Appeal No. 98-0904
Application No. 08/500,033
the teachings of Kahl and O'Neill. Kahl and O'Neill, however,
are directed to completely disparate types of devices. That
is, although Kahl teaches the use of an infrared detector
having a refraction means that includes a Fresnel lens, Kahl's
infrared detector is of the wide- angle passive type that is
used to automatically turn the lights of a room on when it is
occupied and off when it is not. To this end, Kahl utilizes
the passive type detector to sense a change "in the heat
received within its field of view" (column 2, lines 24 and 25;
emphasis added) and, in response to the change in heat,
produces a signal which causes the lights in the room to be
turned on and off. O'Neill, while teaching a Fresnel lens
having
prisms thereon, is in no way concerned with infrared
detection. Instead, O'Neill utilizes the Fresnel lens to
concentrate sunlight on a collector or "absorber" 24 for the
purpose of converting light energy to heat. Absent the
appellant's own disclosure, we are at a complete loss to
understand why one having ordinary skill in this art would
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