optical filter (3)
Afterwards, then by reducing diaphragm (4) light beam light hole footpath is adjusted, then through variable optical attenuator (8), makes light intensity attenuation extremely and selenium
The illumination that battery detector (18) mates；
3) light beam is divided into two-way after spectroscope (9), the first deviation mirror (10) by light beam, all the way as reference light, another
Road divides the ac modulation that chopper (11) is that reference light and flashlight load different characteristic frequency as flashlight；
4) reference light is turned to through the second deviation mirror (14), testing sample of the flashlight in light absorbs testing sample frame (12)
Afterwards, two-beam is projected into integrating sphere (15) simultaneously, and selenium cell detector (18) is while receive the visible light wave range of double light path
Optical signal, and be converted into voltage signal；
5) it is input in computer (21) after dual pathways lock-in amplifier (20) is by the filtering of voltage signal gain amplifier and calculates,
The visible ray coefficient of light absorption K that testing sample is obtained by formula (2),
K=1/L { 2ln [1- ((nd-1)/(nd+1))2]+ln[1+((nd-1)/(nd+1))4]-lnT} (2)
K：The absorption coefficient of light；
L：The length of testing sample
Nd：Glass d lines (587.6nm) refractive index.
The measuring method of 12. optical glass measurement apparatus, it is characterised in that when carrying out 1000nm～1100nm light to testing sample
When absorptance is measured, the method is comprised the following steps：
1) length L of testing sample is measured, high-accuracy stable light source (1) and standard reflecting plate (16) is closed, testing sample is put
Put and be placed in light path in light absorbs testing sample frame (12)；
2) 1000nm～1100nm laser instrument (6) switching is placed in light path using light source switch (5), 1000nm～1100nm
Laser instrument (6) through Polarization Controller (7), then after variable optical attenuator (8), make light intensity attenuation to indium gallium arsenide detector
(19) illumination that mates；
3) light beam is divided into two-way after spectroscope (9) and the first deviation mirror (10) by light beam, all the way as reference light, another
Road divides the ac modulation that chopper (11) is that reference light and flashlight load different characteristic frequency as flashlight；
4) reference light is turned to through the second deviation mirror (14), testing sample of the flashlight in light absorbs testing sample frame (12)
Afterwards, two-beam is projected into integrating sphere (15) simultaneously, and indium gallium arsenide detector (19) is while receive the optical signal of double light path, and turn
Turn to voltage signal；
5) it is input in computer (21) after dual pathways lock-in amplifier (20) is by the filtering of voltage signal gain amplifier and calculates,
1000nm～1100nm coefficient of light absorption Ks that testing sample is obtained by formula (2),
K=1/L { 2ln [1- ((nd-1)/(nd+1))2]+ln[1+((nd-1)/(nd+1))4]-lnT} (2)
K：The absorption coefficient of light；
L：The length of testing sample
Nd：Glass d lines (587.6nm) refractive index.
The measuring method of 13. optical glass measurement apparatus, it is characterised in that when carrying out 1000nm～1100nm mists to testing sample
During degree measurement, the method is comprised the following steps：
1) high-accuracy stable light source (1) is closed, opens standard reflecting plate (16), the mist degree at integrating sphere (15) front window is to be measured
Specimen holder (13) is upper to place infrared mist degree testing sample；
2) 1000nm～1100nm laser instrument (6) switching is placed in light path using light source switch (5), 1000nm～1100nm
Laser instrument (6) after Polarization Controller (7), then through variable optical attenuator (8), make light intensity attenuation to indium gallium arsenide detector
(19) illumination that mates；
3) light beam is divided into two-way after spectroscope (9) and the first deviation mirror (10) by light beam, all the way as reference light, another
Road divides the ac modulation that chopper (11) is that reference light and flashlight load different characteristic frequency as flashlight；
4) reference light is turned to through the second deviation mirror (14), testing sample of the flashlight on mist degree testing sample frame (13)
Afterwards, two-beam is projected into integrating sphere (15) simultaneously, and flashlight has segment beam to enter in light trapping (17), remainder light intensity
For I1Flashlight and light intensity be I2Reference light received by indium gallium arsenide detector (19), and be converted into voltage signal；
5) it is input in computer (21) after dual pathways lock-in amplifier (20) is by the filtering of voltage signal gain amplifier and calculates,
The infrared mist degree of 1000nm～1100nm wave bands is calculated by formula (3),
Mist degree=I1/I2(3).
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