Some standard content:
National Metrology Verification Regulation of the People's Republic of China JJG311—1996
Focometer
1996-04—10 Issued
1996-1001 Sold and implemented
State Bureau of Technical Supervision Issued
JIG311
Verification Regulation
of Focomctcr
JJG 311—1996
This verification procedure was approved by the State Technical Supervision Bureau in April 1996 and implemented on October 1, 1996
Responsible unit: Asian Institute of Science
China Institute of Verification Science
Drafting unit:
Beijing Yaogong University
The drafting unit is responsible for the technical provisions of this regulation. The main drafters of this regulation:
Ma Sheye
Wang Liru
Participating drafter!
Zhao Liping
.: 311-1996
(China Institute of Metrology)
(China Institute of Metrology)
(Beijing Institute of Technology)
Technical requirements
3. Qualification requirements and acceptance conditions
4. Inspection
Inspection is a must for card closing. Inspection cycle
J.JG+ 3H-
199 yuan
JJG311—199h
focal length meter calibration procedure
This is a new standard to make the calibration of common and dangerous points. Overview
The black instrument is a single optical transmission light or a three-dimensional focal length meter. The instrument can measure the distance between the instrument and the microscope (with a microscope, ... The measurement method used is the wavelength method, as shown in Figure 1 - 222
+Element
Medical 1 The original picture of the stealing cabinet is limited to the original picture
Production management points, in the image formed by
1 is parallel to the center of the image:
3 is the center of the image, and a good certificate is given: a
parallel light transmission II1: with a certain spacing of Y between the engravings (also known as the Polo plate), the image is formed on the surface of the drum, the engraving In order to determine the distance between the image and the focal length of the lens, the following formula is used to generate the distance between the objective lens and the focal length of the lens: Y
, parallel light, objective lens focal length, mm:
Y--a pair of lines on a grating plate, mIr: the distance between the image intercepted by the pair of lines on the grating plate at the focal length of the lens being measured, mm--this is called the distance between the image and the focal length of the lens being measured, and the result is measured by the display device: The final formula for the focal length of the lens being measured is obtained. ：f
Click: Detailed information of measuring microscope objective lens: ()
Length mode measures the number of times you make money, m
H-measures the image of the slope of the plate on the micrometer eyepiece, and reads the number of circles made by the micrometer wheel
1 Appearance
JI:311-1996
2 Technical requirements
1,1 must be strictly marked with the manufacturer's name, product model and product number, the surface should be smooth and even; no peeling, scratches, rust, etc., all engraved lines and engravings should be complete and without defects such as new lines and discoloration. 1.2 The fittings of the moving parts of the telemeter should be properly tight: the locking hand teeth should be effective; the rotation of the micrometer handwheel should be smooth and even; the engraved lines on the scale plate should be clear, without lag, jump and fluctuation during movement; 1.3 When measuring the focal length, the image should be clear and the brightness should be uniform. There should be no noticeable oil, water marks and dots; the engravings on the scale plates should be complete and uniform. 2. Test the collimator objective: the single point image should be complete, without cracks, spots, distortion, flatness and other phenomena; 3. The actual resolution α of the collimator objective should be better than the value calculated by the following formula: 141\21
In the formula:
The effective aperture of the collimator lens is: For the commonly used focalometer, D-50rm;-2.8\.
