WO2005074789A1 - Kurzkohärenz-interferometrische längenmessung am auge - Google Patents
Kurzkohärenz-interferometrische längenmessung am auge Download PDFInfo
- Publication number
- WO2005074789A1 WO2005074789A1 PCT/EP2005/001164 EP2005001164W WO2005074789A1 WO 2005074789 A1 WO2005074789 A1 WO 2005074789A1 EP 2005001164 W EP2005001164 W EP 2005001164W WO 2005074789 A1 WO2005074789 A1 WO 2005074789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring
- eye
- interferometer
- short
- coherence interferometer
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/102—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for optical coherence tomography [OCT]
Definitions
- the present application relates to a measuring method of diagnostic ophthalmology, in particular measuring arrangements for measuring partial lengths of the eye in connection with cataract surgery and refractive eye surgery.
- the measuring accuracy is therefore given by the coherence length lc of the measuring light beam, which in addition to the wavelength ⁇ mainly depends on its spectral Width ⁇ depends (strictly speaking, the shape of the spectrum also plays a role): lc ⁇ ⁇ 2 / ⁇ . (1)
- the two object areas distanced in depth are illuminated with a double measuring beam.
- a further measuring beam is first reflected out of the measuring beam illuminating the measuring object in front of the measuring object by means of a beam splitter and, after having gone through a detour, in which an additional refractive optics for focusing can also be arranged, is reflected back into the original measuring beam.
- This procedure reduces the interferometer mirror scan distance to a smaller value than the distance to be measured. With fast scanning, this method can also meet the interferometric stability requirements.
- the beam splitters 304 and 308 can be designed as polarizing beam splitters in order to avoid disturbing reflections and to optimize the beam intensities. Then, by rotating a linear polarizer 330, the division ratio of reference beam intensity to measuring beam intensity can be optimized such that an optimal signal-to-noise ratio is obtained at the photodetector 311. Furthermore, a ⁇ / 4 plate 331 can be arranged at 45 ° to the direction of polarization after the beam splitter 304 in the measuring beam 315.
- the reflection prism 306 is mounted on a sliding table 358. Its position can be adjusted in such a way that the coherence window is at the corneal apex of the eye 323 in the configuration of the scanner plate 335 of the interferometer shown by continuous lines in FIG. 3. If the scanner plate 335 now moves - on which the 90-degree mirror 316 and the focusing optics 319 are mounted - in the direction of the interferometer axis 340 shown in broken lines, the measuring beam path in the drawing to the left of the beam splitter 304 is shortened by 2 times S. The consequence is that the coherence window shifts the distance S from the corneal apex into the eye.
- the coherence window can now be shifted to the right by the entire optical eye length L and this distance can be delimited with the reference light using the short coherence interferences of the light reflected by the fundus 325.
- the position of the reflection prism 306, as stated above, can be with Using the shift table 358 so that the focus for a point is approximately in the middle of the anterior chamber of the eye in the middle of the coherence window. Such an adjustment is of particular interest when it comes to precise measurements of the geometry of the anterior chamber.
- the various intraocular sections can also be measured.
- the light bundle 704 reflected by the mirror 706 in the direction of the optical axis 740 is focused by the focusing optics 709 into the focus 710.
- the focus 710 is imaged by the relay optics 711 in the point 712.
- Point 712 is located on the cornea of an eye 723, the length L of which is measured.
- the focusing optics 709 are mounted on the scanner plate 725 by means of a holder 724.
- 725 can be the moving carriage of a voice coil scanner - for example from the company Physik Instrumente - or an ultrasound scanning table or another corresponding device, the base plate 726 of which is fastened on the base plate 799.
- the scanner plate 725 is periodically moved back and forth along the optical axis 740 by the distance S between the solid position 725 and the dashed position 727. If the scanner plate is in the position shown in dashed lines, then the focus of the light bundle 704 - for example in the configuration shown in FIG. 7 - is at the focal point 728 of the relay optics 711 and the light bundle 704 is a collimated light bundle 730 on the eye 723 directed. The eye focuses this bundle of light on its fundus. In the case of ametropia, a collecting or diverging auxiliary optics 739 can be placed in front of the eye 723, which compensates for the ametropia.
