CN208751830U - A kind of detection device of transmitance and reflectivity - Google Patents
A kind of detection device of transmitance and reflectivity Download PDFInfo
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- CN208751830U CN208751830U CN201821344784.XU CN201821344784U CN208751830U CN 208751830 U CN208751830 U CN 208751830U CN 201821344784 U CN201821344784 U CN 201821344784U CN 208751830 U CN208751830 U CN 208751830U
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Abstract
The utility model discloses the detection devices of a kind of transmitance and reflectivity, including beam shaping lens, spectroscope, the first photodetector and the second photodetector；Beam shaping lens and spectroscope are set gradually along the incident light direction of light, and the first photodetector is located on spectroscopical projecting light path, and the second photodetector is located on spectroscopical reflected light path.The detection device of the utility model transmitance and reflectivity, the detection to plane component transmissivity and reflectivity can be realized, can also realize the detection to curved surface elements transmissivity and reflectivity, and without accompanying plating piece, greatly reduce coating cost, when plated film no longer needs additional plane to accompany plating piece；Further, the application can also work in all band.
Description
Technical field
The utility model relates to the detection devices of a kind of transmitance and reflectivity, belong to optical element quality testing field.
Background technique
The radiation energy of object reflection accounts for the percentage of total radiation energy, referred to as reflectivity, the reflectivity of different objects
Difference, this depends primarily on the property (surface appearance) of object itself, and the wavelength and incident angle of incident inductance wave；Transmission
It is outgoing phenomenon of the incident light after refracting through object, in order to indicate that the transparent body penetrates the degree of light, usually with after transmission
Luminous flux and the ratio between incident flux τ characterize the light transmitting property of object, τ is known as light transmission.Reflectivity and transmissivity is
The important performance indexes of optical mirror slip are used to detect the transmitance of optical element at present both at home and abroad or the equipment of reflectivity are all
Can only test plane element, cannot still detect optical lens with curved surface.
Existing associated assay devices on the market are all single-range detection devices simultaneously, according to the ultraviolet of 200~400nm
Light area, the visible region of 400~760nm and 2.5~25 μm of infrared light district different requirements, different detections need to be equipped with
Equipment promotes testing cost significantly.
Utility model content
In order to solve that the defect of optical lens with curved surface reflectivity and transmissivity, the utility model cannot be detected in the prior art
The detection device of a kind of transmitance and reflectivity is provided.
In order to solve the above technical problems, technical solution used by the utility model is as follows:
A kind of detection device of transmitance and reflectivity, including beam shaping lens, spectroscope, the first photodetector and
Second photodetector；Beam shaping lens and spectroscope are set gradually along the incident light direction of light, and the first photodetector is set
On spectroscopical projecting light path, the second photodetector is located on spectroscopical reflected light path.
Beam shaping lens can realize the functions such as the expanding of light beam, shaping.
Beam shaping lens and spectroscope is set gradually along the incident light direction of light namely incident light first passes through beam shaping
After lens, spectroscope is entered back into, reflected into spectroscopical light a part, form spectroscopical reflected light path, a part of quilt
It projects, form spectroscopical projecting light path.
Incident light is divided into two by the detection device of above-mentioned transmitance and reflectivity using spectroscope, is used as reference all the way
Optical path, another way are as optical system for testing.
Incident light is divided into two by the above method, so that measurement result has the irrelevance of time, is joined using dual-beam
Transmitance, reflectivity than method measurement optical element.
The application device is suitable for the transmitance of plane and optical lens with curved surface and the detection of reflectivity, can be in work under all band
Make.
For above-mentioned detection device incident light after beam shaping lens shaping, the mirror that is split is divided into two-way, is all the way spectroscope
Projecting light path, be all the way spectroscopical reflected light path, the light in projecting light path eventually enters into the first photodetector, reflected light
Light in road eventually enters into the second photodetector.
