Hmmm, so the DTP92 can't be used? What about the DTP94? Is there anybody here using it for projector calibration? Could someone make a test?
It's hard to say. The DTP92 is intended to be a colorimeter, and if it were perfect, it wouldn't matter what the spectrum was, and in fact it would do a better job than a typical 31 band spectrometer when faced with a spiky spectrum. In practice it's filter curves will not be exactly the CIE 2 degree observer, and hence it can be optimized for maximum accuracy a particular spectrum.
The DTP was close to th screen (about 50cm), with an angle of 30° (to avoid its own shadow).
Right, so it sounds like it should have given a half reasonable result.
Well, we could try such optical adapter...
Better posting the calibration and profile data first. Graeme Gill.