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GA/T 1200-2014 English PDF

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GA/T 1200-2014: Methods for examination of light distribution of evidence photography in forensic science

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GA/T 1200-2014	English	249	Add to Cart	3 days [Need to translate]	Methods for examination of light distribution of evidence photography in forensic science		GA/T 1200-2014

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Basic data

Standard ID	GA/T 1200-2014 (GA/T1200-2014)
Description (Translated English)	Methods for examination of light distribution of evidence photography 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	7,778
Date of Issue	2014-10-24
Date of Implementation	2014-10-24
Quoted Standard	GA/T 540-2005
Regulation (derived from)	Notice on Publication of Public Safety Industry Standard (Year of 2014); Industry Standard Record Announcement No. 4 of 2015 (No. 184)
Issuing agency(ies)	Ministry of Public Security
Summary	This standard specifies the vertical directional reflection lighting technology, the small deflection angle directional reflection lighting technology, dark field lighting technology, uniform lighting technology, side lighting technology, grazing people l

GA/T 1200-2014: Methods for examination of light distribution of evidence photography in forensic science

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Methods for examination of light distribution of evidence photography in forensic science ICS 13.310 A92 People's Republic of China Public Security Industry Standards Forensic evidence photographic light test methods Issued on. 2014-10-24 2014-10-24 implementation People's Republic of China Ministry of Public Security

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard by the National Standardization Technical Committee Criminal Criminal photographic recording technology Standardization Technical Committee (SAC/TC179/SC5) mention And the focal point. This standard was drafted. Chinese People's Public Security University, Liaoning Police Academy. Drafters of this standard. Yang Yuzhu, Li Chunyu, Atletico Madrid. Forensic evidence photographic light test methods

1 Scope

This standard specifies the vertically oriented reflective lighting technology, small reflection angle directional lighting technology, dark field illumination technology, uniform illumination technology, Side-lighting technology, lighting technology grazing incidence, shadowless lighting technology, the transmission side lighting technology, lighting technology coaxial transmission nine kinds of commonly used light Definition of inspection techniques, camera points and applications. This standard applies to forensic science evidence photography.

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. GA/T 540-2005 criminal photography directing mirrors

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Vertical Reflective lighting technology verticalreflectivelightingtechnology So that the illumination light incident vertically to the surface of the object, a camera lens receiving the illumination light reflected by a surface of the brightness distribution in the vertical direction method. 3.2 Small reflection angle directional lighting technology smalanglespecularlightingtechnology Let illuminating light is incident at a shallow angle to the surface, the camera lens to receive light reflected by a surface in a direction corresponding to the angle of reflection The method of distribution of lighting. 3.3 Dark-field illumination technology darkfieldlightingtechnology So that the illumination light with a small incident angles being surveyed surface, the camera lens receiving surface in the vertical direction diffusely In the vertical component of the emitted light intensity distribution of the light illuminating method. 3.4 Uniform lighting technology uniformlightingtechnology A plurality of light sources is the irradiation angle of 45 ° symmetry test object, the camera lens in a vertical direction to receive the object surface reflected light luminance distribution Cloth illumination methods. 3.5 Side-lighting technology sidelightingtechnology So that the illumination light with a large incident angle is irradiated from one side of the test object, the camera lens receiving surface in a direction perpendicular trans The method of incident light illumination brightness distribution. 3.6 Grazing incidence illumination technology grazingincidencelightingtechnology Let illumination light approximately parallel to the angle of incidence is examined from one side surface of the irradiation object is checked, the camera lens in the vertical

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