Title:
LASER ENCODER FOR SMALL METALLIC PATCHES AND METHOD OF OPERATING THE SAME
Document Type and Number:
WIPO Patent Application WO/2015/145267
Kind Code:
A3
Abstract:
An encoder and a method of operating an encoder is provided. The disclosed encoder includes a focus lens having one or more position sensors that enable the focus lens to maintain a focusing position, even when the focus lens is not focused on a writing media. The one or more position sensors enable the encoder to continue its encoding process without having to process a full focus acquisition each time the focus lens returns to the writing media.
Inventors:
HADDOCK RICHARD M (US)
Application Number:
PCT/IB2015/001174
Publication Date:
January 21, 2016
Filing Date:
February 26, 2015
Export Citation:
Assignee:
ASSA ABLOY AB (SE)
International Classes:
G06K1/12; B42D25/00; G11B7/00
Domestic Patent References:
| WO1990011599A1 | 1990-10-04 | |||
| WO1990011598A1 | 1990-10-04 |
Foreign References:
| US4922351A | 1990-05-01 | |||
| US7140540B2 | 2006-11-28 | |||
| US20070109928A1 | 2007-05-17 |
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