| 摘要 |
The present invention relates to an interferometer, comprising at least a beamsplitter ( 10 ), at least one end reflector ( 11 ) for returning beams (S 2, S 3 ), and a set of reflectors ( 14, 15 ) for reflecting the beams (S 2, S 3 ) between the beamsplitter ( 10 ) and the end reflector ( 11 ) or the end reflectors, at least some of said set of reflectors ( 14, 15 ) being adapted to be rotatable around an axis (omega). Said set of reflectors comprises two angle reflectors ( 14, 15 ), constituted by plane reflectors, and the said end reflector ( 11 ) is or the end reflectors are an angle reflector constituted by plane reflectors ( 11', 11 ''). An angle line of the end reflector ( 11 ) is or the angle lines of end reflectors are arranged perpendicular to an angle line of both of the angle reflectors ( 14, 15 ).
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