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Verification Regulation of Focimeters JJG580—1996
Focimeter
Issued on 1996-11-21
Implemented on 199705-01
Issued by the State Bureau of Technical Supervision
Verification Regulation of Focimeters JJG580—1996
Replaces JJG58—1988
This verification regulation was approved by the State Bureau of Technical Supervision in 1996 Approved on November 21, 1997, and implemented on May 1, 1997. Responsible unit: Shaanxi Provincial Technical Supervision Bureau Drafting unit: Shaanxi Provincial Metrology and Testing Institute The drafting unit is responsible for interpreting the technical provisions of this regulation. The main drafter of this regulation: Tang Guoan Mengjia Drafting person: JIG5an-1996 (Shaanxi Provincial Metrology and Testing Institute) [Shaanxi Provincial Metrology and Testing Institute) (Shaanxi Provincial Metrology and Testing Institute) [Xi'an Metrology and Testing Institute] (Xi'an Metrology and Testing Institute) -) Purpose (ii) Definition (iii) Classification J.I5801996 (iv) Focal length (V) Measurement range of the vertex power displayed on the meter
(VI) Scale interval
Technical requirements
Verification conditions
Verification items and verification methods
Verification results processing and verification period
Appendix 1 Verification certificate of focimeter (back side) format Appendix 2
Verification record sheet of focimeter
JIG560—1996
Verification procedure of focimeter
This regulation is applicable to the verification of focimeters newly manufactured, used and repaired under the following conditions
(I) Purpose
Focusometers are mainly used to measure the vertex power (D) and floor power (△) of base eyeglass lenses (including corneal contact lenses), determine the cylindrical axis direction of astigmatism lenses, print marks on uncut lenses, and check whether the lenses are correctly installed in the frames, etc.
（)Definition
1. 1. 2. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. 76. 77. 78. 79. 80. 81. 82. 83. 84. 85. 86. 87. 88. 89. 90. 91. 92. 93. 94. 95. 96. 97. 98. 99. 100. 101. 102. 103. 104. 105. 106. 107. 108. 109. 110. 111. 112. 113. 114. 115. 116. 117. 118. 119. 1 2 Spherical power
The back focal value of a spherical lens is called spherical power, symbol: aph (SPH), 3 Cylinder power
The value of the focal power of an astigmatism lens, symbol: Yl (CYL), Aperture lens is a lens that makes the near-axis parallel light rays converge into two separate mutually orthogonal focal points. This lens generally has two focal powers. 4 Prism power
JJG 5801996
The deflection of light from a specified point on the lens. The unit of prismatic power is n/m, and the unit name is prismatic power, which is represented by the symbol,
【San Anmi
Focus meter is divided into two types: continuous display type and digital speaker type. A continuous focal meter is a focal meter with a continuous scale; a digital focal meter is a digital display focal meter that converts the measured value into the nearest increment: (iv) The focal meter displays the focal value of the continuous focal meter. The focal meter uses a continuous color scale of 1, = 546.07nmm. (v) The measuring range of the focal value is at least -20[3-20D. The prism is at least 0-5°. The axial scale points of the lens are from 0\, -180\, and the axial direction of the base of the inspection film between 0°-·360\ can be determined. (vi) The interval between the continuous display focal meter and the scale interval of the position should not be less than 25, the scale interval of the position should not be greater than 5\, and the reading interval of the calibration lens should not be greater than 1△. For digital display focal meter, the digital display increment within the range of 1101)-11) shall not exceed 0.125D; in the range outside 10D, the digital display increment shall not exceed 0.25D. The scatter of the digital display value shall be at least 2 decimal places, and the digital display increment in the axial direction shall be 1. The digital display increment of the calibration degree shall not exceed 0.25a.
