Appeal 2006-2416
Application 09/988,660
Independent claim 4 is reproduced below:
4. An infrared imaging apparatus comprising:
a dewar, having an internal volume that defines a cold space;
an IR transmissive window that seals the cold space to receive IR
energy directly from an IR source;
a first lens located within the cold space to receive IR energy directly
from the IR transmissive window;
an IR detector located within the cold space in operational
communication with the first lens and positioned coincident to a focal plane
of at least a first and second wavelength of IR energy; and
an optical stop located within the cold space in front of the first lens,
wherein the first lens has a first aspheric profile on a first side and a
second aspheric profile on a second side, the first side parallel to the second
side and the second side facing the detector,
wherein the second aspheric profile has a holographic optical element,
and
wherein the holographic optical element color corrects a first color
band of infrared energy having wavelengths of 3 to 5 micrometer and
coincidently focuses at the common focal plane the first color band and a
second color band of infrared energy having wavelengths of 8 to 12
micrometer.
The following references are relied on by the Examiner:
Howard US 4,507,551 Mar. 26, 1985
Amos US 5,369,511 Nov. 29, 1994
Tennant US 6,034,407 Mar. 7, 2000
Ben-Menachem US 2001/0029816 A1 Oct. 18, 2001
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