GA/T 1243-2015 English PDF

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GA/T 1243-2015: Technical specifications for latent fingerprint development by optical examination in forensic science
Status: Valid

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Basic data

Standard ID: GA/T 1243-2015 (GA/T1243-2015)
Description (Translated English): Technical specifications for latent fingerprint development by optical examination in forensic science
Sector / Industry: Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard: A92
Classification of International Standard: 13.310
Word Count Estimation: 6,686
Date of Issue: 2015-02-11
Date of Implementation: 2015-02-11
Quoted Standard: GA/T 144-1996
Regulation (derived from): Notice on Publication of Public Safety Industry Standard (Year 2015); Industry Standard Record Announcement No. 2016 (No. 197)
Issuing agency(ies): Ministry of Public Security
Summary: This standard specifies the principle, equipment, environmental requirements, inspection methods and precautions of common fingerprints for optical inspection. This standard applies to the use of photopsist face on sweat fingerprints, dust fingerprints, blood fingerprints, fingerprints and other hand fingerprints of oil testing.

GA/T 1243-2015: Technical specifications for latent fingerprint development by optical examination in forensic science

---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.
Technical specifications for latent fingerprint development by optical examination in forensic science ICS 13.310 A92 People 's Republic of China Public Security Industry Standard Technical code for forensic optical inspection fingerprints Released by.2015-02-11 2015-02-11 implementation Issued by the Ministry of Public Security of the People 's Republic of China

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The release of this document The Agency does not assume responsibility for identifying these patents. This standard by the National Criminal Technology Standardization Technical Committee Fingerprint Inspection Standardization Subcommittee (SAC/TC179/SC3) to mention Out of charge. The drafting unit of this standard. Chongqing Public Security Bureau Interpol Corps, the Ministry of Public Security evidence center. The main drafters of this standard. Bai Shengxue, Liu Huan, Chang Bainian, Li Xiaojun. Technical code for forensic optical inspection fingerprints

1 Scope

This standard specifies the principle, equipment, environmental requirements, inspection methods and precautions of common handprints for optical inspection. This standard applies to the use of light inspection method for sweat fingerprints, dust fingerprints, fingerprints, grease fingerprints and other fingerprints of the test.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Glossary of Terms for Fingerprinting

3 terms and definitions

GA/T 144-1996 Definitions and the following terms and definitions apply to this document. 3.1 Optical inspection technique Illuminate the object to be inspected with light, and adjust the brightness distribution of the control object by selecting the incident angle and direction of the illumination light technology. 3.2 Directional reflection lighting technology directionalreflectionilumination And a technique of observing the reflected light intensity distribution of the object to be inspected in the direction of the reflection angle equal to the incident angle of the illumination light. 3.3 Uniform lighting technology uniformilumination The object is irradiated with a plurality of identical light sources at an angle of 45 ° to observe the object's reflected light intensity distribution in the vertical direction. Uniform illumination Should be so that the various parts of the object by the uniform exposure, does not produce significant lighting shadows. 3.4 Dark field lighting technology darkfieldilumination The illumination light illuminates the object to be inspected at an incident angle of 10 ° to 30 °, and observes the object's reflected light intensity distribution in the vertical direction. 3.5 Side light lighting technology sidelighting The illuminated light illuminates the object to be inspected from one side at an incident angle of 60 ° to 80 °, observing the object's reflected light intensity distribution in the vertical direction technology. 3.6 Grazing injection lighting technology grazingincidentlighting The illuminated light illuminates the object to be inspected at an incident angle of 80 ° to 90 ° and observes the reflected light intensity distribution of the object in the vertical or oblique direction Technology. 3.7 Vertical transmission illumination technology verticaltransimittedilumination The illumination light is incident perpendicularly from the back of the object to be inspected, and the object transmits the brightness distribution in the vertical direction of the object. ......

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