Title:
METHODS AND APPARATUS FOR DETERMINING THREE DIMENSIONAL CONFIGURATIONS
Document Type and Number:
WIPO Patent Application WO/2005/108918
Kind Code:
A2
Abstract:
Three dimensional configurations of a portion of an object (12), such as a patient's
tooth, are determined using intensity patterns produced by a projection unit
(20) and detected by a sensor unit (22). In some embodiments, the intensity patterns
are produced using a set of slides (16A,16B,16C), e.g., a set of photographic
slides, while in others they are produced using a transmissive liquid crystal
device (60) or a single slide (16) which is moved by a piezoelectric translator
(64). Methods and apparatus for reducing the effects of ambient light are also
disclosed.
Inventors:
MAGARILL SIMON
PHILLIPS WILLIAM E III
DOLGIN MICHAEL
O'KEEFE MICHAEL W
SNIVELY DAVID M
PHILLIPS WILLIAM E III
DOLGIN MICHAEL
O'KEEFE MICHAEL W
SNIVELY DAVID M
Application Number:
PCT/US2005/009612
Publication Date:
November 17, 2005
Filing Date:
March 22, 2005
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
G01S17/89; G01B11/24; G01B11/25; G01S7/481; A61C9/00; (IPC1-7): G01B11/24
Foreign References:
| US6937348B2 | 2005-08-30 | |||
| US6341016B1 | 2002-01-22 | |||
| US20030016366A1 | 2003-01-23 |
Attorney, Agent or Firm:
JONAS, George W., et al. (Post Office Box 33427 Saint Paul, Minnesota, US)
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