CN110274753A - A kind of lossless detection method of optical mirror slip refractive index - Google Patents
A kind of lossless detection method of optical mirror slip refractive index Download PDFInfo
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- CN110274753A CN110274753A CN201910668477.XA CN201910668477A CN110274753A CN 110274753 A CN110274753 A CN 110274753A CN 201910668477 A CN201910668477 A CN 201910668477A CN 110274753 A CN110274753 A CN 110274753A
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- eyeglass
- light
- refractive index
- mirror slip
- radiation source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0228—Testing optical properties by measuring refractive power
Abstract
The invention discloses a kind of lossless detection methods of optical mirror slip refractive index, include the following steps: mounting and fixing support, optical mirror slip is horizontally fixed on fixed frame, radiation source is fixedly mounted by adjusting bracket on fixed frame, adjusting bracket makes radiation source horizontal by certain angle, open radiation source switch, light is with a certain tilt angle directive eyeglass, pass through measuring instrument, measure the incident angle of light, the refraction angle of light, lens substrate thickness, the refractive index of air refraction and lens substrate, according to the function parameter of measurement, pass through optical computing formula, obtain the functional relation of refractive index and reflectivity, it establishes Cauchy light and dissipates model, lens index dispersion is measured, it is measured using reflectivity of the optical gauge to eyeglass, every the one group of spectral reflectance of measurement in 5 minutes, 20-30 group data are measured, according to the data of measurement, by determining the refractive index of optical mirror slip to data processing.
Description
Technical field
The present invention relates to optical mirror slip measurement field more particularly to a kind of lossless detection methods of optical mirror slip refractive index.
Background technique
Measurement lens index mainly uses minimum deviation footwork, A Er refractor critical angle method and V-arrangement rib at present
The methods of mirror method.More demanding prism is made in sample by minimum deviation method, and then light is reflected by prism,
Find incident light and refracted light angle minimum value, progress refractive index calculating, can be used precision goniometer and spectrometer into
The measurement of row minimum deviation；Abbe refractometer critical angle method needs eyeglass being made into sample, will be known to tested sample and one
The refracting prisms of refractive index stick together, and the refractive index at sample bottom is acquired according to the cirtical angle of total reflection；V-arrangement prism method needs will be by
The plane that lens sample grinds two 90 degree is surveyed, is put into the V-notch of V prism, is measured by measurement light deviation angle
The refractive index of eyeglass.For the eyeglass of plated film, require to take off on the eyeglass of plated film using these methods
Mould processing, is then prepared into sample block for eyeglass, equal to parameters such as the thickness of sample block, angle, flatness and finish in the preparation
There is certain requirement, using above-mentioned various methods after detection, eyeglass film layer is destroyed, and eyeglass can not use.
Summary of the invention
The invention proposes a kind of lossless detection methods of optical mirror slip refractive index, to solve to propose in above-mentioned background technique
The problem of.
The invention proposes a kind of lossless detection methods of optical mirror slip refractive index, include the following steps:
S1: optical mirror slip is horizontally fixed on fixed frame by mounting and fixing support, is fixedly mounted on fixed frame by adjusting bracket
Radiation source；
S2: after instrument installation is fixed, adjusting bracket, so that radiation source opens radiation source horizontal by certain angle
Switch, light form incidence angle with a certain tilt angle directive eyeglass, and light reflects on eyeglass, and refracted light passes through
Refraction angle is formed between eyeglass, with eyeglass, by measuring instrument, measures the incident angle of light, the refraction angle of light, eyeglass
The refractive index of substrate thickness, air refraction and lens substrate；
S3: the functional relation of refractive index and reflectivity is obtained by optical computing formula according to the function parameter measured in S2；
S4: it establishes Cauchy light and dissipates model, lens index dispersion is measured, analyze the rule of eyeglass dispersion of refractive index；
S5: being measured using reflectivity of the optical gauge to eyeglass, every the one group of spectral reflectance of measurement in 5 minutes, is surveyed
Measure 20-30 group data；
S6: according to the data of measurement, by determining the refractive index of optical mirror slip to data processing.
Preferably, in the S1, the top of adjusting bracket is rotatably connected to barn door, and the other side of barn door is overlapped on solid
To determine on frame, the area of barn door is greater than fixed frame, during detection, rotates barn door, and shutter covers radiation source,
At this point, external light source can not be irradiated on eyeglass, the incident light on eyeglass is provided by radiation source, avoids outside to the greatest extent
Light influences the radiation response of radiation source, reduces measurement error, keeps the refractometry of eyeglass more accurate.
