Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG981--2003
Standard Blocks for Abbe Refractometers
Standard Blocks for Abbe Refractometers2003-09-23 Issued
Implementation on 2003-12-23
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JJG9R1—2003
Verification Regulations for Standard Blocks for Abbe Refractometers
JJG1—2003
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 23, 2003, and came into effect on December 23, 2003.
Responsible unit:
Main drafting unit:
National Technical Committee for Optical Metrology
China Academy of Planning and Engineering
This regulation entrusts the National Technical Committee for Optical Metrology to be responsible for interpreting the main drafters of this regulation;
Liu Wence
Ma Chaya
Jiang Shifeng
JJ981—2003
【China Academy of Planning and Engineering】
(China Institute of Metrology 3.3 Design and performance requirements 4.4 General technical requirements 4.1 Appearance 4.2 Maintenance 4.3 Geometric parameters 5.5 Equipment manufacturing 5.1 Qualification conditions 5.2 Verification items 5.3 Verification methods 5.4 Treatment of verification knots |tt||5.5 Calibration period
JJG981—2003
Appendix A Refractive index and formulation method of refracting liquid Appendix B Uncertainty evaluation method for measuring refractive index () value Appendix C
Method for evaluating the uncertainty of measurement of average dispersion (: ) value Appendix
Verification record of standard block of refractometer
Appendix E Format of certificate and verification result notice (content) of standard block of refractometer 1
1 Scope| |tt||JJG98120-03
Verification Procedure for Abbe Refraction Standard Block
This procedure is applicable to the initial verification of Abbe refractometer standard blocks, subsequent verification and in-use inspection: The refractive index inspection of the working sample block equipped with the Abbe refractometer shall be carried out in accordance with this procedure: 2 Overview
The Abbe refractometer standard block (hereinafter referred to as the standard block) is used to calibrate the Abbe refractometer and other standard measuring instruments (standard) using the Abbe refraction principle. The working sample block (hereinafter referred to as the working sample block) is equipped with the Abbe refractometer and is used to adjust and inspect the Abbe refractometer: The standard block is a rectangular block made of four high-quality optical glass materials: light glass K1, contact glass K, fire glass 12, and heavy fire convex glass 2. The main methods for measuring the reflectivity of optical materials include precision angle measurement method, mirror refraction method, and liquid refraction method. This procedure uses the calibration refraction method: using a mirror refractometer and the comparison measurement method, select the refractive index of each line of the standard basis, use the satellite spectrum line to measure the refractive index value, use the F spectrum line and the spectrum line to measure the difference, which is the uniform dispersion value. If the refractive index of other spectra (such as coma), the corresponding spectral line (such as the e line in the mercury lamp) should be used. The principle of the V-prism refraction method is as follows: As shown in Figure 1, when a monochromatic parallel light beam is incident vertically on a V-prism, it is refracted multiple times by the V-prism and the sample: the outgoing light is deflected: According to the law of refraction, the refractive index of the sample is calculated using formula (1) n = (n + sin n + sin)u
, where: the refractive index of the sample is obtained by the optical microscope; the refractive index of the sample is obtained by the deflection of the light emitted from the last side of the V-prism. When n=. When n=0:
When n is less than 0, it is positive:
When n is less than 0, it is negative
3 Metrological performance requirements
3.1 The measurement uncertainty of the refractive index (n) value of the standard block should not exceed 5×10-3 (n=3) 3.2 The measurement uncertainty of the average dispersion (n) value of the standard block should not exceed 7×10-3 (n=3). 3.3 The measurement uncertainty of the refractive index () value of the working sample block should be within the requirement of 1×10-(-3): 4 General technical requirements
[3G981—2003
Figure 1 The material grades of the original measurement materials are 0K1, K4, and 2, respectively. The block is marked with numbers, and there are no visible defects such as streaks, spots, bubbles, magnetic spots, broken edges, mildew spots, and scratches that obviously affect the measurement accuracy. 4.2 Maintenance
After polishing the surface of the standard block, wipe it with absorbent cotton or a cloth with a little anhydrous alcohol and store it in a dry place. 43 The shape of the block is shown in Figure 2. The point length should not be less than 1mm and the reverse length should not be less than 15m. The standard block should be polished (at least one polished surface): the angle between the two polished surfaces should be right angles, and the error should be less than ten. 11
Figure 2 Refraction standard
5 Instrument control
Instrument control package: initial calibration, subsequent calibration and in-use inspection 51 Concrete confirmation
5.1.1 Calibration equipment
5..1.1 The minimum resolution of the near reflection rate value is 1×5.1. 1.2 Light source
Najiang: lamp light source, 6 ordinary incandescent lamp, D line, F line, C line filter 2
5.1.1.3 Refractive fluid
JJG9812003
The difference between the refractive index of various refractive fluids and the refractive index of various optical slopes is not less than +.6, and the difference between the diffusion and the sum of each target block is not more than +.015. The refraction and matching methods of commonly used refracted waves are as follows 15.1.1.4 Distilled water
5.1.2 Supporting equipment
5.1.2.1 Magnifying glass not less than 4 times,
5.1.2.2 Comparison goniometer, the minimum scale value shall not be greater than [\, the indication error of the instrument shall not exceed ±6\5.1.2.3 mm scale ruler.
