Apparatus and method for measuring polarization direction of...

Details Apparatus and method for measuring polarization direction of... Apparatus and method for measuring polarization direction of...

2007-06-29

2010-11-09

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

By polarized light examination

C356S370000, C250S225000, C250S341300

Reexamination Certificate

active

07830511

ABSTRACT:
A polarization direction measuring apparatus includes: a first polarizing plate having an unknown polarization direction about a reference axis; a sample whose polarization direction is to be measured; a rotatable sample holder on which the sample is mounted in a first direction and a second direction opposite to the first direction, wherein the sample holder rotates the sample along a reference axis in the azimuth direction; a light source that generates light passing though the first polarizing plate and the sample; and a light detector detecting light generated by the light source that passes though the first polarizing plate and the sample.

REFERENCES:
patent: 4699514 (1987-10-01), Schmidt et al.
patent: 5627645 (1997-05-01), Imagawa et al.
patent: 2005-227019 (2005-08-01), None
patent: 2005-275063 (2005-10-01), None

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