NF EN 61947-1 : 2004

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General requirements
5 Light output measurement and specification
   5.1 Light output specifications
   5.2 Light output uniformity
   5.3 Contrast ratio
   5.4 Light transmission for fixed resolution projection
       systems: liquid-crystal imaging devices (LCD)
       used with an overhead projector (OHP)
   5.5 Small area contrast ratio for alternating black
       and white pixel lines
6 Fixed resolution projector characteristics
   6.1 Displayable format (IEC resolution)
   6.2 Aspect ratio
   6.3 Viewing angle (half/gain) specification for
       devices with an integral screen
   6.4 Input signal format compatibility
   6.5 Response time
   6.6 Colour measurements
   6.7 Number of colours
   6.8 Keystone correction
7 Range of focus and image size
8 Audio characteristics
9 Light source specification
10 Maximum acoustical noise level
11 Power consumption
12 Weight
13 Dimensions
14 Sync hierarchy - Recommended practice
Annex A (normative) Figures
Annex B (normative) Pattern generator specifications
Annex C (informative) Considerations in formulating this
        standard
Annex D (normative) Complete sample specification
Annex E (informative) Conversion equations
Annex F (informative) Possible causes of photometric
        measurement errors
Annex G (informative) Photometer precision and veiling
        glare
Annex H (informative) Light measuring devices
Annex I (informative) Figure of merit for projection
        display colour gamut
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Specifies requirements for measuring and documenting key performance parameters for electronic projection systems with fixed resolution projectors in which the light source and projection/magnification optics are an integral part of the system.