5.1.3 Environmental conditions
5,13.1 Temperature: 29±19
The calibration equipment and the standard to be tested shall be placed in a climate chamber for 4h before calibration: 5.1.3.2 Relative humidity: ≤85%RI
5.2 Calibration items
The calibration items are shown in Table 1.
Test items
Geometric parameters
Standard block new reflectivity (,
Standard block semi-average dispersion (-)
Prediction of block refractive index () value
Current calibration method: All the items to be tested are indicated by "+", and the items not to be tested are tested by 3.3 calibration method
5.3.1 External inspection
Subsequent calibration
" table
Method for median calibration
Use black background and 6W ordinary light bulb as light source: Use the effective daily observation case to select blocks and conduct calibration according to the conditions listed in Article 4.1.
5.3.2 Geometric parameter inspection
According to Article 4.3, use the comparison goniometer to measure the straightness error of each standard block, and use the ruler to measure its geometric size. 5.3.3 Measurement of the refractive index (n) value of the standard block Use the V-beam new projector to measure the reflectivity of the abandoned spectrum line of the block, 5.3.3. a) Select a suitable V-shaped mirror and its correction function on the V-shaped mirror refraction block (the suitable prism is the V-shaped mirror optical glass, the refractive index difference with the measured correction index is not greater than 0.2, such as K5V mirror when measuring K1 and K9 blocks, and 2F1V prism when measuring F2 and Z12 blocks), and use absorbent cotton to carry absorbent gauze JJ:9812003
The sound is less than the water on the silicon wafer and the photosensitive surface of the corner block, and a little bit of the refraction liquid is applied to the corner surface. The difference between the refraction liquid and the V nuclear energy product is less than ten +, and the V dial is released. The background is corrected, and the common air range is eliminated:! The light source and the reading system are connected. The light source is selected and the code is determined by the factory minute hand: when the degree of protection is completed, the work begins.
The condenser of the design book is positioned to make the light load evenly distributed to the ground. The measuring instrument is usually used to insert the microscope, and the double-pointed and missing ends of the single concentrated image are in the right field of view: the micrometer can be used to read the single scale line in the whole Jin visual image, and the reading is constant. The negative degree is constant, three times, that is, the three lines: e) nuclear oxygen lamp light source, F, filter, city complex s) d! The steps are as follows: measure three times each, read the juice "elimination line: (each elimination line has a 2mw: %: connect the lower straight block, use the tax fertilizer to confirm the wine can combine the rolling case to fill the first block dynamic structure 5.3.3.2 read 2
when the two standard blocks of light are useful Yue fat Ruiyun finger shadow ocean combination liquid nuclear technology clean, apply ten less refraction liquid (the north refraction wave and the standard heat are more reduced by 5), put it in the slot of the teaching, carefully stick it, non-international gas problem
Three ship light source D method light film original bright, main complex 5.3. got: and) let through, night you, measure some two concentrations, spectrum of the three (:
according to the light source, respectively select F,: to complex 1! and) stop, old measurement of the three holy drinks, read the mountain F cut, C live cut of the three, 5.3.3.3 plan forbidden slightly folded about 9
Valley formula (2) according to the European calculation of the three spectral lines of the service of the product 8= 9,
of which, 9wwW.bzxz.Net
= 61e - d
8,-6h.-fnc
5.3.3.4 Calculate the emissivity of the standard
limit according to the instructions for use of the installation, the corresponding formula is used to calculate the three-dimensional emissivity measurement values of the installation; the night level is still, the card plan: control the instrument and the stop of each mark block at the fixed point of the port line, that is, the actual setting problem (the measurement method is not limited to the evaluation of the film, the bottom meets the requirements of Article 31: 5.3. Calculate the color of the mark block Scattering (r: calculate the difference between the actual value and the actual value, average scatter (average scatter () value of a standard flow decision, see the uncertainty evaluation method of the skin test method G, should comply with the provisions of Article 3.2.
5.3.5T make the sample block emissivity (43 digits will be measured single 4
JJG981203
According to Article 5.3.3, there are steps, the continental quantity is the world heat discount case () of the actual ring value, the three samples of the potential analysis of the cold [4) value of the measurement to the uncertainty of the method to see the rate, 5.4 Handling of the verification list
5.4.1 According to the provisions of 5.2 "verification items", the verification is carried out, and all the data are recorded with reference to the table in Appendix D. If the list meets the requirements of the small regulations, it is judged to be qualified and reported as qualified: a verification certificate (the format of the verification certificate is attached) is issued for qualified standards; a verification result notice is issued for qualified standards, and the qualified status is noted (the format of the verification result notice is in Appendix E5. 4,2 gives the standard! ) The value is not accurate, the order is tight: ) The value flashes to the mother to determine the accuracy:
5.5 The same test
The test cycle is generally not accurate.
