Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jyh-Haur Huang1
Ming-Fa Wang1
Chih-Kuang Chen1
Jing-Huan Liao1
Date of Patent
April 8, 2008
1Patent Application Number
114013871
Date Filed
April 11, 2006
1Patent Primary Examiner
Patent abstract
A prism unit includes a first prism having a first incident face and a first refraction face that is adjacent to and that cooperates with the first incident face to define a first angle ranging 50° to 70°, a second prism having a second incident face that is generally parallel to the first refraction face and a medium layer sandwiched between the first refraction face and the second incident face, and having a refractive index smaller than that of the first and second prisms.
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