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. Author manuscript; available in PMC: 2009 May 1.
Published in final edited form as: J Biomed Opt. 2008;13(3):034027. doi: 10.1117/1.2940360

Figure 17.

Figure 17

The influence of the carrier lens thickness, entrance pupil format factor, and eye’s pupil diameter on the light loss due to exit pupil coupling in a Keplerian telescope of magnification 2.8×. For the 5mm lens thickness expanding the entrance pupil horizontally to 10 mm substantially improves light efficiency for all pupil diameters. Further expansion results in modest effect and only for large eye pupils. For the 8mm lens doubling the horizontal dimension is beneficial for all sub optimal pupil sizes but further increase of horizontal dimension is of little value (not shown)