CN206095927U - Optical glass light absorption measuring device - Google Patents
Optical glass light absorption measuring device Download PDFInfo
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- CN206095927U CN206095927U CN201621162993.3U CN201621162993U CN206095927U CN 206095927 U CN206095927 U CN 206095927U CN 201621162993 U CN201621162993 U CN 201621162993U CN 206095927 U CN206095927 U CN 206095927U
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Abstract
The utility model provides an optical glass light absorption measuring device includes according to the light path in proper order: two light source emergence systems: include high accuracy stabilized light source, collimating mirror, light filter and reducing diaphragm in proper order according to the light path, or 1000nm~1100nm laser instrument and polarization controller, the double -light -path system: include in proper order according to the light path that intensity attenuation ware, spectroscope, the first mirror, frequency division chopper, second of turning to turn to mirror and total mark ball, and still be provided with light absorption need checking sample frame between frequency division chopper and total mark ball, photodetection system: selenium cell detector or indium gaAs detector, data process system: include binary channels lock -in amplifier and computer according to the light path. The utility model discloses a spectrophotometry dualbeam synchronous measurement principle realizes that reference light and sample see through the simultaneous measurement of luminous intensity, can eliminate the luminous power at all and drift about to stability of measuring tool's influence, and easily test operating just has higher measuring accuracy.
Description
Technical field
The utility model is related to a kind of measurement apparatus of optical glass, more particularly to a kind of light absorbs to optical glass
Coefficient high-precision automatic measurement device.
Background technology
The absorption coefficient of light of optical glass is the important indicator in optical glass parameter, and in recent years with infrared product
Extensive application of the product in security protection, vehicle-mounted market, the infrared part absorption coefficient of light is particularly important.Only may be used both at home and abroad at present
The determination of light absorption instrument of optical band (400nm～700nm) is seen, as shown in figure 1, the light sent by incandescent lamp 31 passes through different saturating
Penetrate than optical filter 32 after, determine the corrected value of reading.The position of integrating sphere 36 and the aperture of iris 33 are adjusted, light is made
Beam is fully radiated to the window of integrating sphere 36, and reads data.Lifting device lid, takes the sample 35 on specimen holder 34 away, carries out sky
Survey and record data.Data measured is substituted in light absorbs Absorption Formula and calculates result.The structure has following asking
Topic：1) light channel structure is fairly simple, needs frequently to open cover manually to remove sample and carry out again empty survey, is then input into computer
Calculate the absorption coefficient of light, environment and the factor interference such as artificial are big, and certain impact is caused on measuring accuracy；2) light source is white heat
Lamp, its stability can bring impact to final measuring accuracy.
And for the relevant apparatus that the light absorbs of infrared band are tested also belong to blank.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of high-acruracy survey optical glass absorption coefficient of light
Device.
The utility model solves the technical scheme that adopted of technical problem：Optical glass optical absorption measurement device, by light
Road includes successively：
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 instruments and Polarization Controller；
Double beam system：By light path successively include variable optical attenuator, spectroscope, the first deviation mirror, frequency dividing chopper, second
Deviation mirror and integrating sphere, and it is additionally provided with light absorbs testing sample frame between frequency dividing chopper and integrating sphere；
Photodetection system：Selenium cell detector or indium gallium arsenide detector；
Data handling system：Include binary channels lock-in amplifier and computer by light path.
Further, light source switch is provided between described pair of light source generation system, described pair of light source occurs system and press
Switched by light source switch according to the parameter of measurement different-waveband.
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 matching.
Further, the frequency dividing chopper is the AC modulation that reference light and flashlight load different characteristic frequency.
Further, the selenium cell detector and indium gallium arsenide detector are embedded in integrating sphere bottom windows.
Further, the optical filter adopts LB2 optical filters.
The beneficial effects of the utility model are：Using spectrophotometric dual-beam synchro measure principle, reference light and sample are realized
Product are measured while passing through luminous intensity, can at all eliminate the impact that luminous power is drifted about to measuring stability, while without the need for electronic
Mechanism carries out mechanical switch to sample；With 400nm～700nm, 1000nm～1100nm wave bands absorption coefficient of light measurement function；
Full-automatic one-touch measurement procedure, by pressing start button, instrument is automatically performed measurement, calculates and show, sets without loaded down with trivial details
Put, ultrahigh in efficiency；Optical electro-mechanical system global design, rationally, portability is strong, makes an uproar with excellent optical noise and electromagnetism for compact conformation
Acoustic shielding effect, it is adaptable to various environmental conditions, it is ensured that the long service life and measurement stability of instrument, it is easy to test behaviour
Make, and with higher measuring accuracy.
