Optics: measuring and testing – By light interference – Having polarization
Reexamination Certificate
2008-05-20
2008-05-20
Turner, Samuel A (Department: 2877)
Optics: measuring and testing
By light interference
Having polarization
Reexamination Certificate
active
11335565
ABSTRACT:
Interference measuring apparatus having an optical system for dividing a coherent light beam into two light beams, and causing the divided two light beams to pass along discrete optical paths. The light beams are made into linearly polarized light beams orthogonal to each other and given modulation to the phase of the wave front of at least one of them. The wave fronts of the linearly polarized light beams are superposed one upon the others. A light dividing member divides the light beams superposed one upon the other by the optical system into a plurality of light beams. A polarizing plate takes out each light beam with a 45° polarized component, and a plurality of light receiving elements individually receive the light beams taken out by the polarizing plate.
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Horyu Sakae
Ishizuka Ko
Kadoshima Takayuki
Kadowaki Hidejiro
Kaneda Yasushi
Fitzpatrick ,Cella, Harper & Scinto
Turner Samuel A
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