Apparatus for varying a focal point of an optical system in a dental 3D-scanner and dental 3D-scanner
US12066686B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2019 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Aug 7, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/646
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to an apparatus for varying a focal point of an optical system in a dental 3D-scanner, comprising: a lens unit with a lens being movable between a front reversal position and a rear reversal position to vary a position of a focal point with respect to a scan object; a guide unit for guiding a movement of the lens unit between the front reversal position and the rear reversal position along a guide axis being parallel to an optical axis of the lens; and a drive unit for driving the movement of the lens unit, said drive unit including a linear motor with an anchor and a stator, said anchor being movable along a drive axis of the drive unit that is parallel to the guide axis, said stator being affixed to the guide unit. The present invention further relates to a dental 3D-scanner for scanning a three-dimensional scan object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.