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JJG 28-2019 English PDF

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Upon your order, we will start to translate JJG 28-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.

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Q: Should I purchase the latest version JJG 28-2019?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 28-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$789.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 28-2019: Optical Flats
Status: Valid

JJG 28: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 28-2019	789	Add to Cart	7 days	Optical Flats	Valid
JJG 28-2010	RFQ	ASK	3 days	Verification Regulation of Cigarette Making Machine Cigarette Weight Microwave Detection System
JJG 28-2000	RFQ	ASK	6 days	Optical Flat	Obsolete
JJG 28-1991	RFQ	ASK	3 days	(Chinese Industry Standard)	Obsolete

Similar standards

JJG 517 JJG 0061 JJG 5 JJG 34 JJG 24 JJF 028

Basic data

Standard ID: JJG 28-2019 (JJG28-2019)
Description (Translated English): Optical Flats
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Classification of International Standard: 17.040
Word Count Estimation: 34,378
Date of Issue: 2019
Date of Implementation: 2020-03-27
Issuing agency(ies): State Administration for Market Regulation

JJG 28-2019: Optical Flats

---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.
Optical Flats National Measurement Verification Regulations of the People's Republic of China Flat crystal 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Flat Crystal Verification Regulations Replace JJG 28-2000 Centralized unit. National Technical Committee for Geometric Engineering Parameter Measurement Main drafting unit. Hunan Institute of Metrology and Testing Chinese Academy of Metrology Participated in the drafting unit. Suzhou Huili Instrument Co., Ltd. 205th Research Institute of China Ordnance Industry This regulation entrusts the National Geometric Engineering Parameter Measurement Technical Committee to explain The main drafters of this regulation. Chen Yong (Hunan Provincial Institute of Metrology and Testing) Zhang Heng (Chinese Academy of Metrology) Zeng Yan (Hunan Provincial Institute of Metrology and Testing) Liu Lijuan (Hunan Provincial Institute of Metrology and Testing) Participating drafters. Han Sen (Suzhou Huili Instrument Co., Ltd.) Bai Wenqi (Hunan Institute of Metrology and Testing) Shengyun Wang (205th Research Institute of China Ordnance Industry)

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Measurement performance requirements (3) 4.1 Parallelism (3) 4.2 Flatness of working surface (3) 4.3 Flatness of non-working surface (4) 4.4 Stability (4) 5 General technical requirements (5) 5.1 Appearance and surface quality (5) 5.2 Dimensions (5) 5.3 The position of the cross-line of the flat crystal (6) 5.4 Angle between two ends (6) 5.5 The perpendicularity of the working surface and the cylindrical generatrix (7) 6 Control of measuring instruments (7) 6.1 Verification items and main verification equipment (7) 6.2 Verification conditions (7) 6.3 Verification method (9) 6.4 Processing of verification results (12) 6.5 Verification period (12) Appendix A Dimensions and Quantity of Flat Surface Defects (13) Appendix B. Phase-shift laser equal-thickness interferometry (15) Appendix C. Equal thickness interferometry (18) Appendix D Isoclinic Interferometry (20) Appendix E Data Processing Examples of Veritable Flat Crystals Tested by the Four-sided Mutual Inspection Method (22) Appendix F. Deformation of Changping crystal by its own weight (25) Appendix G Format of the inner pages of the verification certificate and verification result notification (27)

Introduction

JJF1001-2011 "General Metrology Terms and Definitions", JJF1002-2010 "National Metrology Verification Regulations "Rules", JJF1059.1-2012 "Measurement Uncertainty Evaluation and Representation" together form the basis for the revision of this code Basic series of technical regulations. Compared with JJG 28-2000 "Flat Crystal", the main technical changes are as follows. --- Corrected the printing error of JJG 28-2000 "Flat Crystal". JJG 28-20006.3.8.2b) Chinese formula (6). u2 = 12u1 And the correction is. ub = 12ua [See current edition Formula (5)]; JJG 28-2000 Appendix C, Table C.1, Table 8 Header Column 8.Ei = (Li/Ln) Kn, corrected as. Ei = (Li/Ln) ΔKn (see current table E.1); JJG 28-2000 Appendix D Chinese formula (D.2). ΔF = d ÷ × F96, corrected as. ΔF = × F96 [See current layout (C.2)]. --- The difference of flatness of the 310mm long flat crystal in two cycles of verification is relaxed from 0.020μm to 0.030μm (see 4.4). --- According to JJG 146-2011 "Measuring Block", 6 equivalent blocks were cancelled and 5 equivalent blocks were replaced (see 6.3.2). --- Cancelled the method of parallel parallel crystal parallelism verification on laser plane equal thickness interferometer. --- Increase the structure overview, measurement method (see Appendix B) and other related contents of the phase shift type equal thickness measuring device. --- Add the calculation method of flatness within the range of standard flat crystal F96 (see Appendix C) The release of previous versions of this regulation. --- JJG 28-2000; --- JJG 28-1991; --- JJG 28-1980. Flat Crystal Verification Regulations

1 Scope

This regulation is applicable to the first verification, subsequent verification and flat verification of flat crystals (including flat flat crystals, parallel flat crystals and long flat crystals) Check in use.

2 Reference documents

This regulation refers to the following documents. GB/T 903-2019 colorless optical glass JB/T 7401-1994 Flat flat crystal JB/T 7402-1994 parallel flat crystal ISO 14999-4..2015 (E) Interferometer measurement of optical and photonic optics and optical systems Section 4 Part. Tolerance description and evaluation clearly specified in ISO 10110 (Optics and photonics-Interfero- metricmeasurementofopticalelementsandopticalsystems-Part 4.Interpretationand evaluationoftolerancesspecifiedinISO 10110) For dated references, only the dated versions are applicable to this Regulation; for those without dates The latest version (including all amendments) is applicable to this regulation.

3 Overview

Pingjing is a measuring instrument that measures flatness, straightness, fit and parallelism using the light wave interference method, including flatness Face flat crystal, parallel flat crystal and long flat crystal. Planar flat crystals can be divided into single working plane flat crystals and double working plane flats according to the number of working faces The shape of the crystal is shown in Figure 1; according to the purpose, it can be divided into two categories. standard flat crystal and working flat crystal. First and second grades, working flat crystals are divided into first and second grades. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 28-2019_English be delivered?

Answer: Upon your order, we will start to translate JJG 28-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 28-2019_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 28-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 28-2019?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 28-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.