Description of the drawings
Fig. 1 is the structural representation of existing optical absorption measurement instrument.
Fig. 2 is the schematic diagram of the utility model device.
Specific embodiment
As shown in Fig. 2 optical glass optical absorption measurement device of the present utility model is included successively by light path：Double light sources occur
System, double beam 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, it presses light path includes successively high-accuracy stable light source 1, collimating mirror 2, filter
Mating plate 3 and reducing diaphragm 4；When infrared band (1000nm～1100nm) is carried out the absorption coefficient of light measure when, its press light path according to
It is secondary including 1000nm～1100nm laser instruments 6 and Polarization Controller 7.Above-mentioned two light-source system is cut by light source switch 5
Change.
Double beam system includes successively variable optical attenuator 8, spectroscope 9, the first deviation mirror 10, frequency dividing chopper by light path
11st, the second deviation mirror 14 and integrating sphere 15, and be additionally provided with light absorbs and treat test sample between frequency dividing chopper 11 and integrating sphere 15
Product frame 12.
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 binary channels 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
0.01, output wavelength is less than for 400nm～700nm, light source of the stability up to 0.05%～0.1% for 2860K, light intensity are elegant；
The effect of collimating mirror 2 is center of the homogenizer by collimating mirror 2, and makes incident light outgoing in the form of directional light, its
May be provided at apart from the light path horizontal centre line back end of high-accuracy stable light source 1 that (rear end is the propagation with light in the optical path
Direction is standard, as follows) at 50mm～110mm；Optical filter 3 has the effect for filtering veiling glare, and it is accurate that it may be provided at distance
At the straight light path horizontal centre line back end 5mm of mirror 2～10mm, 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 footpathPoint
Light source, it may be provided at the light path horizontal centre line back end 50mm of optical filter 3～310mm；Light source switch 5 can be arranged
At the light path horizontal centre line back end 100mm of reducing diaphragm 4～110mm；1000nm～1100nm laser instruments 6 may be provided at
At vertical center line (for light path horizontal center line, the as follows) 200mm～350mm of light source switch 5；Polarization
Controller 7 is used for the polarization state of rotary laser, generally adopts the wave plate of zero level 1/2nd, 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 sample detection as reply, and it may be provided at distance
At the light hole 5mm of 1000nm～1100nm laser instruments 6.
Above-mentioned variable optical attenuator 8 makes light intensity attenuation, and it may be provided at apart from the light path horizontal centre line back end 5 of reducing diaphragm 4
At～10mm；Spectroscope 9 is placed at the 5～10mm of rear end of variable optical attenuator 8, and makes homogenizer be divided into two-beam, i.e.,：Water
Zero diopter and vertical light, it may be provided at the light path horizontal centre line back end 100mm of variable optical attenuator 8～150mm；First turn
It is arranged at the vertical center line 100mm～110mm of the light path of spectroscope 9, 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 with the setting of binary channels lock-in amplifier 20
Unanimously, the energy of two frequency signals so can be amplified by binary channels 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 the rear end 50mm of 9 and first deviation mirror of spectroscope 10～
At 60mm, fan blade of the light beam through frequency dividing chopper 11；Second deviation mirror 14 may be provided at the light path water of the first deviation mirror 10
At flat center line back end 300mm～350mm；Light absorbs testing sample frame 12 may be provided at apart from the light path horizontal centre of spectroscope 9
At line 100mm～110mm；Integrating sphere 15 is arranged on the rear end of light absorbs testing sample frame 12, and the front window of integrating sphere 15 can be arranged
At the light path horizontal centre line back end 100mm of light absorbs testing sample frame 12～110mm, the top window of integrating sphere 15 may be provided at
At the vertical center line back end 100mm～110mm of the light path of second deviation mirror 14.
Above-mentioned selenium cell detector 18 is embedded in the front end of the bottom windows of integrating sphere 15, 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 the bottom windows of integrating sphere 15, makes light
Spectral limit is converted into voltage signal for the optical signal of 900nm～1100nm.
It is input into after the voltage signal gain amplifier filtering that above-mentioned binary channels lock-in amplifier 20 comes Photodetection system
Calculate in computer 21 and show.