The current difference of the collimator is measured by the autocollimation method. Through the observation, the images of the four scales reflected by the horizontal lines should be clearly seen at the same time, and the relative distance between the two scale lines should not exceed 1% of the scale line width. The tolerance of the distance between the scale lines shall comply with the provisions of Table 1. 5
The relative error of the focal length of the collimator objective lens is allowed to be +0.1%. The relative error of the vertical magnification of the measuring microscope objective lens is allowed to be ±1.1%. 1
The verticality tolerance of the parallel light axis of the central inspection surface is 1
The parallelism tolerance of the semi-linear light axis is allowed to be 1010. The basic range of the distance measurement of the instrument is -10.--1200, and the relative error is -0.3%: 2
31I—1996
Verification items and verification conditions
Verification items of distance meter and their corresponding verification conditions Table 2 Table 2
Antelope items E
Parallel light tube objective lens age
Parallel light difference
Parallel light difference
Parallel light tube focal energy
Microscope objective tube position
Support positioning face parallel
Verticality of light tube axis||tt ||Guide axis parallelism
Optical axis parallelism diagram
Military comprehensive misalignment
Main fixing tools
Optical weapon
Optical fixture
Orbital mirror and plane area shooting structure
Laser center
Length instrument and combat effectiveness comparison teaching instrument
Longitude and latitude
Xiaoman number ruler
European light
Excitation service
Encircling lens
Special "below\and point out that this item should be calibrated;||tt ||12 Calibration environment
After the calibration is not carried out according to the control category
, the calibration room environment temperature (2 ± 3) should be cut off, the calibration room temperature of the calibration instrument should not be less than 4, and the relative humidity in the room should not be greater than 85%. 1. Technical requirements for the main inspection equipment
13.1 The horizontal disc of the instrument should measure the color difference of 213.? The optical position: The distance between the optical tube and the objective lens should be 2 of the distance between the parallel light of the instrument and the objective lens. -5 times, flat rain reflection: the above is the light turning N5, local light network AN.113,33
laser sand comparator and line pattern comparator
micro light is related to the comparator (or photoelectric comparator) the combined limit error does not exceed + (.2+0.131.) m, where is the measured length, the unit is 1:
effective comparator display error does not exceed 1m (corrected for the instrument scale) is the measured base length. Unit, mmbzxz.net
13.5 glass line pattern
.IG 311—1996
The second-class standard Liao line ruler comprehensive limit error is not more than 2 (0.21".51.1n: its towel [is the measured length, the single mode is m,
13.6 laser
laser wavelength is 632.km, single mode, laser power is 0.8m, 13.7? The required distance is standard lens
standard lens, the uncertainty of its focal value ( ★一2.5）小工0.1%，防喷镜标准適合镜类如丧3。
Select lens type
14 Appearance
Flat convex (called) transparent environment
Four verification methods
Nong Wanhe transparent sales
Self-focus evaluation of the teacher's case, the actual work of each three-wheel activity is divided into three parts, and the field of view is observed through the measurement microscope diagram of the focal length meter. The implementation meets the requirements of Article 1 of this regulation. 15 Quantity inspection of the optical tube mirror
Use the optical seat to pass the test. Place the star point pole on the focal plane of the optical base, and place the collimator objective lens to be measured on the optical base holder: observe through the microscope, the image should be found without any difference, which meets the requirements of Article 2 of this regulation: measure the distribution force of the objective lens at a half-hour
by
on the optical base, select the A-type distribution plate of the marking plate and place it on the focal plane of the optical base, and place the collimator objective lens to be measured on the holder of the optical base, and place the distribution plate on the center of the objective lens field of view with appropriate light pressure, write down the unit number of the distribution plate that can be marked in four directions, and take the plate number and unit number of the A-type distribution plate as the center of the measuring line, and calculate the distribution force of the object to be measured: (Calculate the following:
#—25 x26 265/
Ratio: f. Focal length of a parallel ray: mm half of the line center distance. mm.
The value must comply with the provisions of Article 3 of this Regulation,
17 Parallax of a half-line optical tube
JJ:311-996
Use the self-collimation H system and adjust the flat front speed to measure: You have this line of light dividing plate behind the Shenzhen two H calibrated city 7 mirror, constitute the white to go straight telescope, and any object lock price forget the adjustable flat mountain total shooting said, through the user specification: mirror inspection, the policy obstacle when reaching the dividing line and the position of the head request of the public planning image, the Sichuan Mei head three-point line question does not stagger with the inorganic lithium article 4 anti-fix,
1S wave must explode the scale line question milk!