In order to improve the accuracy of test, the angle between spectroscopical mirror surface and the central axis of beam shaping lens is
45°
In order to further increase the accuracy of test, along the incident direction of light, beam shaping lens include successively connecting
First lens, the second lens, the third lens and the 4th lens；The center spacing of first lens and the second lens is zero；Second thoroughly
The center spacing of mirror and the third lens is 5-6mm；The third lens and the center spacing of the 4th lens are 5-6mm.
The center spacing of the application refers to the distance between the center of two adjacent surfaces of adjacent two lens.
Further preferably, along the incident direction of light, the first lens include opposite first surface and the second curved surface, and second thoroughly
Mirror includes opposite third curved surface and the 4th curved surface, and the third lens include opposite the 5th curved surface and the 6th curved surface, the 4th lens
Including the 7th opposite curved surface and the 8th curved surface；The radius of curvature of first surface is -28.2 millimeters, the radius of curvature of the second curved surface
It is 25.5 millimeters, the center thickness of the first lens is 4.5 millimeters；The radius of curvature of third curved surface is 100.3 millimeters, the 4th curved surface
Radius of curvature be -12.6 millimeters, the center thickness of the second lens is 5 millimeters；The radius of curvature of 5th curved surface is -35.6 millis
Rice, the radius of curvature of the 6th curved surface are -150.73 millimeters, and the center thickness of the third lens is 2 millimeters；The curvature of 7th curved surface half
Diameter is 80.04 millimeters, and the radius of curvature of the 8th curved surface is -30.6 millimeters, and the center thickness of the 4th lens is 4 millimeters.
The application center thickness refers to the thickness at lens centre.
A kind of detection method of transmitance and reflectivity will be to be measured using the detection device of above-mentioned transmitance and reflectivity
Element is placed in optical system for testing and is tested.
When detection, incident ray after beam shaping lens shaping, a part be split mirror projection, formed transmitted light path,
A part be split mirror reflection, formed reflected light path；Element under test is placed in the projection between spectroscope and the first photodetector
In optical path, the light in transmitted light path is received after element under test projects or reflects by the first photodetector, this is all the way as survey
Measure light intensity；Light in reflected light path is received by the second photodetector, this is all the way as with reference to light intensity.
The application can also be using transmitted light path as light intensity is referred to, using reflected light path as measurement light intensity.
As common sense, photodetector includes photocell, Transimpedance amplifier etc., and the photodetector of the application directly makes
With existing commercial product, after photodetector receives light, amplified respectively by mutual resistance by the photoelectric current that photocell exports
Circuit linearity is converted into voltage, then can carry out analog-to-digital conversion by onboard ADC, be calculated by embedded MCU and inputed to again
PC machine shows that those skilled in the art combine present context and the prior art unquestionable can reproduce.Certainly,
The application can also calculate transmissivity and reflectivity by directly reading the voltage data of photodetector.
When measurement, by adjusting the position of element under test and the position of the first photodetector, measurement is realized.Measurement
When transmissivity, the transmitted ray that the first photodetector in projecting light path need to be only rotated to original part to be measured can be by the first photoelectricity
Detector directly receives；When measuring reflectivity, element under test cannot be parallel or vertical with reflected light path, namely to guarantee point
The transmission luminous energy that light microscopic comes out is reflected by element under test, and angle of reflection is not 90 °, the first photodetector in projecting light path
The reflection light for rotating to original part to be measured can directly be received by the first photodetector.It is preferred that when measurement transmissivity, it is to be measured
For element perpendicular to projecting light path, the light of the mirror that is split projection enters the first photodetector after element under test projects；Measurement
When reflectivity, element under test rotates clockwise from the position perpendicular to projecting light path, and mobile first photodetector makes to be divided
The light of light microscopic projection enters the first photodetector after element under test reflects.
Position when relative to measurement transmissivity, when measuring reflectivity, the position of the first photodetector rotates counterclockwise
The angle of 180-2.
In measurement process, the first photodetector and the second photodetector can have the stroke of -50~50mm.So just
In all light energies of collection.
