CPC G01J 5/20 (2013.01) [G01J 1/0414 (2013.01); G01J 1/44 (2013.01); G01J 5/0225 (2013.01); G01J 5/40 (2013.01); G02B 26/085 (2013.01); G02B 26/0833 (2013.01); G02B 26/0866 (2013.01); G01J 2005/0077 (2013.01); G01J 2005/106 (2013.01)] | 20 Claims |
1. An apparatus comprising:
a plurality of mirrors;
a sensor having a surface to receive light rays reflected from the mirrors; and
at least one beamsplitter located between the mirrors and the sensor, wherein the beamsplitter comprises at least one partially-reflective surface configured to partially reflect light rays towards the mirrors.
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