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JJG 580-2005 English PDF

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JJG 580-2005: Verification Regulation of Focimeters
Status: Valid

JJG 580: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 580-2005	English	779	Add to Cart	5 days [Need to translate]	Verification Regulation of Focimeters	Valid	JJG 580-2005
JJG 580-1996	English	519	Add to Cart	4 days [Need to translate]	Verification Regulation of Focimeters	Obsolete	JJG 580-1996
JJG 580-1988	English	RFQ	ASK	3 days [Need to translate]	Focimeters	Obsolete	JJG 580-1988

PDF similar to JJG 580-2005

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Basic data

Standard ID	JJG 580-2005 (JJG580-2005)
Description (Translated English)	Verification Regulation of Focimeters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A60
Classification of International Standard	17.180
Word Count Estimation	30,349
Date of Issue	2005-12-20
Date of Implementation	2006-06-20
Older Standard (superseded by this standard)	JJG 580-1996
Quoted Standard	GB 17341; JJG 2090; ISO 9342-2; TERS-PART 2
Adopted Standard	OIML R93, MOD; ISO 9342-2, NEQ
Summary	This standard is applicable for measuring spectacle lenses and contact lens measurement of both purposes focimeter initial verification, testing and use of follow-up inspection. The type focimeter evaluation on the measurement of the performance requirements can be performed with reference to the rules.

JJG 580-2005: Verification Regulation of Focimeters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Verification Regulation of Focimeters National Metrology Verification Regulations of the People's Republic Power meter Focimeters Released on December 12,.2005 2006-06-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 580-1996 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on December 20,.2005, and Implemented on June 20,.2006. Focal Point. National Optical Metrology Technical Committee Drafted by. China Institute of Metrology This procedure entrusts the National Optical Metrology Technical Committee to explain The main drafters of this procedure. Wang Liru (China Institute of Metrology) Participate in the drafters. Zhang Jizhen (China Institute of Metrology) Liu Wenli (China Institute of Metrology) Ma Zhenya (China Institute of Metrology) Jiang Shifeng (China Institute of Metrology)

1 Scope (1) 2 Citations (1) 3 terms and units of measurement (1) 3.1 Power Meter (1) 3.2 Rear apex (1) 3.3 Lens holder (1) 3.4 Prism (1) 3.5 ball lens (1) 3.6 column lens (2) 3.7 Non-linearity error of the power meter (autofocus principle) (2) 3.8 Center error of the power meter (manual focus principle) (2) 4 Overview (2) 4.1 Measurement principle (2) 4.2 Classification (4) 4.3 Level (4) 4.4 Use (4) 4.5 Reference wavelength (4) 5 Metrological performance requirements (4) 5.1 apex indication error (4) 5.2 Nonlinear error (5) 5.3 Prism indication error (5) 5.4 Measurement repeatability of the primary standard power meter (5) 5.5 Center error (5) 5.6 Axis mark deviation (5) 5.7 Lens optical center mark deviation (5) 5.8 Adjustable baffle parallelism deviation (5) 6 General technical requirements (6) 6.1 Appearance requirements (6) 6.2 Mechanical Structure (6) 6.3 Measuring range (6) 6.4 Print Mark (6) 6.5 parallax (7) 6.6 Support structure (7) 7 Measuring instrument control (7) 7.1 Verification conditions (7) 7.2 Verification project (8) 7.3 Verification method (9) 7.4 Processing of verification results (11) 7.5 Verification cycle (11) Appendix A Photometer (Special for Glasses) Verification Certificate (inside page) format (12) Appendix B Proofometer (Special for contact lens) (inside page) format (13) Appendix C Photometer (Special for Glasses) Verification Record (14) Appendix D Photometer (Special for contact lens) verification record (16) Appendix E Uncertainty Analysis of the Measurement of the Power of the Power Meter (18) Pyrometer verification procedure This procedure is modified to adopt the content of OIMLR93 international recommendations, and some of them adopt ISO 9342-2 international standards. content.

1 Scope

This procedure is applicable to the first verification and follow-up of the power meter for measuring both the spectacle lens and the measuring contact lens. Verification and in-use inspection. The requirements for metrological performance in the type evaluation of the power meter can be performed with reference to this specification.

2 Citations

Focimeters, InternationalRecommendation, OIMLR93Edition1999 (E) GB 17341-1998 "Photometer" JJG 2090-1994 "Top Focus Measuring Instrument Verification System" ISO 9342-2.2005 Ophthalmicopticsandinstruments-Testlensesforcalibration offocimeters-Part 2. Testlensesforfocimetersusedformeasuringcontactlenses Use of this procedure should take care to use the current valid version of the above cited documents.

3 terms and units of measure

3.1 power meter Used to measure the apex power and prism power of spectacle lenses (including contact lens) to determine the optics of the lens Heart, axis position and print mark, check whether the lens is correctly mounted on the measuring instrument in the frame. The power meter is divided into two types for measuring the spectacle lens and measuring the contact lens according to the measuring object. 3.2 rear apex The reciprocal of the paraxial focal length of the lens near the axis measured in meters. The distance from the apex to the back focus of the lens is called the back top. The focal length (see Figure 1) is indicated by the symbol lf', and its reciprocal is called the back apex, or 1/lf'. Representation of rear apex The bit is the reciprocal of the meter, the dimension is m-1, and the unit name is diopter, denoted by the symbol D. One lens contains both front and back apex. Unless otherwise specified, the top power of the spectacle lens refers to the top of the lens. Power. 3.3 lens support The instrument is used to place the lens or contact lens to be tested, and the support with a clear aperture. The power meter measures the top power of the lens on the side of the support. 3.4 prismatic degree The deviation of light as it passes through a particular point in the lens. The unit of prism is expressed in centimeters per meter. (cm/m), the unit name is "prism diopter", denoted by the symbol Δ. 3.5 ball lens A lens that converges a paraxial parallel beam onto a focal point.

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