Interference No. 104,649
Page No. 16
F29. Sibbald Figure 3 depicts an embodiment of Sibbald's invention and is depicted below:
34
38a
36 20
20
A ýk A
40 40
42 t6
(ZX 2012, col. 3, lines 1-2). According to Sibbald, Figure 3 contains similar components as that
of Figure 2. (ZX 2012, col. 3, lines 65-67). As with Figure 2, Figure 3 comprises a light source
16 and a collimating lens arranged to produce a collimated light beam 20. (ZX 2012, col. 3, lines
37-39). Figure 3, however, introduces the collimated light 20 into a light transmitting member
by way of a prism strip 44. (ZX 2012, col. 5, lines 1-5). As discussed with respect to Figure 2,
when the light 20 strikes the surface 28 where there is a recess 32 of the fingerprint, the light is
totally internally reflected, as shown by light ray 36. In contrast, when light 20 strikes surface 28
where there is contact with a fingerprint ridge 34, the light will be largely absorbed, scattered and
diffusively reflected, as shown by light ray 36a. (ZX 2012, col. TI-ine 6ý io col. 4, linFriýTm7AIso,
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Last modified: November 3, 2007