Depolarizer and spectroscope
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United States of America Patent
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N/A
Issued Date -
Jan 9, 2003
app pub date -
Jun 10, 2002
filing date -
Jun 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A spectroscope having a high spectroscopic characteristic capable of eliminating a polarization dependence on an arbitrary polarization state of an incident light, and measuring a spectrum having a true central wavelength of the light. The spectroscope comprises: a depolarizer comprising: a first plate a thickness of which continuously changes in a direction of 45 degrees with a first optical axis; and a second plate a thickness of which continuously changes, and which is stuck on the first plate; wherein an angle between the first optical axis and a second optical axis of the second plate, is 45 degrees, and a first reduction direction of the thickness of the first plate and a second reduction direction of the thickness of the second plate is opposite to each other; and a spectroscopic device a dispersion direction of which intersects orthogonally with the first reduction direction.
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