- the components in these boxes form functional groups which can largely be set up separately.
- the beam path as indicated in FIG. 8, is initially different from that of FIG. 7 in that the moving 90-degree mirror 749 belonging to the reference beam path and the focusing optics 709 generating the focus 710 in the measuring beam path are arranged side by side on the scanner plate. This eliminates the plate 708 and all the components on it can be mounted directly on the base plate 799, which not only simplifies the overall structure but also makes it more stable.
- FIG. 10 outlines a corresponding beam path of the interferometer measuring arm.
- the virtual focus 728 now takes the place of the real focus 728.
- the short-coherence light source 301 for example a superluminescence diode, emits a temporally partially coherent and spatially as completely coherent light beam 302 that illuminates the beam splitter 304 through an optics 303 through the beam splitter 308.
- the beam splitter 304 divides the light beam 302 into measuring beam 315 and reference beam 305.
- the reference beam 305 is optically folded by a series of mirrors and reflectors: the reference beam 305 is first of all from the 90 ° mirror 1001 after passing through the dispersion compensation prisms 307 and 307 ' directed to the retroreflector mirror 1002 and from there back to the reflector mirror 1003, which further reflects the reference beam onto the 90 ° mirror 1004.
- the optics 1013, 1002 and 1004 are mounted on a scanner plate 1335 which is movable in the direction of the interferometer axis 340 shown in broken lines.
- the scanner plate 335 can be the moving slide of a voice coil scanner - for example from the company Physik Instrumente - or an ultrasound piezo scanning table or another corresponding device.
- a further advantageous embodiment of the structure consists in providing additional means which allow the optical axis of the device to be oriented in relation to the optical axis of the eye or the visual axis, for example by a method as in PCT application WO 2002 / 065899 A2, the entire content of which is hereby incorporated by reference, or by means of correspondingly adjustable beam deflection elements (prisms, wedges) in the device itself.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05726333.7A EP1713378B1 (de) | 2004-02-06 | 2005-02-04 | Kurzkohärenz-interferometrische längenmessung am auge |
US10/586,220 US7695137B2 (en) | 2004-02-06 | 2005-02-04 | Short-coherence interferometric measurement of length on the eye |
JP2006551812A JP4746564B2 (ja) | 2004-02-06 | 2005-02-04 | 眼の部分区間長測定のためのショートコヒーレンス干渉計 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1792004 | 2004-02-06 | ||
ATA179/2004 | 2004-02-06 | ||
ATA719/2004 | 2004-04-27 | ||
AT0071904A AT501056B1 (de) | 2004-02-06 | 2004-04-27 | Kurzkohärenz-interferometrische längenmessung am auge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005074789A1 true WO2005074789A1 (de) | 2005-08-18 |
Family
ID=34839182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/001164 WO2005074789A1 (de) | 2004-02-06 | 2005-02-04 | Kurzkohärenz-interferometrische längenmessung am auge |
Country Status (5)
Country | Link |
---|---|
US (1) | US7695137B2 (de) |
EP (1) | EP1713378B1 (de) |
JP (1) | JP4746564B2 (de) |
AT (1) | AT501056B1 (de) |
