Observations & Comparisons

The decision was made to observe the viewing angles in a logical manner for each of the three screens. The Milori Sensor was placed on a tripod mount which was placed in the same location and angle from screen to screen. We carefully marked the position and measured the distances and angles to ensure that the Sensor was measuring the same reflections between screens. Calibration Images were then displayed using the Sencore Video Generator.

The projector was set at a distance of 15.4 feet from the center of each screen. Markers were positioned in increments of 15 degrees starting from the center point. The Nikon 5400 camera was mounted on a tripod and moved to each 15 degree marker as each photo of both the SMPTE color bars and grayscale were taken. All of the photos for each screen were taken and loaded into the computer before shooting the next screen. This assured us that there would be no mix-up with the photos.

Carada

Da-Lite

Stewart

Here are a few observations that should be noted. In viewing the red bar of the three screens, it is rather obvious that the Stewart screen is quite a bit darker (not that this is a bad thing). This is mostly noticeable when viewing the 0 degree on-axis image. While the color looks reasonably balanced between all three screens, we did notice that the blue bar on the Stewart had some color shift towards red - primarily in the 45 degree shot.

Carada

Da-Lite

Stewart

When viewing grayscale on all three screens it was apparent that we were meeting the limitations of the low contrast ratio of the projector. There were minimal differences noted in these observations, with the exception of the increased brightness reproduction of the Da-Lite screen and the Stewart Firehawk which displayed a slightly darker image overall.