If incident ray light intensity value is P, photronic output current value and its of photodetector receive light intensity value at just
Than then the photocell output electric current of the first photodetector is represented by I1=K1 × T points × P, the light of the second photodetector
Cell output current is represented by I2=K2 × R points × P, wherein K1, K2 are respectively that the first photodetector and the second photoelectricity are visited
Photocell light intensity/photoelectric current linear transformation factor of device is surveyed, T points are spectroscope transmissivities, and R points are light splitting specular reflectivities, and P is light
The light intensity in source, photocell export electric current after Transimpedance amplifier Linear Amplifer, export a voltage signal, and the first photoelectricity is visited
Survey device output voltage signal V1=I1 × Rf1, second photodetector output voltage signal V2=I2 × Rf2, wherein Rf1,
Rf2 is respectively the Transimpedance amplifier current/voltage linear transformation factor of projecting light path and reflected light path, is commonly called as amplification factor.
Preferably, projection ratio is tested with the following method:
1) adjustment optical path: not being put into eyeglass to be measured, makes the hot spot of the light in projecting light path and reflected light path respectively can be into
Enter to the first photodetector and the second photodetector, is just produced in this way on the first photodetector and the second photodetector
Corresponding photovoltage has been given birth to, the signal value on the first photodetector and the second photodetector is calculated separately, it is assumed that is incident
The light intensity of light is P, then obtains following result:
Output voltage signal V1 beginning=Rf1 × K1 × T of first photodetector points × P； (2-1)
Output voltage signal V2 beginning=Rf2 × K2 × R of second photodetector points × P； (2-2)
T and R is spectroscopical transmissivity and reflectivity respectively, and K1 and K2 are respectively the first photodetector and the second photoelectricity
The photocell light intensity of the detector/photoelectric current linear transformation factor；Rf1 and Rf2 distinguishes the first photodetector and the second photoelectricity
The amplification factor of detector；
2) it will be measured in projecting light path that element under test is placed between spectroscope and the first photodetector, if tested
The transmitance of sample is T ', keeps the photocell spiral arm of the first photodetector of projecting light path motionless, connects it completely
The transmitted light of element under test is received, then the output voltage signal of the first photodetector and the second photodetector is acquired,
If the fluctuation factor of incident light be α, then α times when the light intensity value of incident light is signal acquisition in step 1) at this time, then:
The output voltage signal V1 of first photodetector thoroughly=Rf1 × K1 × T ' × T points × source P × α； (2-3)
The output voltage signal V2 of second photodetector thoroughly=Rf2 × K2 × R points × source P × α； (2-4)
Transmissivity T '=(V1 thoroughly/V2 saturating)/(V1 beginning/V2 begins) (2-5)；
By above-mentioned formula 2-1, formula 2-2, formula 2-3, formula 2-4 substitutes into formula 2-5, can clearly find out, the light-intensity variation of incident light
To measurement result substantially without any influence, because fluctuation factor-alpha is disappeared in calculating process.
It is preferred that reflectivity is tested with the following method:
1) adjustment optical path: not being put into eyeglass to be measured, makes the hot spot of the light in projecting light path and reflected light path respectively can be into
Enter to the first photodetector and the second photodetector, is just produced in this way on the first photodetector and the second photodetector
Corresponding photovoltage has been given birth to, the signal value on the first photodetector and the second photodetector is calculated separately, it is assumed that is incident
The light intensity of light is P, then obtains following result:
Output voltage signal V1 beginning=Rf1 × K1 × T of first photodetector points × P；
Output voltage signal V2 beginning=Rf2 × K2 × R of second photodetector points × P；
T and R is spectroscopical transmissivity and reflectivity respectively, and K1 and K2 are respectively the first photodetector and the second photoelectricity
The photocell light intensity of the detector/photoelectric current linear transformation factor；Rf1 and Rf2 distinguishes the first photodetector and the second photoelectricity
The amplification factor of detector；
2) it will be measured in projecting light path that element under test is placed between spectroscope and the first photodetector, if tested
The anti-rate of crossing of sample is R ', adjusts the position of the first photodetector in projecting light path, makes the photocell of the first photodetector
The reflected light of element under test, then the output voltage signal to the first photodetector and the second photodetector can be received completely
Be acquired, if the fluctuation factor of incident light is α, then when incident light α times when being signal acquisition in step 1) of light intensity value,
Then:
The output voltage signal V1 of first photodetector is anti-=Rf1 × K1 × R ' × T points × source P × α；
The output voltage signal V2 of second photodetector is anti-=Rf2 × K2 × R points × source P × α；
Reflectivity R '=(V1 anti-/V2 anti-)/(V1 beginning/V2 begins).
