AVS Forum Special Member
Join Date: May 2008
Location: San Francisco - East Bay area
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 188 Post(s)
Yes, the projector must be placed in 3D mode SOMEHOW, SOME WAY. A Blu-ray player with 2D-3D conversion should work. If your projector has a 3D-from-2D mode, that should work also. There are a fair number of projectors and panels that do not have any means of putting them in 3D mode if the signal is not 3D. If your projector is one of those, you will have to use a workaround like one of the ones you described. If your Blu-ray player lets you specify the 3D output mode, frame packed is the one you want to use.
Once you are in 3D mode, a pair of active shutter glasses have to be turned on and placed in front of the meter's lens while you are making measurements.
There is an alternative to that... IF you have calibration software that supports profiling. You can do a profiling measurement with the 3D glasses in front of the meter -- that becomes your target or reference response. You would also measure the same pattern with the 3D glasses removed from in front of the meter so the meter is reading the screen directly. The software will then create a correction matrix so that measurements made without the 3D glasses are "corrected" in software so that the readings are very close to what you would read if the 3D glasses were in the measuring path. That helps quite a lot when you are measuring the dark end of the luminance range. If your software does not support characterization, than you must have the 3D glasses in front of the meter AND TURNED ON for all 3D measurements. The glasses will cut light available for measurement by more than 50%. I've seen cases where the actual light loss is as high as 80%. That can make it difficult to calibrate the darker end of the luminance range through the 3D glasses, which is a powerful argument for using software that supports meter profiling or characterization or whatever they might call it.
"Movies is magic..." Van Dyke Parks
THX -- ISF -- HAA