WO2020102658A3 - Laser projection system - Google Patents

Laser projection system Download PDF

Info

Publication number
WO2020102658A3
WO2020102658A3 PCT/US2019/061684 US2019061684W WO2020102658A3 WO 2020102658 A3 WO2020102658 A3 WO 2020102658A3 US 2019061684 W US2019061684 W US 2019061684W WO 2020102658 A3 WO2020102658 A3 WO 2020102658A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical axis
projection
disposed
path
Prior art date
Application number
PCT/US2019/061684
Other languages
French (fr)
Other versions
WO2020102658A2 (en
Inventor
Victor Wong
Chuanhmao FAN
Original Assignee
Carestream Dental Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carestream Dental Llc filed Critical Carestream Dental Llc
Publication of WO2020102658A2 publication Critical patent/WO2020102658A2/en
Publication of WO2020102658A3 publication Critical patent/WO2020102658A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062—Arrangements for scanning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4542—Evaluating the mouth, e.g. the jaw
    • A61B5/4547—Evaluating teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • A61C9/006—Optical means or methods, e.g. scanning the teeth by a laser or light beam projecting one or more stripes or patterns on the teeth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/2518—Projection by scanning of the object
    • G01B11/2527—Projection by scanning of the object with phase change by in-plane movement of the patern
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/50—Depth or shape recovery
    • G06T7/521—Depth or shape recovery from laser ranging, e.g. using interferometry; from the projection of structured light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30004—Biomedical image processing
    • G06T2207/30036—Dental; Teeth

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Dentistry (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Pathology (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rheumatology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Epidemiology (AREA)
  • Theoretical Computer Science (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Endoscopes (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

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.
PCT/US2019/061684 2018-11-16 2019-11-15 Laser projection system WO2020102658A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862768358P 2018-11-16 2018-11-16
US62/768,358 2018-11-16

Publications (2)

Publication Number Publication Date
WO2020102658A2 WO2020102658A2 (en) 2020-05-22
WO2020102658A3 true WO2020102658A3 (en) 2020-07-23

Family

ID=69024586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/061684 WO2020102658A2 (en) 2018-11-16 2019-11-15 Laser projection system

Country Status (1)

Country Link
WO (1) WO2020102658A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020133627A1 (en) 2020-12-15 2022-06-15 Infinisense Technologies GmbH Method and intraoral scanner for capturing the topography of the surface of a translucent, in particular dental, object
CN112965259A (en) * 2021-03-17 2021-06-15 三序光学科技(苏州)有限公司 Multi-aperture light beam dodging module and optical device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5406342A (en) * 1992-01-15 1995-04-11 Euclid Medical Instruments System for determining the topography of a curved surface
WO2014158150A1 (en) * 2013-03-27 2014-10-02 Seikowave, Inc. Portable structured light measurement module/apparatus with pattern shifting device incorporating a fixed-pattern optic for illuminating a subject-under-test
US20180263482A1 (en) * 2017-03-16 2018-09-20 Carestream Health, Inc. Structured light generation for intraoral 3d camera using 1d mems scanning
WO2019032923A2 (en) * 2017-08-10 2019-02-14 D4D Technologies, Llc Intra-oral scanning device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9295532B2 (en) 2011-11-10 2016-03-29 Carestream Health, Inc. 3D intraoral measurements using optical multiline method
US9349182B2 (en) 2011-11-10 2016-05-24 Carestream Health, Inc. 3D intraoral measurements using optical multiline method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5406342A (en) * 1992-01-15 1995-04-11 Euclid Medical Instruments System for determining the topography of a curved surface
WO2014158150A1 (en) * 2013-03-27 2014-10-02 Seikowave, Inc. Portable structured light measurement module/apparatus with pattern shifting device incorporating a fixed-pattern optic for illuminating a subject-under-test
US20180263482A1 (en) * 2017-03-16 2018-09-20 Carestream Health, Inc. Structured light generation for intraoral 3d camera using 1d mems scanning
WO2019032923A2 (en) * 2017-08-10 2019-02-14 D4D Technologies, Llc Intra-oral scanning device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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 *

Also Published As

Publication number Publication date
WO2020102658A2 (en) 2020-05-22

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