When being measured using the application method, without accompanying plating piece.
The unmentioned technology of the utility model is referring to the prior art.
The detection device of the utility model transmitance and reflectivity can be realized to plane component transmissivity and reflectivity
Detection can also realize the detection to curved surface elements transmissivity and reflectivity, and without accompanying plating piece, substantially reduce coating cost, plate
Additional plane is no longer needed to accompany plating piece when film；Further, the application can work in all band.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the detection device of the utility model transmitance and reflectivity；
Fig. 2 is transmissivity test schematic diagram；
Fig. 3 is reflectance test schematic diagram；
In figure, 1 be the first lens, 2 be the second lens, 3 be the third lens, 4 be the 4th lens, 5 be light inlet, 6 for point
Light microscopic, 7 be transmitted light path, 8 be reflected light path, 9 be the first photodetector, 10 be the second photodetector, 11 be member to be measured
Part, 12 for incident light, four-headed arrow indicate position it is adjustable；
Specific embodiment
The utility model in order to better understand furthers elucidate the content of the utility model below with reference to embodiment, but
The content of the utility model is not limited solely to the following examples.
Embodiment 1
The detection device of transmitance and reflectivity as shown in Figs. 1-3, including beam shaping lens, spectroscope, the first light
Electric explorer (PMT) and the second photodetector (PMT)；Beam shaping lens and spectroscope are successively set along the incident light direction of light
It sets, the first photodetector is located on spectroscopical projecting light path, and the second photodetector is located on spectroscopical reflected light path；
Angle between spectroscopical mirror surface and the central axis of beam shaping lens is 45 °；
Along the incident direction of light, beam shaping lens include the first lens successively to connect, the second lens, the third lens and
4th lens；The center spacing of first lens and the second lens is zero；The center spacing of second lens and the third lens is
5.5mm；The third lens and the center spacing of the 4th lens are 5.5mm.
Along the incident direction of light, the first lens include opposite first surface and the second curved surface, and the second lens include opposite
Third curved surface and the 4th curved surface, the third lens include opposite the 5th curved surface and the 6th curved surface, and the 4th lens include opposite
7th curved surface and the 8th curved surface；The radius of curvature of first surface is -28.2 millimeters, and the radius of curvature of the second curved surface is 25.5 millis
Rice, the center thickness of the first lens are 4.5 millimeters；The radius of curvature of third curved surface is 100.3 millimeters, the curvature half of the 4th curved surface
Diameter is -12.6 millimeters, and the center thickness of the second lens is 5 millimeters；The radius of curvature of 5th curved surface is -35.6 millimeters, and the 6th is bent
The radius of curvature in face is -150.73 millimeters, and the center thickness of the third lens is 2 millimeters；The radius of curvature of 7th curved surface is 80.04
Millimeter, the radius of curvature of the 8th curved surface are -30.6 millimeters, and the center thickness of the 4th lens is 4 millimeters.When test, incident light light
The distance of source to the 8th center of surface is 100.0171 millimeters.
The application center thickness refers to the thickness at lens centre.
The detection method of reflectivity and transmissivity are as follows: after beam shaping lens shaping, a part is split incident ray
Mirror projection, formed transmitted light path, a part be split mirror reflection, formed reflected light path；Element under test is placed in spectroscope and first
In projecting light path between photodetector, the light in transmitted light path is after element under test projects or reflects by the first photodetection
Device receives, this is all the way as measurement light intensity；Light in reflected light path is received by the second photodetector, this is used as reference light all the way
By force.
