Checking the interocular cross-talk on the Virtalis system

Measurements taken by Claire Brash and Gloria Young, 13th August 2010.

All measurements are in candela/metre-squared with a Minolta LS-100 photometer.

3D glasses

These values were taken using the 3D glasses worn in the experiments. The values in successive rows show results taken through two different lenses, thus include variation in the individual lenses as well as repeated-measures variability.

	Left Lens	Right Lens
Left BLACK Right BLACK	0.207	0.184
Left BLACK Right BLACK	0.229	0.147
Left WHITE Right WHITE	19.30	13.44
Left WHITE Right WHITE	19.91	15.41
Left BLACK Right WHITE	0.396	15.08
Left BLACK Right WHITE	0.408	15.25
Left WHITE Right BLACK	0.476	13.67
Left WHITE Right BLACK	0.448	18.96

	Left Lens	Right Lens
Left OFF Right WHITE	0.263	16.48
Left OFF Right WHITE	0.238	13.61
Left WHITE Right OFF	19.61	0.367
Left WHITE Right OFF	19.71	0.225

This suggests that cross-talk from right to left is (0.263+0.238)/(16.48+13.61) = 1.7%, while cross-talk from left to right is (0.225+0.367)/(19.61+19.71) = 1.5%.

This is slightly higher than the value measured previously when WHITE was a higher luminance value (due to different settings on the projector). However, this may just reflect the photometer’s inability to measure low luminances accurately.