When measuring using device of the present utility model, following two kinds of situations 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, measuring method
Comprise the following steps：
1) length L of testing sample is measured with slide measure, testing sample is placed on light absorbs testing sample frame 12
In being placed in light path；
2) after collimating mirror 2, beam collimation is a branch of directional light to high-accuracy stable light source 1, is filtered 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 matched with selenium cell detector 18；
3) light beam is divided into two-way by light beam after spectroscope 9, the first deviation mirror 10, another all the way as reference light
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 binary channels lock-in amplifier 20 is by the filtering of voltage signal gain amplifier and calculates,
Interface display reference light light intensity m of computer 21 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 by interface display.Wherein, T values are 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, measuring method includes following step
Suddenly：
1) length L of testing sample is measured with slide measure, high-accuracy stable light source 1 is closed, testing sample is placed on
It is placed in light path on light absorbs testing sample frame 12；
2) switching of 1000nm～1100nm laser instruments 6 is placed in light path using light source switch 5,1000nm～1100nm
Laser instrument 6 makes light intensity attenuation extremely match with indium gallium arsenide detector 19 through Polarization Controller 7, then after variable optical attenuator 8
Illumination；
3) light beam is divided into two-way by light beam after the deviation mirror 10 of spectroscope 9 and first, another all the way as reference light
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 binary channels lock-in amplifier 20 is by the filtering of voltage signal gain amplifier and calculates,
Interface display reference light light intensity m of computer 21 and flashlight light intensity m1, final computer 21 be calculated 1000nm～
1100nm wavelength regions than T and 1000nm～1100nm coefficient of light absorption Ks, and by interface display.Wherein, T values are by formula (1)
Calculate, and 1000nm～1100nm coefficient of light absorption Ks of testing sample are obtained according to formula (2).
All band absorption coefficient of light measurement apparatus of the present utility model, using high-accuracy stable light source 1, can be prevented effectively from
The unstability of incandescent light source in existing white light optical absorption measurement instrument, improves measuring accuracy；It is same using spectrophotometric dual-beam
Pacing amount, measures while realizing that reference light and sample pass through luminous intensity, can at all eliminate luminous power drift stable to measurement
The impact of property, while carrying out mechanical switch to sample without the need for motor drive mechanism；In addition, the utility model increases 1000nm～1100nm
Laser instrument 6 and indium indium gallium arsenide detector 19, can with test sample infrared band absorbance value.
Claims (6)
1. optical glass optical absorption measurement device, it is characterised in that include successively by light path：
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 instruments (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) and integrating sphere (15), and be additionally provided between frequency dividing chopper (11) and integrating sphere (15)
Light absorbs testing sample frame (12)；
Photodetection system：Selenium cell detector (18) or indium gallium arsenide detector (19)；
Data handling system：Include binary channels lock-in amplifier (20) and computer (21) by light path.
2. optical glass optical absorption measurement device as claimed in claim 1, it is characterised in that the described pair of light source occur system it
Between be provided with light source switch (5), there is system and pass through light source switch according to the parameter of measurement different-waveband in described pair of light source
(5) switch.
3. optical glass optical absorption measurement device as claimed in claim 1, it is characterised in that the Photodetection system according to
Test wave band is different, and selenium cell detector (18) or indium gallium arsenide detector (19) is respectively adopted.
4. optical glass optical absorption measurement device as claimed in claim 1, it is characterised in that the variable optical attenuator (8) makes
Light intensity attenuation is to the illumination matched with the selenium cell detector (18) or indium gallium arsenide detector (19).
5. optical glass optical absorption measurement device as claimed in claim 1, it is characterised in that the frequency dividing chopper (11) is
Reference light and flashlight load the AC modulation of different characteristic frequency.
6. optical glass optical absorption measurement device as claimed in claim 1, it is characterised in that the optical filter (3) adopts LB2
Optical filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621162993.3U CN206095927U (en) | 2016-10-25 | 2016-10-25 | Optical glass light absorption measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621162993.3U CN206095927U (en) | 2016-10-25 | 2016-10-25 | Optical glass light absorption measuring device |
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| Publication Number | Publication Date |
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| CN206095927U true CN206095927U (en) | 2017-04-12 |
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| CN201621162993.3U Active CN206095927U (en) | 2016-10-25 | 2016-10-25 | Optical glass light absorption measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374552A (en) * | 2018-11-23 | 2019-02-22 | 国家海洋局第二海洋研究所 | A kind of water body absorption coefficient measuring device based on segmentation optical path |
-
2016
- 2016-10-25 CN CN201621162993.3U patent/CN206095927U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374552A (en) * | 2018-11-23 | 2019-02-22 | 国家海洋局第二海洋研究所 | A kind of water body absorption coefficient measuring device based on segmentation optical path |
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