When measurement, by the position through the position and the first photodetector for adjusting element under test, measurement is realized.
When measuring transmissivity, the transmitted ray that only the first photodetector in projecting light path need to be rotated to original part to be measured can be by first
Photodetector directly receives；When measuring reflectivity, element under test cannot be parallel or vertical with reflected light path, namely to protect
The transmission luminous energy that card spectroscope comes out is reflected by element under test, and angle of reflection is not 90 °, and the first photoelectricity in projecting light path is visited
The reflection light that survey device rotates to original part to be measured can directly be received by the first photodetector.It is preferred that when measurement transmissivity,
For element under test perpendicular to projecting light path, the light of the mirror that is split projection enters the first photodetector after element under test projects；
When measuring reflectivity, element under test rotates clockwise from the position perpendicular to projecting light path, and mobile first photodetector makes
The light of the mirror that is split projection enters the first photodetector after element under test reflects.Position when relative to measurement transmissivity
It sets, when measuring reflectivity, the position of the first photodetector has rotated the angle of 180-2 counterclockwise.
In measurement process, the first photodetector and the second photodetector can have the stroke of -50~50mm.So just
In all light energies of collection.Photodetector directly uses existing commercial product, and as common sense, photodetector includes photoelectricity
Pond, Transimpedance amplifier etc., after photodetector receives light, by the photoelectric current of photocell output respectively by Transimpedance amplifier
Linear transfor is voltage, can directly read data, can also carry out modulus by onboard ADC (binary channels can be converted simultaneously) and turn
It changes, is calculated by embedded STM32MCU and input to PC machine again and show.
The specific test method is as follows for projection ratio:
1) adjustment optical path: not being put into eyeglass to be measured, makes the hot spot of the light in projecting light path and reflected light path respectively can be into
Enter to the first photodetector and the second photodetector, is just produced in this way on the first photodetector and the second photodetector
Corresponding photovoltage has been given birth to, the signal value on the first photodetector and the second photodetector is calculated separately, it is assumed that is incident
The light intensity of light is P, then obtains following result:
Output voltage signal V1 beginning=Rf1 × K1 × T of first photodetector points × P； (2-1)
Output voltage signal V2 beginning=Rf2 × K2 × R of second photodetector points × P； (2-2)
T and R is spectroscopical transmissivity and reflectivity respectively, and K1 and K2 are respectively the first photodetector and the second photoelectricity
The photocell light intensity of the detector/photoelectric current linear transformation factor；Rf1 and Rf2 distinguishes the first photodetector and the second photoelectricity
The amplification factor of detector；T, R, K1, K2, Rf1 and Rf2 are known parameters；
2) it will be measured in projecting light path that element under test is placed between spectroscope and the first photodetector, if tested
The transmitance of sample is T ', keeps the photocell spiral arm of the first photodetector of projecting light path motionless, connects it completely
The transmitted light of element under test is received, then the output voltage signal of the first photodetector and the second photodetector is acquired,
If the fluctuation factor of incident light be α, then α times when the light intensity value of incident light is signal acquisition in step 1) at this time, then:
The output voltage signal V1 of first photodetector thoroughly=Rf1 × K1 × T ' × T points × source P × α； (2-3)
The output voltage signal V2 of second photodetector thoroughly=Rf2 × K2 × R points × source P × α； (2-4)
Transmissivity T '=(V1 thoroughly/V2 saturating)/(V1 beginning/V2 begins) (2-5)；
Namely the transmissivity of element under test can directly be calculated by the voltage value that two steps are read.
