Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nobuhiro Fukushima0
Hirotomo Izumi0
Date of Patent
January 30, 2007
0Patent Application Number
111162940
Date Filed
April 28, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention has an object to provide an optical apparatus of VIPA-type for achieving the reduction of the inter-channel loss deviation to realize a high accurate demultiplexing function. To this end, the optical apparatus according to the present invention comprises: a collimator lens converting an input light into a parallel light; a phase mask changing a phase of the parallel light from the collimator lens to change the intensity distribution into a shape different from the Gaussian distribution; a line focal lens condensing the light output from the phase mask onto a one-dimensional direction; and a VIPA plate multi-reflecting the light condensed by the line focal lens to emit the multi-reflected light.
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