ES474854A1 - Fototopometro - Google Patents

Fototopometro

Info

Publication number
ES474854A1
ES474854A1 ES474854A ES474854A ES474854A1 ES 474854 A1 ES474854 A1 ES 474854A1 ES 474854 A ES474854 A ES 474854A ES 474854 A ES474854 A ES 474854A ES 474854 A1 ES474854 A1 ES 474854A1
Authority
ES
Spain
Prior art keywords
cornea
measuring
photographing system
targets
measuring target
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES474854A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optische Werke G Rodenstock
Original Assignee
Optische Werke G Rodenstock
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 Optische Werke G Rodenstock filed Critical Optische Werke G Rodenstock
Publication of ES474854A1 publication Critical patent/ES474854A1/es
Expired legal-status Critical Current

Links

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
    • A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea
    • 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
    • G01B11/255—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring radius of curvature

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

Fototopómetro para hallar la curvatura de la córnea de un ojo, con el que se fotografían marcas de medición que se reflejan en la córnea calculándose a base del resultado -la foto- de las marcas de medición y teniendo en cuenta las circunstancias geométricas, el radio de curvatura de la córnea en el sector del reflejo de las marcas de medición, caracterizado porque un número de parejas de marcas de medición está dispuesto en un soporte de marcas que se encuentra durante la medición a determinada distancia de la córnea, en el fototopómetro, estando dimensionada la distancia de las marcas de cada pareja en relación con su distancia al eje óptico del sistema fotográfico y a la córnea de tal manera que teniendo en cuenta la escala de reproducción del sistema fotográfico, las distancias de todas las parejas de marcas de medición reflejadas guardan la misma proporción en cada radio de córnea asignado.
ES474854A 1978-02-07 1978-11-06 Fototopometro Expired ES474854A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2805084A DE2805084C3 (de) 1978-02-07 1978-02-07 Fototopometer

Publications (1)

Publication Number Publication Date
ES474854A1 true ES474854A1 (es) 1979-03-16

Family

ID=6031326

Family Applications (1)

Application Number Title Priority Date Filing Date
ES474854A Expired ES474854A1 (es) 1978-02-07 1978-11-06 Fototopometro

Country Status (6)

Country Link
US (1) US4312574A (es)
JP (1) JPS54108493A (es)
DE (1) DE2805084C3 (es)
ES (1) ES474854A1 (es)
FR (1) FR2416000A1 (es)
IT (1) IT1114400B (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572628A (en) * 1981-05-29 1986-02-25 Nippon Kogaku K.K. Method of and apparatus for measuring radius
US4660946A (en) * 1981-09-21 1987-04-28 Canon Kabushiki Kaisha Cornea shape measuring method and apparatus
US4618230A (en) * 1982-06-24 1986-10-21 Vancouver General Hospital Visual stimulator
US4710003A (en) * 1982-10-21 1987-12-01 Canon Kabushiki Kaisha Cornea shape measuring apparatus
US4929076A (en) * 1983-06-13 1990-05-29 Canon Kabushiki Kaisha Ophthalmic measuring apparatus
US4878750A (en) * 1985-01-25 1989-11-07 Canon Kabushiki Kaisha Ophthalmic measuring apparatus
US4902123A (en) * 1987-11-25 1990-02-20 Taunton Technologies, Inc. Topography measuring apparatus
US4998819A (en) * 1987-11-25 1991-03-12 Taunton Technologies, Inc. Topography measuring apparatus
US5106183A (en) * 1987-11-25 1992-04-21 Taunton Technologies, Inc. Topography measuring apparatus
US5262806A (en) * 1988-07-29 1993-11-16 Research Development Foundation Photo-deviometer
US5283598A (en) * 1989-12-22 1994-02-01 Phoenix Laser Systems, Inc. Illumination of the cornea for profilometry
US5054907A (en) * 1989-12-22 1991-10-08 Phoenix Laser Systems, Inc. Ophthalmic diagnostic apparatus and method
US5170193A (en) * 1989-12-22 1992-12-08 Phoenix Laser Systems, Inc. Apparatus and method of identifying signals in biological tissues
JP3042851B2 (ja) * 1990-01-29 2000-05-22 株式会社ニデック 角膜形状測定装置
US5585873A (en) * 1991-10-11 1996-12-17 Alcon Laboratories, Inc. Automated hand-held keratometer
EP0643941B1 (en) * 1993-09-22 1998-08-05 Konan Inc. Apparatus for obtaining images of cornea cells
AU2008251316B2 (en) 2007-05-11 2014-05-29 Amo Development, Llc Combined wavefront and topography systems and methods
US7976163B2 (en) 2007-06-27 2011-07-12 Amo Wavefront Sciences Llc System and method for measuring corneal topography
US7988290B2 (en) * 2007-06-27 2011-08-02 AMO Wavefront Sciences LLC. Systems and methods for measuring the shape and location of an object
US7988293B2 (en) * 2008-11-14 2011-08-02 AMO Wavefront Sciences LLC. Method of qualifying light spots for optical measurements and measurement instrument employing method of qualifying light spots
DE102010017837A1 (de) * 2010-04-22 2011-10-27 Carl Zeiss Meditec Ag Anordnung zur Erzielung hochgenauer Messwerte am Auge
US8622546B2 (en) 2011-06-08 2014-01-07 Amo Wavefront Sciences, Llc Method of locating valid light spots for optical measurement and optical measurement instrument employing method of locating valid light spots
BR112015024512B1 (pt) 2013-05-02 2022-02-22 Carl Zeiss Ag Método e sistema para determinar a estrutura espacial de um objeto, método para determinar o efeito óptico dependente de localização e direção de um objeto e uso de um sistema
DE102013208091B4 (de) * 2013-05-02 2019-05-09 Carl Zeiss Ag Vorrichtung und Verfahren zum Vermessen einer Flächentopografie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1721208A (en) * 1922-12-18 1929-07-16 American Optical Corp Eye-examining instrument
US1918540A (en) * 1930-03-12 1933-07-18 Zeiss Carl Fa Instrument for measuring the curvature of the cornea
US3169459A (en) * 1963-03-11 1965-02-16 Michael A Friedberg Method of determining surface contours of an eye
DE2641004C2 (de) * 1976-09-11 1981-12-17 Battelle-Institut E.V., 6000 Frankfurt Vorrichtung zur Messung der Hornhautkrümmung

Also Published As

Publication number Publication date
US4312574A (en) 1982-01-26
IT1114400B (it) 1986-01-27
JPS54108493A (en) 1979-08-25
DE2805084C3 (de) 1980-10-16
FR2416000A1 (fr) 1979-08-31
DE2805084A1 (de) 1979-08-09
DE2805084B2 (de) 1980-02-14
IT7947893A0 (it) 1979-02-05

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