2 Technical requirements
1 The coordination of the movable parts of the focal meter shall be tight: the reading wheel shall rotate flexibly and the positioning shall be accurate: the adjustable baffle shall move smoothly: the printing mechanism shall rotate smoothly, the printing mark shall be clear, and the dot diameter shall not exceed 0.5mm1:2 The optical system of the focal meter shall have clear imaging, and the brightness of the screen and the reading window shall be uniform, especially oil stains, water droplets, damaged spots and other defects that obviously affect the reading. 3. The deviation between the low-focal meter scale disk and the center of the disk (at the end-effect lens, the 0°--10\ direction) shall not be greater than 0.1°. 4. The current error of the single-focal meter shall not be greater than 0.1°. 5. The scale of the continuous display focal meter shall be flat and even, the writing shall be clear and without broken lines, the scale and the index line shall be aligned, and different colors shall be used to distinguish the working light intensity. The positive and negative signs and the digital display of the digital display focal meter shall be complete and without broken lines, and the indication shall be stable without drift and flicker. 6. Requirements for the indication error of the spherical lens
61. For the focal meter with the same indication mode, the position error shall not exceed +0.03D. Among them, the focal meter with a graduation of 0.01T> shall have a spherical lens zero position and a spherical lens zero position indication after the specified warm-up time. 6.2 For various types of focal meters, the allowable error between the measured value of the standard lens and the standard value of the standard lens is shown in Table 1. 6.3 For digital diopter meters, if the diopter indication increment is 0.125D (within 10D) and .25D (outside 2-10D), the requirements for the indication error of the diopter shall be implemented in accordance with Table 1. 7.1 For various types of focal meters, the allowable error between the measured value of the diopter standard lens and the standard value of the standard lens is shown in Table 2-2: - 15
Comparison of the measurement disk: distance (1)
Unit: floor
Allowable error
7.2 For the focal meter with a digital display increment of 0.125△ or 0.25A, the calibration result of the focal meter shall refer to Table 2.
8 The deviation between the 180° direction (reference direction) of the axial position disk center and the axial mark shall not be greater than 19
The deviation between the axial mark of the lens optical center and the focal meter optical axis shall not be less than 0.4 m3
J.1G50—1996
1 The center can be adjusted and the position parallelism deviation with the axis scale center -1 direction shall not be greater than 13. Verification conditions
11 Standard lenses
Standard lenses are divided into 3 categories: spherical lenses, cylindrical lenses and cylindrical lenses, all of which should meet the corresponding technical requirements. 11.1 The specifications of spherical standard lenses are equipped according to the following requirements: ±2.513, ±5T), ±10[), ±15, ±20D, ±25D, a total of 12 types, and their different degrees are 0.02~-0.03L) 11.2 Floor standard lenses should be equipped with 22, 54, 10, 15 and 2, a total of 5 types. 11.3 Cylinder standard lenses should be equipped with F5L inverse cylindrical lenses, 121-degree measuring angles and a caliper with a minimum grid value of .211m. 13 Verification environment
Temperature: (20=5).
Relative fade: <85%.
Power supply voltage: -220V±10%.
This instrument should be placed in a clean room without direct sunlight. It should work smoothly. IV. Inspection items and inspection methods
14 Appearance inspection
After the focal meter is powered on, visually check it against the requirements in Articles 1, 2, and 3: If any of the following conditions occurs during the inspection, the device under inspection shall be deemed unqualified: 4.1 The reading handwheel cannot be accurately positioned.
14.2 The optical system is severely contaminated, there is an unclear image on the plate, and the scale lines are blurred. 14.3 The printing mechanism rotates the bed, and the printing function cannot be executed. Please do not print marks. 15 The following preparations must be made for the daylight meter. 15,1. If the examiner has any problems with vision correction, he/she must pay attention to the correction of his/her own vision. 15.2. The examiner must use the eyepiece ring of the focal meter to focus, so that it can clearly see the graticule pattern in the telescope to eliminate the visual error of the examiner. 15.3. After the graticule pattern is focused, the examiner moves the lens up, down, left, and right at the outer end of the eyepiece to make the relative movement of the marks on the graticule pattern not too large. If the focus is changed, it is necessary to refocus. 16. For the focal meter with a gear-assisted oil-light handwheel structure, when reading, it is necessary to read the value by rotating the handwheel in one direction. After measurement, the average value of the reading in a certain direction that deviates from the standard value is taken as the reading value of that point. 17. Verification of focal value indication
A set of spherical standard lenses are used to check the focal value of the focal meter. 17.1 Zero error
The focal value corresponding to the pre-focus indication when any standard lens is placed on the focal meter so that the standard image revealed by the instrument is clear is the zero error. The zero error shall not exceed the provisions of Article 6, 1. 17.2 Put the standard lenses on the focal meter one by one to measure the focal length. At least 3 data are read for each lens. Finally, the average value is used as the difference between the lens and the focal length. It is expressed as
. If the standard value of the standard lens is
, the zero error of the focal meter under test is:
d - D.. - D.
