Appeal No. 2001-1956
Application 08/923,424
wherein the first birefringent optical member includes;
a first wedge-shaped prism made of an isotropic optical
material, and
a second wedge-shaped prism positioned between the
condenser lens and the wedge-shaped prism and made of a
birefringent optical material having a center thickness of
between about 0.4 and 0.6 mm, and
wherein the second birefringent optical member includes a
third wedge-shaped prism made of a birefringent optical material
having a center thickness of between about 0.4 and 0.6 mm, and a
fourth wedge-shaped prism positioned between the third wedge-
shaped prism and the polarization interference means and made of
an isotropic optical material.
The examiner relies on the following references:
DeVeer 3,868,168 Feb. 25, 1975
Hayashi 4,964,707 Oct. 23, 1990
Bass et al. (Bass), "Handbook of Optics", Second Edition, Vol. 2,
pages 17.32-17.37 (1995)
Appellants' admitted prior art at pages 2-6 and shown in Figures
6-8.
Claims 1, 2, 5, 6, 14, 15, 27 and 28 stand rejected under
35 U.S.C. § 103 as being unpatentable over the admitted prior art
in view of DeVeer.
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