BS 4995:1973

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Recommendations for measurement of the veiling glare index of lenses and optical systems

Published By	Publication Date	Number of Pages
BSI	1973	14

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Description

This British Standard adopts veiling glare index (bright field) (VGI) as a measure of the veiling glare characteristics of an optical system. Laboratory techniques for measuring VGI are described in general terms and recommendations are made regarding the performance of the main sub-units of the equipment.

Standard methods of specifying conditions of test and of expressing the results are given, while to assist in the intercomparison of VGI figures, four standard test conditions are specified. It is also the purpose of this standard to give guide lines for the operation of VGI measuring equipment such that accurate results may be achieved.

Laboratory techniques for measuring VGI are described in general terms and recommendations are made regarding the performance of the main subunits of the equipment. Standard methods of specifying conditions of test and of expressing the results. Gives guidelines for the operation of VGI measuring equipment to facilitate the obtaining of accurate results.

Additional information

Status	Confirmed
Pages	14
Publication Date	1973-11-27
ISBN	0 580 07678 4
Standard Number	BS 4995:1973
Title	Recommendations for measurement of the veiling glare index of lenses and optical systems
Descriptors	Optical properties of materials, Refractive index, Optical instruments, Testing conditions, Optical measurement, Lenses, Glare, Detectors
Publisher	BSI
Committee	CPW/172
ICS Codes	37.020 - Optical equipment

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BS 4995:1973

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