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GB/T 7257-2013 English PDF

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Q: Should I purchase the latest version GB/T 7257-2013?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7257-2013 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$329.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 7257-2013: Measurement methods of parameter for helium-neon laser
Status: Valid

GB/T 7257: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7257-2013	329	Add to Cart	3 days	Measurement methods of parameter for helium-neon laser	Valid
GB/T 7257-1987	359	Add to Cart	3 days	Measurement methods of parameter for helium neon laser	Obsolete

Similar standards

GB/T 7247.1 GB/T 18490.1 GB/T 30117.2 GB/T 7247.4 GB/T 7247.3

Basic data

Standard ID: GB/T 7257-2013 (GB/T7257-2013)
Description (Translated English): Measurement methods of parameter for helium-neon laser
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L51
Classification of International Standard: 31.260
Word Count Estimation: 14,170
Older Standard (superseded by this standard): GB/T 7257-1987
Quoted Standard: GB 7247.1; GB/T 15175-2012; GB/T 15313-2008
Regulation (derived from): National Standards Bulletin No. 25 of 2013
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the method for measuring the main parameters of helium-neon laser. This standard applies to a helium-neon laser (hereinafter referred to as "laser").

GB/T 7257-2013: Measurement methods of parameter for helium-neon laser

---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.
Measurement methods of parameter for helium-neon laser ICS 31.260 L51 National Standards of People's Republic of China Replacing GB/T 7257-1987 He-Ne laser measurement methods Issued on. 2013-12-17 2014-05-15 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 2 General requirements 4.1 Measuring environment 2 4.2 measurement apparatus 2 4.3 Security 2 4.4 test laser 2 4.5 Preparation for measurement 2 5 Measurement 3 5.1 Warm-up time 3 5.2 ignition voltage 3 5.3 rated current 3 5.4 drop 4 5.5 Output Power 4 5.6 output power instability 5 6 5.7 Wavelength 5.8 spectral width 7 5.9 beam displacement 7 5.10 beam diameter 8 5.11 beam pointing instability 8 5.12 fundamental transverse mode 8 5.13 degree of polarization 9 6 sources of measurement error 10

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 7257-1987 "Test Method for helium-neon laser parameters." This standard 7257-1987 major changes compared to the GB/T as follows. --- "General optical parameters" to "Specifications" (see Chapter 1, GB/T 17257-1987 of the paragraph); --- Added "Normative references" (see Chapter 2); --- Edit "warm-up time" is defined as, "the best operating current" to "rated current" Delete "output power instability" and The definition of "degree of polarization" (see 3.1 ~ 3.6, GB/T 7257-1987 of 2.1,3.1,4.1,5.1,6.1,7.1,8.1,9.1,10.1); --- The "relative humidity of 45% to 75%" to "25% to 75%," adds "arbitration measure atmospheric conditions" (see 4.1.1, 4.1.2, GB/T 7257-1987 1.7); --- "Output power instability" and "polarization" of the measuring instrument to "laser power" (see 5.6,5.13, GB 7257-1987 7.2 ~ 7.5,10.2 ~ 10.4); --- "Output power instability" measurement method to increase direct measurement (see 5.6.4); --- Increase the standard deviation "output power instability" notation (see 5.6.3.7); --- "Beam displacement" measuring instruments to "position measuring instrument" (see 5.9, GB/T 7257-1987 of 8.2 to 8.4); --- "Polarization" is replaced by the power represented (see 5.13.3.3,5.13.3.4, GB/T 7257-1987 10.3); --- "Output" and the number "output power instability" measurements are replaced by "≥10 times" (see 5.5.3.3,5.6.3.3, GB/T 7257-1987 of 6.3.3,7.3.3); --- Increase "Wavelength" measurement method (see 5.7); --- Increase "spectral width" measurement method (see 5.8); --- Add "beam diameter" measurement method (see 5.10); --- Delete "firing voltage" and "pressure drop" measurement principle figure "DC ammeter", "Laser Power Meter" (GB/T 7257-1987 Figure 1, Figure 3); --- Delete "fundamental transverse mode" measuring device photodetector, an amplifier, a signal generator (GB/T 7257-1987 9.2). The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. The standard by the China Electronics Standardization Institute. This standard was drafted. Institute of Electronics, Daheng Technology Co., Ltd., China Electronics Technology Group Corporation Division XI Institute. The main drafters of this standard. Zhong Yanhong, Ma Ning, Bai Yonggang, SUN Dian in. This standard replaces the standards previously issued as follows. --- GB/T 7257-1987. He-Ne laser measurement methods

1 Scope

This standard specifies the method for measuring the main parameters of the helium-neon laser. This standard applies to helium-neon laser (hereinafter referred to as "laser").

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 7247.1 Safety of laser products - Part 1. Equipment classification, requirements GB/T 15175-2012 main parameters of solid-state laser measurement method GB/T 15313-2008 Laser term

3 Terms and Definitions

GB/T 15313-2008 define the following terms and definitions apply to this document. 3.1 Warm-up time warm-uptime Specific parameter index starting laser ignition timing from a given operating current, to meet product standards required (usually output power , Output power stability or spectral width) of the desired interval. 3.2 Ignition voltage dischargevoltage When the laser discharge tube ignition, the minimum required voltage between the electrodes. 3.3 Rated current ratedcurrent Laser output power to a current value of rated power. 3.4 Tube voltage drop voltagedrop Laser at a given operating current, discharge voltage between the two electrodes. 3.5 Output power outputpower In a predetermined pattern and a specified wavelength lasers at a given operating current at the output of the laser output power. 3.6 Beam displacement beammaximalexcursion Within the specified time frame, the spot center of the largest off-axis angle. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 7257-2013_English be delivered?

Answer: Upon your order, we will start to translate GB/T 7257-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 7257-2013_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 7257-2013_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 GB/T 7257-2013?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7257-2013 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.