Sizing an installation MIROS design

“Spill”, is the term used to describe the proportion of the luminousflux produced by the projector that fails to hit the reflector. This quantity must be optimised depending on the emphasis of the lighting concept. Efforts must be made to achieve a minimum level for maximum system efficiency in terms of illuminating the working plane, whereas a useful spill component must be defined for formal, creative aspects (ceiling appearance or indirect light in the room).

Distance between projector and mirror

Note: The diagrams below can be used to look up the percentage of excessive irradiation of the reflector produced by the light conefrom the projector. This is shown below for three different reflector sizes (Ø 500/600/800 mm) for mirrors that are inclined at two anglesrelative to the projector (0°and 40°). Starting from a selected distance between the projector and the reflector and the correspondingreflector characteristic in the diagram, users can read off the relevant excessive irradiation component on the vertical axis in the follo-wing diagrams. OSRAM HALOSTAR QT 24 V 150 W (halogen lamp) Projector efficiency: 51 %, 3,200 lm Advantages: best possible colour rendition properties,straightforward dimming, narrow-beam projector cha-racteristic due to compact axial filament. Restrictions: lower luminous efficiency, (21 lm/W com-pared with 85–93 lm/W using HIT lamps), shorter ser- vice life (2,000 h)1/10 angle of diffusion of projector 2 x 7° BLV HIT 150 W G12 axial Projector efficiency: 47 %, 13,000 lm (lamp with quartz dis-charge tube) Advantages: long service life, high luminous efficiency,narrower beam characteristic compared with lamps with ceramic discharge tube, highly constant luminousflux after start-up phase, good colour rendition. Restrictions: only available from BLV, possible colourscattering and colour drift, significant earlis drop inluminous flux due to NaSc technology, 1/10 angle ofdiffusion of projector 2 x 5.5° OSRAM HQI-T 150/PRO W (lamp with quartzdischarge tube) Projector efficiency: 48 %, 12,500 lm Advantages: long service life (9,000 h) Restrictions: possible colour scattering and colourdrift, 1/10 angle of diffusion of projector 2 x 5° GE CMH 150/T W (lamp with ceramic discharge tube) Projector efficiency: 48 %, 14,000 lm Advantages: extremely long service life (10-15,000 h),extremely low colour scattering, excellent colour stabi-lity, extremely high luminous efficiency Restrictions: more wide-angle projector characteristiccompared with lamps with quartz discharge tube, 1/10 angle of diffusion of projector 2 x 7°