Preferably, in the S1, radiation source is white light source, and radiation source is filled equipped with irradiation light intensity adjustment
It sets, by device for regulating rotary, changes the intensity of illumination of radiation source, so that the incident bright position of irradiation light, is passing through eyeglass
After refraction, refracted light is brighter, convenient for the measurement of incidence angle and refraction angle angle, reduces measurement error, improves measurement accuracy.
Preferably, in the S3, the functional relation of refractive index and reflectivity is by reflectivity calculation formula and Fresnel
Principle is obtained, is the reflectivity of substrate and the function of refractive index, incidence angle and extinction coefficient.
Preferably, in the S4, it is eyeglass folding rate and extinction coefficient functional relation that Cauchy light, which dissipates model, according to eyeglass
Material type, it can be deduced that the ranges of indices of refraction value of eyeglass and the value range of extinction coefficient draw the song of lens index dispersion
Line chart, it is convenient that data are analyzed.
Preferably, in the S5, optical gauge is advanced thin films thickness gauge nkd-8000, is to open in measurement process
Film thickness instrument nkd-8000 thickness measuring system power supply, light source preheat 30 minutes, make to be emitted stabilized intensity；By adjusting collimation rotation
Button, making probe outgoing is less parallel light, that is, the light being emitted is constant in a certain range size in axial spot diameter；Adjust diaphragm
Size, to obtain outgoing beam diameter appropriate；Reflecting plate is put on test desk, software is opened and is run, by adjusting water
Flat knob and horizontal knob keep reflection plate surface vertical with incident beam, even if the reflective light intensity into fibre-optical probe is maximum, note
Record measured value at this time, fine tuning collimates knob, then adjusts horizontal knob, obtains new measured value, by the measured value newly obtained with
The measured value of measurement compares for the first time；This operation is repeated, to obtain maximum measured value, is focused at this time best, outgoing beam is flat
Row degree is best；Reflecting plate is removed, lens sample is installed, the reflectivity of eyeglass can be accurately measured.
Preferably, in the S6, data are arranged first in data handling procedure, the reflectivity for drawing measurement is bent
Line chart is fitted to obtain eyeglass finally by Newton iteration method further according to lens index dispersion curve and reflectance graph
Refractive index.
A kind of lossless detection method of optical mirror slip refractive index proposed by the present invention, beneficial effect are: the present invention passes through
Optical instrument measures the reflectivity of eyeglass, establishes light and dissipates model, reduces the influence that eyeglass light dissipates refractive index, by establishing function
Relational expression obtains multi-group data value, by the fitting to data, obtains the refractive index of eyeglass, method is simple, and this method is to eyeglass
Detection lens surface film layer will not be damaged, also, the accuracy of detection method detection is high.
Specific embodiment
It is next combined with specific embodiments below that the present invention will be further described.
