CPC G02B 27/283 (2013.01) [G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); G02B 27/425 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01)] | 20 Claims |
1. An eye-tracking optical assembly comprising:
a light source for illuminating an eye;
a first diffraction type polarizing beam splitter (DT-PBS); and
a second DT-PBS, wherein the first DT-PBS is configured to direct, based on polarization, a first portion of light from the second DT-PBS towards an eye-tracking detector,
wherein one of the first DT-PBS and the second DT-PBS is configured to compensate for a spectral dispersion of one other of the first DT-PBS and the second DT-PBS.
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