The value shall not exceed the provisions of Article 6.3 of Section 1.2. 18. Verification of prism value
Use a set of standard lenses to measure and verify the prism value of the focimeter. 18.1 When calibrating the prism value, first let the vertex power reading of the focimeter be zero. (1)
18.2 Place the standard prism meter on the lens support seat one by one and read the corresponding prism value. Each standard lens shall measure at least one data in the 0\ and 180\ directions, and take the value with the largest deviation as its distance measurement value, expressed as A. If the standard value of the standard lens is 0, then the prism value of the focimeter shall be: - 2. -4,
Its value is so small that it is closer to the value specified in Article 7.
190~180°Verification of the difference between the axial scale direction and the axial mark (2)
19,1 Place the rectangular standard lens on the support seat, adjust its position, and focus so that the bright line formed by the image of the cylindrical axis coincides with the 0\-180\ direction of the axial scale. Use a punching mechanism to punch a mark on the cylindrical surface. 19.2 The angle between the straight line connecting the three points of the mark and the base of the cylindrical standard lens shall not exceed the value specified in Article 8.
20 Verification of the verticality between the axial mark of the optical center of the lens and the optical axis of the focal meter uses a +15D spherical mark. When pushing the lens, first align the center and mark the center axis. After rotating the spherical lens 180 degrees, re-center it until the angularity is zero. And mark it. Half of the distance between the first and second center marks should not exceed the provisions in Article 9. 21 Verification of parallel deviation of adjustable baffle
Put the spherical lens on the lens support seat and tighten the adjustable baffle on the workpiece. Focus the spherical lens so that it is in the direction of 0"~1", move the spherical lens and the adjustable baffle together so that this bright line passes through the center of the scale. At this time, the angular difference between this bright line and the 0\~180 direction of the scale should not exceed the provisions in Article 10.
5. Processing of verification results and verification cycle
22. After verification, the focimeters that meet the requirements of this regulation shall be issued with a verification certificate; unqualified focimeters shall be issued with a verification result notification and prohibited from continued use.
23. After verification, the newly manufactured focimeters that do not meet the requirements of this regulation shall be deemed qualified. The focimeters in use or after repair shall be allowed to relax the allowable error of 2 times for Articles 8 and 10. The astigmatism control of the vertex power indication of 0.01LD digital burst mode is allowed to be no more than 0.4% during the verification. 24. The verification period of focimeter training is 1 year.
Appendix 1
Item Focal Power Indicator [3)
Correction (D)
Direct focimeter indication (】
Repair. Value [α]
.G580—1996
Focusometer calibration certificate (back) format
Calibration results
This instrument center is correct (unchanged when the lens is not changed
-1 mass disk axis position mark reading tape
Adjustable workbench parallelism carbon difference
The error between the lens optical center and the colorimeter optical axis is 110
: Let the test point be correct The three-dimensional value is the relative error of the item you use to indicate the error, that is, the error between the two and the correct value is dDe25
Appendix 2
This inspection form
Manufacturer name
Focusometer model
Appearance inspection
JJG580—199f
Focusometer calibration record
0°-1 Error between the seat and the axis mark
Parallelism of the adjustable three-dimensional workbench Lesson plan
Error between the optical center of the lens and the optical axis
(end glass)
Verification of the error of the focal value
Focal reduction of the standard lens
Average value
Correction value
Difference of the standard lens
Instrument number
Verifier
Blood drop value| |tt||Average value
Flash positive value
Prism of standard lens
Direction
JJGSn-1996
Verification of the error of the degree indication
Correction value
Using degree of standard lens
0' direction
Measurement tracking
18g interval
Warning value2 The angle between the straight line connected by the three points of the mark and the base of the cylindrical standard lens shall not exceed the provisions in Article 8.
20 The calibration of the axis mark of the optical center of the lens and the vertical deviation of the focal meter optical axis Use a +15D spherical standard lens, first align the center and mark the center axis. After rotating the spherical standard lens 180, concentric it again until the angularity is zero. And mark it. Half of the distance between the first and second center marks shall not exceed the provisions in Article 9. 21 Verification of parallel deviation of adjustable baffle
Put the spherical standard lens on the lens support seat and let the workpiece edge be tightly attached to the adjustable baffle. Focus the lens on the surface of the mark, so that it is in the direction of 0"~1", move the lens and the adjustment baffle together, so that this bright line passes through the center of the scale. At this time, the angular difference between the line and the 0\~180 direction of the scale should not exceed the provisions of Article 10.