Similarly, the specific test method is as follows for reflectivity:
1) adjustment optical path: not being put into eyeglass to be measured, makes the hot spot of the light in projecting light path and reflected light path respectively can be into
Enter to the first photodetector and the second photodetector, is just produced in this way on the first photodetector and the second photodetector
Corresponding photovoltage has been given birth to, the signal value on the first photodetector and the second photodetector is calculated separately, it is assumed that is incident
The light intensity of light is P, then obtains following result:
Output voltage signal V1 beginning=Rf1 × K1 × T of first photodetector points × P；
Output voltage signal V2 beginning=Rf2 × K2 × R of second photodetector points × P；
T and R is spectroscopical transmissivity and reflectivity respectively, and K1 and K2 are respectively the first photodetector and the second photoelectricity
The photocell light intensity of the detector/photoelectric current linear transformation factor；Rf1 and Rf2 distinguishes the first photodetector and the second photoelectricity
The amplification factor of detector；
2) it will be measured in projecting light path that element under test is placed between spectroscope and the first photodetector, if tested
The anti-rate of crossing of sample is R ', adjusts the position of the first photodetector in projecting light path, makes the photocell of the first photodetector
The reflected light of element under test, then the output voltage signal to the first photodetector and the second photodetector can be received completely
Be acquired, if the fluctuation factor of incident light is α, then when incident light α times when being signal acquisition in step 1) of light intensity value,
Then:
The output voltage signal V1 of first photodetector is anti-=Rf1 × K1 × R ' × T points × source P × α；
The output voltage signal V2 of second photodetector is anti-=Rf2 × K2 × R points × source P × α；
Reflectivity R '=(V1 anti-/V2 anti-)/(V1 beginning/V2 begins).
Namely the reflectivity of element under test can directly be calculated by the voltage value that two steps are read, it is flat to element under test
Face or curved surface have no requirement, and measurement is simple, quick, while can also work in all band.
Claims (9)
1. the detection device of a kind of transmitance and reflectivity, it is characterised in that: including beam shaping lens, spectroscope, the first light
Electric explorer and the second photodetector；Beam shaping lens and spectroscope are set gradually along the incident light direction of light, the first light
Electric explorer is located on spectroscopical projecting light path, and the second photodetector is located on spectroscopical reflected light path.
2. the detection device of transmitance as described in claim 1 and reflectivity, it is characterised in that: spectroscopical mirror surface and light beam
Angle between the central axis of shaping lens is 45 °.
3. the detection device of transmitance as claimed in claim 1 or 2 and reflectivity, it is characterised in that: along the incident direction of light,
Beam shaping lens include the first lens successively to connect, the second lens, the third lens and the 4th lens；First lens and second
The center spacing of lens is zero；The center spacing of second lens and the third lens is 5-6mm；In the third lens and the 4th lens
In the heart away from for 5-6mm.
4. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: along the incident direction of light,
One lens include opposite first surface and the second curved surface, and the radius of curvature of first surface is -28.2 millimeters, the song of the second curved surface
Rate radius is 25.5 millimeters.
5. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: along the incident direction of light,
Two lens include opposite third curved surface and the 4th curved surface, and the radius of curvature of third curved surface is 100.3 millimeters, the song of the 4th curved surface
Rate radius is -12.6 millimeters.
6. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: along the incident direction of light,
Three lens include opposite the 5th curved surface and the 6th curved surface, and the radius of curvature of the 5th curved surface is -35.6 millimeters, the song of the 6th curved surface
Rate radius is -150.73 millimeters.
7. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: along the incident direction of light,
Four lens include opposite the 7th curved surface and the 8th curved surface, and the radius of curvature of the 7th curved surface is 80.04 millimeters, the song of the 8th curved surface
Rate radius is -30.6 millimeters.
8. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: the center thickness of the first lens
It is 4.5 millimeters, the center thickness of the second lens is 5 millimeters.
9. the detection device of transmitance as claimed in claim 3 and reflectivity, it is characterised in that: the center thickness of the third lens
It is 2 millimeters, the center thickness of the 4th lens is 4 millimeters.
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| CN201821344784.XU CN208751830U (en) | 2018-08-21 | 2018-08-21 | A kind of detection device of transmitance and reflectivity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443703A (en) * | 2018-08-21 | 2019-03-08 | 南京波长光电科技股份有限公司 | A kind of detection device and detection method of transmitance and reflectivity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443703A (en) * | 2018-08-21 | 2019-03-08 | 南京波长光电科技股份有限公司 | A kind of detection device and detection method of transmitance and reflectivity |
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