CPC G02B 27/14 (2013.01) [G02B 1/02 (2013.01); G03F 7/70025 (2013.01); G03F 7/70566 (2013.01); G03F 7/70958 (2013.01)] | 20 Claims |
1. An optical system, comprising:
a beam splitter comprising a light entry surface having a surface normal, wherein:
the beam splitter is arranged in the optical system so that, during use of the optical system, angles of incidence with respect to the surface normal lie in a range of 45°±5°; and
the beam splitter is produced in the [110] crystal cut.
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