WO (1) | WO2005074789A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008151821A1 (de) * | 2007-06-15 | 2008-12-18 | Carl Zeiss Meditec Ag | Vorrichtung und verfahren zur bestimmung von vorderkammertiefe und augenlänge eines auges |
EP2020205A1 (de) * | 2007-07-24 | 2009-02-04 | SIS AG, Surgical Instrument Systems | Ophthalmologische Messvorrichtung und Messverfahren |
DE102007045454A1 (de) * | 2007-09-24 | 2009-04-16 | Schott Ag | Pulsstretcher mit variablen Verzögerungsstrecken |
US8294971B2 (en) | 2008-12-18 | 2012-10-23 | Bausch • Lomb Incorporated | Apparatus comprising an optical path delay scanner |
US8727532B2 (en) | 2007-07-24 | 2014-05-20 | Sis Ag, Surgical Instrument Systems | Ophthalmological measurement apparatus and measurement method |
US9186059B2 (en) | 2007-12-21 | 2015-11-17 | Bausch & Lomb Incorporated | Ophthalmic instrument alignment apparatus and method of using same |
Families Citing this family (10)
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DE102005059923A1 (de) * | 2005-12-13 | 2007-06-14 | Oculus Optikgeräte GmbH | Verfahren und Vorrichtung zur Bestimmung des Abstandes zu einem Messpunkt auf einer Gewebefläche des Auges |
WO2010017954A2 (de) * | 2008-08-12 | 2010-02-18 | Carl Zeiss Meditec Ag | Tiefenauflösende optische kohärenzreflektrometrie |
DE102009022958A1 (de) * | 2009-05-28 | 2010-12-02 | Carl Zeiss Meditec Ag | Vorrichtung und Verfahren zur optischen Messung von Relativabständen |
US7980696B1 (en) * | 2010-01-21 | 2011-07-19 | Nidek Co., Ltd. | Ophthalmic photographing apparatus |
JP2015509433A (ja) * | 2012-03-07 | 2015-03-30 | オプトビュー,インコーポレーテッド | 光干渉断層法を用いた生体計測 |
US9849032B2 (en) | 2013-03-13 | 2017-12-26 | Optimedica Corporation | Laser eye surgery system |
CN105338932B (zh) * | 2013-03-13 | 2017-07-04 | 光学医疗公司 | 用于激光手术系统的自由浮动式患者接口 |
CA2957355A1 (en) | 2014-09-02 | 2016-03-10 | Costruzioni Strumenti Oftalmici C.S.O. S.R.L. | An optical coherence tomography system and method |
WO2016179431A1 (en) * | 2015-05-05 | 2016-11-10 | Duke University | Systems and methods for long working distance optical coherence tomography (oct) |
EP3572765A1 (de) * | 2018-05-23 | 2019-11-27 | Haag-Streit Ag | Oct-system und oct-verfahren |
Citations (4)
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WO1992019930A1 (en) * | 1991-04-29 | 1992-11-12 | Massachusetts Institute Of Technology | Method and apparatus for optical imaging and measurement |
DE19624167A1 (de) | 1995-06-23 | 1997-01-16 | Zeiss Carl Jena Gmbh | Kohärenz-Biometrie und -Tomographie mit dynamischem kohärentem Fokus |
WO2002004884A1 (de) * | 2000-07-07 | 2002-01-17 | Knuettel Alexander | Niederkohärenz-interferometrisches gerät zur tiefenabtastung eines objektes |
WO2003086180A2 (de) * | 2002-04-18 | 2003-10-23 | Haag-Streit Ag | Messung optischer eigenschaften |
Family Cites Families (12)
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DE3201801A1 (de) | 1982-01-21 | 1983-09-08 | Adolf Friedrich Prof. Dr.-Phys. 4300 Essen Fercher | Verfahren und anordnung zur messung der teilstrecken des lebenden auges |
JPH10267830A (ja) * | 1997-03-26 | 1998-10-09 | Kowa Co | 光学測定装置 |
JPH10267610A (ja) * | 1997-03-26 | 1998-10-09 | Kowa Co | 光学測定装置 |
JPH10267631A (ja) * | 1997-03-26 | 1998-10-09 | Kowa Co | 光学測定装置 |
DE19713138A1 (de) * | 1997-03-27 | 1998-10-01 | Zeiss Carl Jena Gmbh | Anordnung zur Ermittlung optisch relevanter Daten des Auges |
US6053613A (en) * | 1998-05-15 | 2000-04-25 | Carl Zeiss, Inc. | Optical coherence tomography with new interferometer |
