JJG 952-2014 English PDF

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JJG 952-2014: Verification Regulation of Pupil Distance Meters
Status: Valid

JJG 952: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 952-2014	419	Add to Cart	3 days	Verification Regulation of Pupil Distance Meters	Valid
JJG 952-2000	479	Add to Cart	4 days	Verification Regulation of Pupil Distance Meters	Obsolete

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Basic data

Standard ID: JJG 952-2014 (JJG952-2014)
Description (Translated English): Verification Regulation of Pupil Distance Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Classification of International Standard: 17.040
Word Count Estimation: 18,133
Date of Issue: 6/15/2014
Date of Implementation: 12/15/2014
Older Standard (superseded by this standard): JJG 952-2000
Quoted Standard: JJF 1059.1-2012; GB/T 26397-2011
Regulation (derived from): The State Administration of Quality Supervision, Inspection and Quarantine Notice No. 64 of 2014
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This Standard specifies the Centrometer initial verification, verification and subsequent use of checks.

JJG 952-2014: Verification Regulation of Pupil Distance Meters

---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 Pupil Distance Meters State verification procedures People's Republic of China Centrometer Issued on. 2014-06-15 2014-12-15 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Centrometer verification procedures ofPup Replacing JJG 952-2000 Focal point. the National Technical Committee on Medical Measurement The main drafting units. China Institute of Metrology Participated in the drafting unit. Hangzhou quality technical supervision detection hospital This procedure entrust the National Technical Committee is responsible for interpreting medical measurement The main drafters of this procedure. Sun Jie (China Institute of Metrology) Hu Zhixiong (China Institute of Metrology) Drafters participate. Zhu Jianping (China Institute of Metrology) Xu Congen (Hangzhou Quality and Technical Supervision and Inspection Institute)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Terms (1) 3.1 IPD (1) 3.2 Basic eye position (1) 3.3 monocular pupillary distance (1) 3.4 Centrometer (1) 4 Overview (1) 5 metering performance requirements (2) 5.1 IPD indication error (2) 5.2 asymmetry error (2) 5.3 rounding error (2) 6 General Requirements (2) 6.1 appearance requirements (2) 6.2 illumination uniformity (3) 6.3 Measurement Capability (3) 7 control of measuring instruments (3) 7.1 test conditions (3) 7.2 Verification Project (3) 7.3 Verification Methods (3) 7.4 test results processing (4) 7.5 test cycle (4) Appendix A Centrometer original records (recommended format) (5) Appendix B Centrometer calibration certificate/test results notice (inside) (recommended format) (6) C Appendix Centrometer standard calibration device (9) Appendix D IPD IPD instrument indication error test results Measurement Uncertainty Example (10)

Introduction

The procedures in place JJG 952-2000 "Centrometer." This procedure is based on the JJG 952-2000 reference JJF1002-2010 "national verification procedures write rules", GB/T 26397-2011 "light academic ophthalmology The term "revised. Compared with JJG 952-2000 "Centrometer", except in accordance with JJF1002-2010 "national verification procedures compiled Write Rules "section made of the composition and modify the formatting on the outside, the main technical changes are as follows. --- Increasing the reference document (see 2); --- Increasing the term (see 3); --- Modify an overview of some of the text representation (see 4); --- IPD revised the measurement range requirements (see 6.3.2); --- Adds rounding error applies Centrometer description (see 7.3.2.3); --- Revised as close to the theoretical value of the IPD IPD as far obtained (see 7.3.2.3); --- Modify the test results processing textual representation (see 7.4); --- Modify the test records recommended format (see Appendix A); --- Modified Centrometer test certificate (in-page) format, an increase of illumination uniformity (see Appendix B); --- Increased Centrometer standard calibration device related content (see Appendix C); --- Increased Centrometer IPD indication error test results Measurement Uncertainty Example (see Appendix D); --- Adjustment Appendix order. The previous regulations published case. --- JJG 952-2000. Centrometer verification procedures

1 Scope

The order applies to Centrometer initial verification, use and subsequent verification check. 2. References This procedure refers to the following documents. JJF1059.1-2012 Evaluation and Expression of Uncertainty in Measurement GB/T 26397-2011 Ophthalmic optics terminology For dated references, only the dated edition applies to this procedure; undated reference documents Member, the latest edition (including any amendments) applies to this procedure.

3 Terms

3.1 IPD interpupilarydistance Eyes flat as the front of the goal of infinity, the distance between the centers of two pupils. 3.2 Basic eye position primaryposition Human eye level in front of the goal, the relative position of the head of the human eye for. 3.3 Unilateral IPD monocularpupilarydistance In the basic eye position, the pupil center and the bridge of the nose or frames from the midline of the human eye. 3.4 Centrometer pupildistancemeter In the process of optometry for a method of measuring the distance between the eyes of two instruments Pupillometry people.

4 Overview

Centrometer is an instrument used to measure the human eye pupil distance. Centrometer mainly composed of four parts raster display and control systems, optical systems, electromechanical systems and software, etc., With IPD, unilateral IPD IPD and different working distance measurement function, is a light, mechanical, electrical integration instrument. IPD instrument measuring principle. illuminated by the light source as the standard by the imaging optical system in front of a particular test personnel Work at a distance, when the measured person watching as the standard, the left and right eye visual axis intersect at this particular working distance. In this case the measured light on people around the cornea to form a reflective surface of each point. Optometrist can look through the eyepiece at the same time To reading gossamer and two reflex points, moving left and right, respectively aligned with gossamer reading test after officers left and right eye reflex points, It can get tested IPD officers on the display. According to the principle of optometry, measuring just far Centrometer measured IPD staff in recent IPD can be obtained by conversion. I.e. Infinity measured after work gear away IPD test personnel to choose the right near working distance measured according to the situation of persons Off and transferred to the corresponding work gear, reading on the display at this time is to test the staff in the near working distance Near IPD. In practice, the situation should be based on the measured nearly IPD personnel and reference data and real Centrometer ......

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