The invention proposes a kind of lossless detection methods of optical mirror slip refractive index, include the following steps:
S1: optical mirror slip is horizontally fixed on fixed frame by mounting and fixing support, is fixedly mounted on fixed frame by adjusting bracket
Radiation source, the top of adjusting bracket are rotatably connected to barn door, and the other side of barn door is overlapped on fixed frame, barn door
Area is greater than fixed frame, during detection, rotates barn door, and shutter covers radiation source, at this point, external light source without
Method is irradiated on eyeglass, and the incident light on eyeglass is provided by radiation source, and extraneous light is avoided to influence irradiation light to the greatest extent
The radiation response in source reduces measurement error, keeps the refractometry of eyeglass more accurate, and radiation source is white light source, and shines
It penetrates light source and the intensity of illumination of radiation source is changed by device for regulating rotary equipped with irradiation light intensity adjustment device, so that according to
The incident bright position of light is penetrated, after eyeglass reflects, refracted light is brighter, convenient for the measurement of incidence angle and refraction angle angle,
Reduce measurement error, improves measurement accuracy；
S2: after instrument installation is fixed, adjusting bracket, so that radiation source opens radiation source horizontal by certain angle
Switch, light form incidence angle with a certain tilt angle directive eyeglass, and light reflects on eyeglass, and refracted light passes through
Refraction angle is formed between eyeglass, with eyeglass, by measuring instrument, measures the incident angle of light, the refraction angle of light, eyeglass
The refractive index of substrate thickness, air refraction and lens substrate；
S3: obtaining the functional relation of refractive index and reflectivity by optical computing formula according to the function parameter measured in S2,
The functional relation of refractive index and reflectivity is obtained by reflectivity calculation formula and Fresnel principle, is the reflectivity of substrate
With the function of refractive index, incidence angle and extinction coefficient；
S4: establishing Cauchy light and dissipate model, measure to lens index dispersion, analyze the rule of eyeglass dispersion of refractive index,
It is eyeglass folding rate and extinction coefficient functional relation that Cauchy light, which dissipates model, according to the material type of eyeglass, it can be deduced that eyeglass
The value range of ranges of indices of refraction value and extinction coefficient draws the curve graph of lens index dispersion, convenient to analyze data；
S5: being measured using reflectivity of the optical gauge to eyeglass, every the one group of spectral reflectance of measurement in 5 minutes, is surveyed
20-30 group data are measured, every group of data are imported in functional expression, obtain multiple groups experiment curv, optical gauge is advanced thin
Film thickness instrument nkd-8000, to open film thickness instrument nkd-8000 thickness measuring system power supply in measurement process, light source preheats 30 points
Clock makes to be emitted stabilized intensity；Knob is collimated by adjusting, making probe outgoing is less parallel light, that is, the light being emitted is in axial light
Spot diameter is constant in a certain range size；Diaphragm size is adjusted, to obtain outgoing beam diameter appropriate；Reflecting plate is put into survey
It measures on platform, open software and runs, by the horizontal knob of adjusting and horizontal knob, keep reflection plate surface vertical with incident beam,
Even if the reflective light intensity into fibre-optical probe is maximum, measured value at this time is recorded, fine tuning collimates knob, then adjusts horizontal knob,
New measured value is obtained, by the measured value newly obtained compared with the measured value of first time measurement；This operation is repeated, to obtain maximum
Measured value, focus at this time best, the outgoing beam depth of parallelism is best；Reflecting plate is removed, lens sample is installed, it can be accurate
Measure the reflectivity of eyeglass；
S6: according to the data of measurement, by that be arranged first to data in data handling procedure, will count to data processing
According to importing in functional expression, the reflectance graph of measurement is drawn, further according to lens index dispersion curve and reflectance graph,
It is fitted to obtain the refractive index of eyeglass finally by Newton iteration method, determines the refractive index of optical mirror slip.
The present invention measures the reflectivity of eyeglass by optical instrument, establishes light and dissipates model, reduces eyeglass light and dissipates refractive index
Influence obtain multi-group data value, by the fitting to data, obtain the refractive index of eyeglass by establishing functional relation, side
Method is simple, and this method will not damage the detection of eyeglass to lens surface film layer, also, the accuracy of detection method detection
It is high.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of lossless detection method of optical mirror slip refractive index, which comprises the following steps:
S1: optical mirror slip is horizontally fixed on fixed frame by mounting and fixing support, is fixedly mounted on fixed frame by adjusting bracket
Radiation source；
S2: after instrument installation is fixed, adjusting bracket, so that radiation source opens radiation source horizontal by certain angle
Switch, light form incidence angle with a certain tilt angle directive eyeglass, and light reflects on eyeglass, and refracted light passes through
Refraction angle is formed between eyeglass, with eyeglass, by measuring instrument, measures the incident angle of light, the refraction angle of light, eyeglass
The refractive index of substrate thickness, air refraction and lens substrate；
S3: the functional relation of refractive index and reflectivity is obtained by optical computing formula according to the function parameter measured in S2；
S4: it establishes Cauchy light and dissipates model, lens index dispersion is measured, analyze the rule of eyeglass dispersion of refractive index；
S5: being measured using reflectivity of the optical gauge to eyeglass, every the one group of spectral reflectance of measurement in 5 minutes, is surveyed
Measure 20-30 group data；
S6: according to the data of measurement, by determining the refractive index of optical mirror slip to data processing.
2. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S1
In, the top of adjusting bracket is rotatably connected to barn door, and the other side of barn door is overlapped on fixed frame, and the area of barn door is big
In fixed frame, during detection, barn door is rotated, shutter covers radiation source, at this point, external light source can not irradiate
Onto eyeglass, the incident light on eyeglass is provided by radiation source, and extraneous light is avoided to influence the photograph of radiation source to the greatest extent
Effect is penetrated, reduces measurement error, keeps the refractometry of eyeglass more accurate.
3. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S1
In, radiation source is white light source, and radiation source is equipped with irradiation light intensity adjustment device and is changed by device for regulating rotary
Become the intensity of illumination of radiation source, so that the incident bright position of irradiation light, after eyeglass reflects, refracted light is brighter, just
In the measurement of incidence angle and refraction angle angle, reduce measurement error, improves measurement accuracy.
4. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S3
In, the functional relation of refractive index and reflectivity is obtained by reflectivity calculation formula and Fresnel principle, is the anti-of substrate
It penetrates than the function with refractive index, incidence angle and extinction coefficient.
5. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S4
In, it is eyeglass folding rate and extinction coefficient functional relation that Cauchy light, which dissipates model, according to the material type of eyeglass, it can be deduced that eyeglass
Ranges of indices of refraction value and extinction coefficient value range, draw the curve graph of lens index dispersion, it is convenient that data are divided
Analysis.
6. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S5
In, optical gauge is advanced thin films thickness gauge nkd-8000, is surveyed in measurement process to open film thickness instrument nkd-8000
Thick system power supply, light source preheat 30 minutes, make to be emitted stabilized intensity；Knob is collimated by adjusting, it is approximate flat for making probe outgoing
Row light, that is, the light being emitted are constant in a certain range size in axial spot diameter；Diaphragm size is adjusted, to obtain outgoing appropriate
Beam diameter；Reflecting plate is put on test desk, software is opened and is run, by adjusting horizontal knob and horizontal knob, is made anti-
It penetrates that plate surface is vertical with incident beam, even if the reflective light intensity into fibre-optical probe is maximum, records measured value at this time, fine tuning is quasi-
Direct rotary button, then horizontal knob is adjusted, new measured value is obtained, by the measured value ratio of the measured value newly obtained and first time measurement
Compared with；This operation is repeated, to obtain maximum measured value, is focused at this time best, the outgoing beam depth of parallelism is best；Reflecting plate is taken
Under, lens sample is installed, the reflectivity of eyeglass can be accurately measured.
7. a kind of lossless detection method of optical mirror slip refractive index according to claim 1, it is characterised in that: the S6
In, data are arranged first in data handling procedure, the reflectance graph of measurement are drawn, further according to lens index
Dispersion curve and reflectance graph are fitted to obtain the refractive index of eyeglass finally by Newton iteration method.
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Cited By (4)
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| CN110927105A (en) * | 2019-12-02 | 2020-03-27 | 四川大学 | Method for measuring refractive index of double-prism material |
| CN110927107A (en) * | 2019-12-02 | 2020-03-27 | 四川大学 | Method for realizing measurement of material refractive index by irradiating single-side edge surface of double prism |
| CN111175251A (en) * | 2020-01-15 | 2020-05-19 | 四川大学 | Method for measuring refractive index of material by irradiating edge surface and bottom surface of double prism |
| CN115096849A (en) * | 2022-08-24 | 2022-09-23 | 江苏浩纳光电股份有限公司 | Nondestructive testing device for refractive index of optical lens |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927105A (en) * | 2019-12-02 | 2020-03-27 | 四川大学 | Method for measuring refractive index of double-prism material |
| CN110927107A (en) * | 2019-12-02 | 2020-03-27 | 四川大学 | Method for realizing measurement of material refractive index by irradiating single-side edge surface of double prism |
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| CN110927107B (en) * | 2019-12-02 | 2021-07-23 | 四川大学 | Method for realizing measurement of material refractive index by irradiating single-side edge surface of double prism |
| CN111175251A (en) * | 2020-01-15 | 2020-05-19 | 四川大学 | Method for measuring refractive index of material by irradiating edge surface and bottom surface of double prism |
| CN115096849A (en) * | 2022-08-24 | 2022-09-23 | 江苏浩纳光电股份有限公司 | Nondestructive testing device for refractive index of optical lens |
| CN115096849B (en) * | 2022-08-24 | 2023-01-06 | 江苏浩纳光电股份有限公司 | Nondestructive testing device for refractive index of optical lens |
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