| 摘要 |
1,145,487. Interferometers. OPTOMECHANISMS Inc. April 6, 1966 [Aug. 30, 1965], No. 15269/66. Heading G2J. A combined single-beam and double-beam interferometer comprises a laser 2, a first beam splitter 4 for dividing the main laser beam into two beams 5, 6, and a second beam splitter 7 positioned to intercept both beams 5, 6, the transmitted and reflected portions 5<SP>1</SP>, 8 of the beam 5 being directed respectively towards a movable corner reflector 12 and a fixed corner reflector 9 and subsequently reunited by the beam splitter 7 and directed towards an eye-piece 15, while the transmitted and reflected portions 17, 16 of the beam 6 are directed respectively towards the corner reflectors 12, 9 and reflected back along the same paths by fixed mirrors 21, 16 to be recombined by the beam splitter 7 and directed towards an eye-piece 22.
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