TheatreWorld ::: March - May 2021 | Page 41

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The Facts of Light

FACT 05 : BRIGHTNESS DEGRADATION
As brightness drops off , the colour gamut shifts , requiring correction and recalibration to maintain the DCI-P3 colour . The trade-off to make these colour corrections is a less efficient projector , further driving down brightness and accelerating the issue . The result is a dark , dim and inaccurate visual presentation that is only correctable by changing the expired Xenon bulb or laser module with a new one .
Spectrum Comparison : Xenon Light and Day Light
What makes Xenon so well-suited for cinema ? The native light spectrum of a Xenon lamp closely replicates the day light spectrum . Because of this , it can accurately reproduce the natural colours audiences are used to seeing for a realistic and true-to-life experience .
Christie Xenolite short arc Xenon lamps
Engineered for superior performance in all cinema applications
Spectral Response Curves
This series of graphs shows each illumination platform ' s efficiency in producing the DCI specified white balance . The easier a projector can achieve DCI white without filtering , the more optically efficient the system is .
Xenon produces a balanced spectrum of color requiring minimal filtering to achieve DCI white .
FACT 06 : RGB PURE LASER OUTPERFORMS LASER PHOSPHOR ILLUMINATION
Although RGB pure laser and laser phosphor are both classified as laser illuminated projectors , RGB pure laser offers precision that was previously unobtainable . The colour gamut , brightness , contrast and operational life of pure laser have lifted the industry into a new era of visuals and reliability . This is in large part a result of system design .
RGB pure laser features individual red , green and blue laser diodes with specific wavelengths allowing these projectors to be incredibly efficient .
A laser phosphor projector only uses blue laser diodes and requires extensive filtering and colour correction to achieve acceptable colour created with a rotating
March-May 2021 TW-41