Appeal No. 2004-0288
Application No. 09/173,747
recording medium, such a magneto-optical disc. As depicted in
Figure 6, the Magneto-optical head includes an objective lens
assembly (41 and 42) which converges the incident light toward a
center opening in a magnetic field generating coil
(specification, pages 28-30). An understanding of the invention
can be derived from a reading of exemplary independent claim 37,
which is reproduced as follows:
37. An optical device comprising:
light converging means, said light converging means
converging light onto a photomagnetic recording layer of an
optical recording medium;
magnetic field generating means between said light
converging means and said optical recording medium,
said magnetic field generating means having a light
transmitting center hole, said light transmitting center
hole having a center hole diameter,
said light incident upon said magnetic field generating
means having a beam diameter greater than said center hole
diameter,
said light passing through said light transmitting
center hole having a beam diameter equal to said center hole
diameter.
The Examiner relies on the following references:
U.S. Patents
Lee et al. (Lee) 5,105,408 Apr. 14, 1992
Miyagawa et al. (Miyagawa) 5,235,581 Aug. 10, 1993
Hasegawa et al. (Hasegawa) 5,293,360 Mar. 8, 1994
Kodama et al. (Kodama) 5,470,491 Nov. 28, 1995
Arimoto et al. (Arimoto) 5,576,098 Nov. 19, 1996
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