Appeal No. 96-1368
Application 08/080,891
Instead, the birefringent polymer material in Figure 8 is
layer 74, which is located between elements 72a and 72b,8
which are formed of glass or other isotropic material (col.
30, lines 18-25). This is consistent with Rogers's statement
that "[t]he polymeric materials utilized in the devices of the
present invention can be variously formed or shaped into
films, sheets, coatings, layers, fibrils, fibers or the like"
(col. 21, lines 3-6). As a result, Rogers's suggestion of9
using polymeric birefringent material in a Wollaston prism
(col. 30, lines 39-60) appears to be a suggestion to use a
layer of such material between isotropic wedge-shaped
elements. Rogers also fails to disclose that the birefringent
Element 72b is incorrectly labeled 72 in the figure.8
The birefringent polymer material used in the other9
disclosed embodiments is likewise in the form of a layer or
film. Specifically, in the light polarizing sheet shown in
Figure 5, the birefringent material is in the form of a
lenticular layer 16 between isotropic layers 14 and 18 (col.
25, lines 7-11 and 38-44). In the headlamp of Figure 6, a
prismatic birefringent polymer layer 42 abuts a prismatic
isotropic layer 44 (col. 28, lines 1-6). Figure 7 shows a
multilayer polarizing sheet 50 having alternating layers of
birefringent polymer material 54 and isotropic material 56
(col. 28, lines 35-38).
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