Title:
LASER PROJECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/102658
Kind Code:
A3
Abstract:
A projection apparatus for an intraoral scanner has a laser diode energizable to generate a beam of laser light along an optical axis. A collimator lens is disposed along the optical axis in the path of the generated light beam. A uniform light generator is disposed along the optical axis to improve the uniformity of the generated light beam of the collimator lens. A spatial light modulator disposed in the path of the beam from the uniform light generator is energizable to impart a pattern to the beam. A projection optic projects the patterned light toward a focal plane. A spatial filter is disposed to block one or more diffraction orders of the patterned light at the Fourier plane of the projection optic to form a filtered projection beam.
Inventors:
WONG VICTOR (US)
FAN CHUANHMAO (US)
FAN CHUANHMAO (US)
Application Number:
PCT/US2019/061684
Publication Date:
July 23, 2020
Filing Date:
November 15, 2019
Export Citation:
Assignee:
CARESTREAM DENTAL LLC (US)
International Classes:
G02B3/00; A61B5/00; A61C9/00; G01B11/25; G02B5/00; G02B27/09; G06T7/521
Domestic Patent References:
| WO2014158150A1 | 2014-10-02 | |||
| WO2019032923A2 | 2019-02-14 |
Foreign References:
| US20180263482A1 | 2018-09-20 | |||
| US5406342A | 1995-04-11 |
Other References:
KAWARA T: "Corneal topography using Moiré contour fringes", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, DC, US, vol. 18, no. 21, 1 November 1979 (1979-11-01), pages 3675 - 3678, XP002145953, ISSN: 0003-6935, DOI: 10.1364/AO.18.003675
Attorney, Agent or Firm:
COURSEY, R., Stevan (US)
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