Interference No. 103,208
Hoshino et al. v. Tanaka
The invention of the count is directed to a camera or
photographing lens capable of performing automatic focusing.
(Count 1. Hoshino Patent. Tanaka application.)
The prior art includes autofocus cameras in which the
defocus amount, i.e., the deviation of the plane on which the
image is actually formed from a predetermined focal plane, is
determined and then the focusing lens is moved by a lens
driving means such as a motor according to the determined
defocus amount. (Hoshino patent, column 1, lines 16-27.)
In such preexisting cameras, the relationship between the
lens driving amount and the defocus amount is defined by a
conversion coefficient K which is a constant. (Hoshino
patent, column 1, lines 28-36).
Both Hoshino and Tanaka propose using a corrected
coefficient which is not a constant, rather than a conversion
coefficient which is a constant. (Hoshino patent, column 1,
line 68 to column 2, line 9, and column 3, lines 8-18; Tanaka
application, pages 12-13).
According to Hoshino, this corrected coefficient is
defined by the formula K (1 + C x ÎBf) where K is the0 0 0
original conversion coefficient, C is a correction
0
- 18 -
Page: Previous 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next
Last modified: November 3, 2007