EP1232377B1 (de) | 1999-11-24 | 2004-03-31 | Haag-Streit Ag | Verfahren und vorrichtung zur messung optischer eigenschaften wenigstens zweier voneinander distanzierter bereiche in einem transparenten und/oder diffusiven gegenstand |
JP2001174404A (ja) * | 1999-12-15 | 2001-06-29 | Takahisa Mitsui | 光断層像計測装置および計測方法 |
JP4517211B2 (ja) * | 2000-05-12 | 2010-08-04 | 株式会社トプコン | 眼特性測定装置 |
DE10042751A1 (de) * | 2000-08-31 | 2002-03-14 | Thomas Hellmuth | System zur berührungslosen Vermessung der optischen Abbildungsqualität eines Auges |
JP4624605B2 (ja) * | 2001-08-03 | 2011-02-02 | オリンパス株式会社 | 光イメージング装置 |
DE10142001A1 (de) * | 2001-08-28 | 2003-03-20 | Zeiss Carl Jena Gmbh | Optische Multiplex Kurzkohärenz-Interferometrie am Auge |
-
2004
- 2004-04-27 AT AT0071904A patent/AT501056B1/de not_active IP Right Cessation
-
2005
- 2005-02-04 JP JP2006551812A patent/JP4746564B2/ja not_active Expired - Fee Related
- 2005-02-04 US US10/586,220 patent/US7695137B2/en not_active Expired - Fee Related
- 2005-02-04 WO PCT/EP2005/001164 patent/WO2005074789A1/de not_active Application Discontinuation
- 2005-02-04 EP EP05726333.7A patent/EP1713378B1/de not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1992019930A1 (en) * | 1991-04-29 | 1992-11-12 | Massachusetts Institute Of Technology | Method and apparatus for optical imaging and measurement |
DE19624167A1 (de) | 1995-06-23 | 1997-01-16 | Zeiss Carl Jena Gmbh | Kohärenz-Biometrie und -Tomographie mit dynamischem kohärentem Fokus |
WO2002004884A1 (de) * | 2000-07-07 | 2002-01-17 | Knuettel Alexander | Niederkohärenz-interferometrisches gerät zur tiefenabtastung eines objektes |
WO2003086180A2 (de) * | 2002-04-18 | 2003-10-23 | Haag-Streit Ag | Messung optischer eigenschaften |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008151821A1 (de) * | 2007-06-15 | 2008-12-18 | Carl Zeiss Meditec Ag | Vorrichtung und verfahren zur bestimmung von vorderkammertiefe und augenlänge eines auges |
EP2020205A1 (de) * | 2007-07-24 | 2009-02-04 | SIS AG, Surgical Instrument Systems | Ophthalmologische Messvorrichtung und Messverfahren |
EP2359743A1 (de) * | 2007-07-24 | 2011-08-24 | SIS AG, Surgical Instrument Systems | Ophthalmologische Messvorrichtung und Messverfahren |
US8727532B2 (en) | 2007-07-24 | 2014-05-20 | Sis Ag, Surgical Instrument Systems | Ophthalmological measurement apparatus and measurement method |
DE102007045454A1 (de) * | 2007-09-24 | 2009-04-16 | Schott Ag | Pulsstretcher mit variablen Verzögerungsstrecken |
US7822093B2 (en) | 2007-09-24 | 2010-10-26 | Hellma Materials Gmbh & Co. Kg | Method and apparatus for changing the length of a laser pulse |
DE102007045454B4 (de) * | 2007-09-24 | 2013-04-25 | Hellma Materials Gmbh & Co. Kg | Pulsstretcher mit variablen Verzögerungsstrecken |
US9186059B2 (en) | 2007-12-21 | 2015-11-17 | Bausch & Lomb Incorporated | Ophthalmic instrument alignment apparatus and method of using same |
US8294971B2 (en) | 2008-12-18 | 2012-10-23 | Bausch • Lomb Incorporated | Apparatus comprising an optical path delay scanner |
Also Published As
Publication number | Publication date |
---|---|
US20080218691A1 (en) | 2008-09-11 |
AT501056B1 (de) | 2007-04-15 |
EP1713378B1 (de) | 2013-05-08 |
JP2007520291A (ja) | 2007-07-26 |
AT501056A1 (de) | 2006-06-15 |
EP1713378A1 (de) | 2006-10-25 |
US7695137B2 (en) | 2010-04-13 |
JP4746564B2 (ja) | 2011-08-10 |
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