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GB/T 27509-2011 English PDF

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GB/T 27509-2011: Overhead projectors -- Projection stages dimensions
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Basic data

Standard ID GB/T 27509-2011 (GB/T27509-2011)
Description (Translated English) Overhead projectors -- Projection stages dimensions
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N45
Classification of International Standard 37.040.10
Word Count Estimation 9,940
Date of Issue 2011-10-31
Date of Implementation 2012-01-01
Adopted Standard ISO 7943-1-1987, MOD
Regulation (derived from) Announcement of Newly Approved National Standards No. 15 of 2011
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 type A (250mm �� 250mm) and B (285mm �� 285mm) transmissive projector screen projection Taiwan area size, pin position, size and formation zone size and position of the projection head support rod, two kinds of countertops projector significant difference is that the screen size of the area. This standard applies to Type A (250mm �� 250mm) and B (285mm �� 285mm) transmissive projector. This standard is compatible with both the table and their projector transparencies, does not apply to other special-purpose projector, projection does not include such radiographs using special equipment.

GB/T 27509-2011: Overhead projectors -- Projection stages dimensions

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Overhead projectors. Projection stages dimensions ICS 37.040.10 N45 National Standards of People's Republic of China Transmissive projection projector table size (ISO 7943-1. 1987, Photography-Overheadprojectors-Part 1. Projectionstages-Dimensions, MOD) Issued on. 2011-10-31 2012-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 7943-1. 1987 "photography transmissive projection - Part 1. Projection table size." This standard and ISO 7943-1. 1987 The main differences are as follows. --- Deleted international standards foreword; --- Remove the introduction of international standards; --- Modify the scope statement. Whole article according to China Standard GB/T 1.1-2000 make editorial changes. The standard proposed by China Machinery Industry Federation. This standard is under the jurisdiction of Machinery Industry movies and audio-visual machinery Standardization Technical Committee (TC4). This standard was drafted. Qinhuangdao Audio-Visual Machinery Research Institute, Guangzhou Grandview Crystal Screen Co., Ltd., Zhangjiagang City Star screen audio-visual works, Ma'anshan City star screen Ltd., Chengdu Pfister Technology Co., Ltd. Qinhuangdao Changlong screen, instrument Nanjing Yangtze New World Co., Ltd, Nanjing listen Kim Nam Television Equipment Co., Ltd., Harbin Film Machinery Plant, Guangdong Pearl River Film Equipment Manufacturing Co., Ltd., Tianjin City film machinery factory, the PLA fifth three hundred eleven factory, Shanghai-industry Microelectronics Technology Co., Ltd., Shanghai Quality Supervision, Inspection Technology Research Institute inspection, Zhangjiagang City Equipment Co., Ltd. Samsung screens. The main drafters of this standard. Dengrong Wu, Wang Hongwei. Transmissive projection projector table size

1 Scope

This standard specifies the type A (250mm × 250mm) and B (285mm × 285mm) transmissive projector screen projection station area Location Dimension, pin location, size, and the size of the flat region of the support rod, and a projection head two significantly different in that the mesa projection screen Area size. This standard applies to A-type (250mm × 250mm) and B (285mm × 285mm) transmissive projector. This standard is compatible with two kinds of countertops as well as their projector transparencies, projector does not apply to other special purpose, does not include such Projection radiographs with special equipment.

2 Terms and definitions

The following terms and definitions apply to this standard. 2.1 Projection sets projectionstage Place on a slide projector, or other materials for the projection of the work area. 2.2 Flat area cleararea Projection table for slides or film roll unobstructed section. 2.3 Object plane objectplane Taiwan placed on the projection surface for projecting portion slides. 2.4 Screen Area picturearea In this stage projection projected area of \u200b\u200bthe image (see Figure 1).

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