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BS EN 61341:2011

BS EN 61341:2011

$102.76

Method of measurement of centre beam intensity and beam angle(s) of reflector lamps

Published By Publication Date Number of Pages
BSI 2011 16
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This Technical Report describes the method of measuring and specifying the centre beam intensity and the associated beam angle(s) of reflector lamps.

It applies to incandescent, tungsten halogen and gas-discharge and LED based reflector lamps for general lighting purposes. It does not apply to lamps for special purposes such as projection lamps.

These recommendations relate to design testing of lamps only.

PDF Catalog

PDF Pages PDF Title
5 English
CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Terms and definitions
Figure 1 – Relation between optical beam axis, geometrical-mechanical axis, peak intensity and centre beam intensity
10 3 Basic beam patterns
4 General conditions for measurement
5 Test arrangement
11 6 Measuring procedure
12 7 Specification of centre beam intensity and beam angle(s)
Figure 2 – Measurement of luminous intensity distribution
Figure 3 – Case where the centre beam intensity is smaller than 50 % of the peak intensity
13 Bibliography

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BS EN 61341:2011
$102.76