Micro light length (digital photoelectric comparison instrument): 4m of the scale we measure: use the load policy ratio to the six 4 can scale line question accurate record will Chu Fei according to the following discussion instrument, take the measurement of the slope board these series of continuous examples, also continuous years, all are pretty, the loss of each pair of distance measurement: its and Wei Liu scale use! The difference of the resistance should be calculated by adding the group 5 in Table 1 [9 parallel light tube balance love black depth
with the instrument measurement single, in this according to the flat micro-light tube object sales, the customer comprehensive instrument single near the objective lens check this coaxial, the old level Wei father points to the flat light tube focal plane 1 share of love to the scale line, the mountain machine into the degree of beauty, continuous observation to times, take the average situation, to calculate the focal sinus measurement with the formula: Yo
f2tanu
Wu Zhong: - focal length instrument parallel light tube objective focus actual measurement signal; (5)
Y measured by the effective distance Bo Luo rescue 1 a pair of scale line spacing measured value (take Y,> a few): the above pair of scale lines for half the line light calculation half of the objective lens angle: the error is
8, - fe - e
In this article: The focal length of this instrument is the value given by the manufacturer. The value shall comply with the provisions of Article 6 of this Regulation: Micro-environment
Satellite speed level meter is used for information measurement. Place a glass ruler at a distance from the objective lens used by the micrometer, and start focusing the display until it passes the end of the micrometer without parallax error. Use the micrometer to measure the slope. After measuring the slope for several times, find the average value and calculate the actual measurement rate:
formula: A - the length of the glass ruler, m; (7)
The number of rotations of the micrometer wheel during the time when the length of the slope passes the image on the micrometer scale is read:
mm -
The error is
JJG3111996
, - PP %
In the formula: \The relative error of the measured microscope multiplied by the axis magnification mountain value fixed value focal length of the microscope objective lens should comply with the regulations of Article 7. The straightness of the optical tube is not measured by the photosensitive interference method. The adjustment settings are shown in Figure 2:
Figure 2 The device is positioned and the optical tube is adjusted to the six-element white hope format of the hundred figure 1 or laser station:: The current opening:! : 4. Light extinguisher ()
Place the tunneling laser and the observation lens at a distance of 1 meter from the parallel light object: first adjust the vertical and horizontal positions of the laser support platform to make the focal length of the parallel light tube objective lens and the vertices of the spherical surface and the center of the special light field coincide with each other, and on the observation screen (the center of the upper diameter is not more than 2 meters), continue to adjust the center of the laser fast 1 sight ring to coincide with the laser light emitted from the center of the observation screen. At this time, the laser beam mouth is consistent with the parallel light axis, move the flame holder half a meter in front of the light tube object, flame holder 1: parallel ring glass (optical figure is less than 5, local aperture is less than (1), the light reflected back from the polar ring 1 meter should be consistent with the observation Observe the overlap of the micro-light holes in the center of the screen, and the overlap should not exceed 5.8mm
22. The misalignment of the guide rail to the optical axis of the parallel light tube is 2. After the first inspection step is completed, remove the inspection and parallel light sections, and then change the light beam element and the parallel light tube light extraction. Remove the flat glass on the tip holder, observe the urine, move the holder back and forth: at a distance of 11T, the multi-motion of the laser light entering the center position on the observation screen should not exceed mT:123. Consider the comprehensive plan
Install the focal length standard lens on the focal length lens! , the direction of the number marked on the standard lens is the same as the parallel light basket, select a microscope with a suitable magnification, and the axial multi-motion lens This projector enables the microscope to see the image of the plate without parallax: use the micrometer to set the image spacing between the scale lines on the microscope scale, read it 5 times in a row, and take the average value, which is the measured number of circles read on the scale of the glass scale on the micrometer eyepiece. The formula for calculating the actual value of the focal length of the measured lens is: J=KYoP
——The measured value of the focal length of the measured standard lens. I(9)
JJG3111996
The measured value of the focal length of the collimator objective, mm.; Y,.-The measured value of the scale line on the plate, tm is measured to the vertical axis magnification of the microscope objective. The measured value K is the reciprocal of the pitch of the worm-type micrometer eyepiece. Generally, the distance between the image of the scale line on the micrometer eyepiece scale plate is the number of revolutions of the micrometer wheel.
