Position detection apparatus having a plurality of detection...

Details Position detection apparatus having a plurality of detection... Position detection apparatus having a plurality of detection...

2006-07-04

2006-07-04

Adams, Russell (Department: 2851)

Photocopying

Projection printing and copying cameras

Step and repeat

C355S055000, C324S765010, C250S491100, C356S400000

Reexamination Certificate

active

07072023

ABSTRACT:
A surface position detection apparatus of this invention includes a position detection section having a plurality of electrodes opposing the object surface to be measured, and a measurement device for selecting at least one electrode of the plurality of electrodes in accordance with the shape of the object surface, supplying an AC current to the selected electrode, and measuring the current flowing to the electrode, thereby measuring the distance between the electrode and object surface.

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