Appendix A
JIG981-2803
The refractive index and preparation method of commonly used refractive liquids According to the approximate refractive index of the measured liquid, select two liquids with different refractive indices from the refractive liquids and prepare them using the volume ratio method.
V,=ng- nt
Va n? + V, rei
Wherein: V: refractive index of the prepared liquid: |tt||V,—refractive index of the first substrate;
V,—volume of the first liquid;
V——volume of the first substrate,
(n< na< m2)
On the basis of the volume ratio method, the refractive index of the prepared liquid is determined by Abbe refractometer, and according to the difference, the refractive liquid is further prepared so that the difference between the refractive index of the prepared refractive liquid and the refractive index of the optical end standard block meets the process requirements.
The approximate values of the reflectivity of commonly used refracting fluids are shown in Table 2.
Refractive index
Liquid petroleum ether
Hydroxyisocyanate
R-substituted iodine (C,H,Rr)
Diisocyanate (CIL,I)
SnBr
Note: The 1-substituted iodine has anti-absorbent properties and is used only for the first time. 6
About refractive index (n)
Appendix B
JJG981-2003
Method for evaluating the measurement uncertainty of refractive index (n) value According to the relevant steps specified in this regulation, the actual values of the refractive index (n) of four standard blocks such as K1:9, F2, and 22 are measured by V-shaped refractometer. Generally speaking, the measurement uncertainty of the refractive index (n) value of the ZF2 standard block is the largest. Therefore, the measurement uncertainty of the refractive index (n) value of the standard block can be evaluated by taking the measurement uncertainty of the refractive index (n) value of the ZF2 standard block as a representative. B, 1 Measurement process
According to the relevant steps specified in this regulation, use the prism refractometer to measure the three refractions of the 2 standard blocks (measured to the reference point), take the average as above, and obtain the correction value of the prism refraction at this calibration point to obtain the actual value of the refractive index () of ZF2.
B.2 Mathematical model
Constructed mathematical model:
#-a+d+$
Where:
The actual value of the refractive index of the block:
The actual value of the refractive index of the block:
The measured value of the refractive index of the standard block measured by the prism refractometer;
The correction value of the refractometer;
The change of the refractive index caused by the change of the overflow. =
Sensitivity coefficient:
Component standard uncertainty
m,=u(a)
x, =4(e)
Ba-ad\a-
, d, are independent of each other, then: =（++）
13.3 Component standard uncertainty analysis
R.3.1 Measurement standard uncertainty
B.3.1.1: Measurement uncertainty caused by the measurement characteristics of V prism refractometer (Class A assessment) A set of predetermined standard blocks are selected in advance, and the refractive index () value of ZF2 standard block is measured repeatedly with V prism refractometer according to the method and steps specified in the regulations: For example, the first measured value is: 1.67249 0, 1.672480, 1.672484, 1.672489, 1.672479, 1.672504, 1.672484, [.672489, 1.672503, 1.672486, 1.672491. Use Bessel formula to calculate the single measurement experimental standard deviation of the sample (=11): 7
JJG98—2003
=8.2x10-0
In the standard verification work, each point inspection is required to be twice, and the experimental standard deviation of the average value of the two selections is 33 -4.7 ×15 **
t(α.) -1 7×10-
B.3.1.2 The refraction value of the mountain nuclear mirror is only required for the wind measurement book. It is not certain that the refraction instrument will estimate the range of the refraction reading to be 1×10! The average value of the deviation is -1×, [×-], and the standard uncertainty of the estimated accuracy of the judgment of the time-varying instrument is: 1 × 10- = 5.77 × 10-\, and the standard uncertainty of α is: u(n) = 5.77 × 10
B.3.1.3 Measurement uncertainty of α
n(a) -[u(,)+ - uta;)2*12 -(4.7 × 10 03 -(5.77×10-6)j = 7.5× tt-62i = u(a)=7.5 × (0-3
B.3.2 The measurement standard uncertainty obtained by the correction value of the V-mirror refractometer (B-type assessment) is the measurement uncertainty obtained by using the correction value of the V-mirror refractometer. For example, if the V-mirror near-field instrument is calibrated to give a positive value of the refractive index, its measurement uncertainty is =3×10-50A=31.
Then the measurement standard uncertainty obtained by using the refractive index correction of the V-mirror refractometer is (3×10.33-1.00× 10, just:
u(α)±100 ×10-h
B.3.3 The measurement standard uncertainty is
4g= 2(±)=1.00×10:
The influence of temperature change on the long-term product block: In the four-phase standard, the total temperature and the maximum value of the system are 2, and the value is 61×0-7. The humidity of the calibration environment is controlled to 20 + 1, so the maximum value of the refractive index measurement change caused by temperature change is 61 × 10 ×1 - 6.1 × 10 6. From this, let's divide it into three parts, glue, =, then the uncertainty change caused by temperature change is ±() =6. 1×10-*/6 =2.49 ×10±: = n(5) -2.49 × 10 6
B,4 refractive index (,) synthetic standard uncertainty is independent of each other, so the individual standard uncertainty is u. -
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