Only the comprehensive relative error of the instrument:
in the focus:
the focus should be given by the focus of the standard lens.
The comprehensive relative error of the instrument should comply with the provisions of Article 10 of this regulation. The processing of the calibration results and the calibration cycle
24 After calibration, the calibration product card will be issued if it meets the requirements of this regulation. The calibration results of the focus instrument that does not meet the requirements of this regulation will be issued. The calibration cycle of the focus instrument is 3 years.After the first inspection step is completed, remove the observation lens and the parallel light section, change the light beam element and the parallel light tube, remove the flat glass on the tip holder, observe the urine, move the holder back and forth: at a distance of 11T, the movement of the laser light into the center position on the observation screen should not exceed mT:123. Consider the comprehensive plan
Install the focal length standard lens on the focal length lens! , the direction of the numbers marked on the standard transmission glass is parallel to the object, choose a microscope of appropriate magnification, and use an axially movable projector so that the image on the plate without parallax can be seen through the microscope: use a micrometer to calculate the number of circles H between the images formed by the scale lines on the glass, read it 5 times in a row, and take the average number of circles H, which is the measured number of circles read on the scale lines on the micrometer eyepiece. This is the calculation formula for the actual value of the focal length of the measured standard lens: J=KYoP
--The measured value of the focal length of the standard lens being measured. I(9)
JJG3111996
The focal length of the collimator objective is measured, mm.; Y,.-The measured value of the plate is measured to the vertical axis magnification of the microscope objective. The measured value of the screw pitch of the worm-type micrometer eyepiece is measured, mn
Generally, the distance between the image of the engraved line on the micrometer eyepiece scale plate is the number of revolutions of the micrometer wheel.
Only the comprehensive relative error of the instrument:
Wu Zhong:
The focal length of the standard lens is given by the industry.
The comprehensive relative error of the instrument shall comply with the provisions of Article 10 of this regulation.
Handling of calibration results and calibration cycle
24After calibration, if it meets the requirements of this regulation, a calibration product card will be issued. If it does not meet the requirements of this regulation, a calibration result renewal plan will be issued.
25The calibration cycle of the focal instrument is 3 years.After the first inspection step is completed, remove the observation lens and the parallel light section, change the light beam element and the parallel light tube, remove the flat glass on the tip holder, observe the urine, move the holder back and forth: at a distance of 11T, the movement of the laser light into the center position on the observation screen should not exceed mT:123. Consider the comprehensive plan
Install the focal length standard lens on the focal length lens! , the direction of the numbers marked on the standard transmission glass is parallel to the object, choose a microscope of appropriate magnification, and use an axially movable projector so that the image on the plate without parallax can be seen through the microscope: use a micrometer to calculate the number of circles H between the images formed by the scale lines on the glass, read it 5 times in a row, and take the average number of circles H, which is the measured number of circles read on the scale lines on the micrometer eyepiece. This is the calculation formula for the actual value of the focal length of the measured standard lens: J=KYoP
--The measured value of the focal length of the standard lens being measured. I(9)
JJG3111996
The focal length of the collimator objective is measured, mm.; Y,.-The measured value of the plate is measured to the vertical axis magnification of the microscope objective. The measured value of the screw pitch of the worm-type micrometer eyepiece is measured, mn
Generally, the distance between the image of the engraved line on the micrometer eyepiece scale plate is the number of revolutions of the micrometer wheel.
Only the comprehensive relative error of the instrument:
Wu Zhong:
The focal length of the standard lens is given by the industry.
The comprehensive relative error of the instrument shall comply with the provisions of Article 10 of this regulation.
Handling of calibration results and calibration cycle
24After calibration, if it meets the requirements of this regulation, a calibration product card will be issued. If it does not meet the requirements of this regulation, a calibration result renewal plan will be issued.
25The calibration cycle of the focal instrument is 3 years.
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