Appeal No. 97-1703
Application 08/382,432
To machine one or more nonaxisymmetric sector
surfaces, such as shown at 16 in FIGS. 1 and 2 or the
entire surface as shown at 17 in FIG. 3, in a workpiece
being rotated about a central axis of rotation, the
auxiliary slide 28 is displaced at a relatively rapid
rate toward or away from the surface of the workpiece
in accordance with a predetermined program so as to
provide the off-axis sector [column 3, line 47 through
column 4, line 1].
Korsch discloses a “three-mirror optical system having a
real, accessible entrance (or exit) pupil making it particularly
suitable for use as a collimator but which may also be used as a
telescope and where the primary and tertiary mirrors are off-
centered from the optical axis” (column 1, lines 7 through 12).
The Korsch specification indicates that the primary and tertiary
mirrors are differently contoured and that the specific
parameters of the system are of paramount importance in achieving
the foregoing objective.
As conceded by the examiner (see page 3 in the answer), the
Douglass reference does not meet the limitations in independent
claims 9 and 11 relating to the fabrication on a unitary
substrate of differently contoured primary and tertiary mirrors
of a three-mirror optical system. Although the Korsch reference
discloses a three-mirror optical system having differently
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Last modified: November 3, 2007