V. Verification Result Processing and Verification Cycle
22 For the focal meter that meets the requirements of this regulation after verification, a verification certificate will be issued; for the unqualified thermometer, a verification result notification will be issued and it is prohibited to continue to use it.
23 New After the focal meter is determined, it will be determined that it will not meet the requirements of the technical fee in this regulation. It will be determined as a qualified one. The focal meter in use or after repair can relax the allowable error of 2 times for Articles 8 and 10. The astigmatism control of the 0.01LD digital burst mode is not greater than 0.4 in the vertex focal value calibration. The focal training calibration period is 1 year.
Appendix 1
Item focal value [3)
Correction (D)
Direct reference focal value (】
Repair. Value [α]
.G580—1996
Focusometer calibration certificate (back) format
Calibration results
This instrument center is correct (unchanged when the lens is not changed
-1 mass disk axis position mark reading tape
Adjustable workbench parallelism carbon difference
The error between the lens optical center and the colorimeter optical axis is 110
: Let the test point be correct The three-dimensional value is the relative error of the item you use to indicate the error, that is, the error between the two and the correct value is dDe25
Appendix 2
This inspection form
Manufacturer name
Focusometer model
Appearance inspection
JJG580—199f
Focusometer calibration record
0°-1 Error between the seat and the axis mark
Parallelism of the adjustable three-dimensional workbench Lesson plan
Error between the optical center of the lens and the optical axis
(end glass)
Verification of the error of the focal value
Focal reduction of the standard lens
Average value
Correction value
Difference of the standard lens
Instrument number
Verifier
Blood drop value| |tt||Average value
Flash positive value
Prism of standard lens
Direction
JJGSn-1996
Verification of the error of the degree indication
Correction value
Using degree of standard lens
0' direction
Measurement tracking
18g interval
Warning value2 The angle between the straight line connected by the three points of the mark and the base of the cylindrical standard lens shall not exceed the provisions in Article 8.
20 The calibration of the axis mark of the optical center of the lens and the vertical deviation of the focal meter optical axis Use a +15D spherical standard lens, first align the center and mark the center axis. After rotating the spherical standard lens 180, concentric it again until the angularity is zero. And mark it. Half of the distance between the first and second center marks shall not exceed the provisions in Article 9. 21 Verification of parallel deviation of adjustable baffle
Put the spherical standard lens on the lens support seat and let the workpiece edge be tightly attached to the adjustable baffle. Focus the lens on the surface of the mark, so that it is in the direction of 0"~1", move the lens and the adjustment baffle together, so that this bright line passes through the center of the scale. At this time, the angular difference between the line and the 0\~180 direction of the scale should not exceed the provisions of Article 10.
V. Verification Result Processing and Verification Cycle
22 For the focal meter that meets the requirements of this regulation after verification, a verification certificate will be issued; for the unqualified thermometer, a verification result notification will be issued and it is prohibited to continue to use it.
23 New After the focal meter is determined, it will be determined that it will not meet the requirements of the technical fee in this regulation. It will be determined as a qualified one. The focal meter in use or after repair can relax the allowable error of 2 times for Articles 8 and 10. The astigmatism control of the 0.01LD digital burst mode is not greater than 0.4 in the vertex focal value calibration. The focal training calibration period is 1 year.
Appendix 1
Item focal value [3)
Correction (D)bzxZ.net
Direct reference focal value (】
Repair. Value [α]
.G580—1996
Focusometer calibration certificate (back) format
Calibration results
This instrument center is correct (unchanged when the lens is not changed
-1 mass disk axis position mark reading tape
Adjustable workbench parallelism carbon difference
The error between the lens optical center and the colorimeter optical axis is 110
: Let the test point be correct The three-dimensional value is the relative error of the item you use to indicate the error, that is, the error between the two and the correct value is dDe25
Appendix 2
This inspection form
Manufacturer name
Focusometer model
Appearance inspection
JJG580—199f
Focusometer calibration record
0°-1 Error between the seat and the axis mark
Parallelism of the adjustable three-dimensional workbench Lesson plan
Error between the optical center of the lens and the optical axis
(end glass)
Verification of the error of the focal value
Focal reduction of the standard lens
Average value
Correction value
Difference of the standard lens
Instrument number
Verifier
Blood drop value| |tt||Average value
Flash positive value
Prism of standard lens
Direction
JJGSn-1996
Verification of the error of the degree indication
Correction value
Using degree of standard lens
0' direction
Measurement tracking
18g interval
Warning value
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