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GB1134831A - Improvements in or relating to optical depth assessing apparatus - Google Patents

Improvements in or relating to optical depth assessing apparatus

Info

Publication number
GB1134831A
GB1134831A GB891265A GB891265A GB1134831A GB 1134831 A GB1134831 A GB 1134831A GB 891265 A GB891265 A GB 891265A GB 891265 A GB891265 A GB 891265A GB 1134831 A GB1134831 A GB 1134831A
Authority
GB
United Kingdom
Prior art keywords
observer
eye
panels
panel
representation
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
GB891265A
Inventor
Richard Langton Gregory
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.)
NAT RES DEV
National Research Development Corp UK
Original Assignee
NAT RES DEV
National Research Development Corp UK
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 NAT RES DEV, National Research Development Corp UK filed Critical NAT RES DEV
Priority to GB891265A priority Critical patent/GB1134831A/en
Publication of GB1134831A publication Critical patent/GB1134831A/en
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
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
    • 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
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/08—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing binocular or stereoscopic vision, e.g. strabismus

Landscapes

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

Abstract

1,134,831. Eye examining apparatus. NATIONAL RESEARCH DEVELOPMENT CORP. May 12, 1966 [March 2, 1965], No.8912/65. Heading G2J. The apparatus presents to one eye of an observer a first object and to his two eyes a second object which can take up different positions spaced from the observer. The indication of the distance of the second object obtained by binocular vision can be used to assess the distance of the first object. As shown, the apparatus is in the form of a box having electro-luminescent panels 11, 12, the latter being on a hinged door, and containing a partial reflector 18 so that the observer's eyes 13, 14 can view the two panels in super-position. In use panel 12 is swung out of the way, illuminated disc 21 is supported on rods so that its distance away from the observer can be varied and measured and a three-dimensional representation 15 is supported on panel 11. In addition, a polarizer covers the representation 15 and a crossed analyser 25 is disposed in front of the observer's eye 13. The apparatus can also be used to determine an observer's response to changes in illumination intensity by removing the illuminated disc 21, representation 15 and the polarizer and analyser and instead disposing apertured masks over the panels 11, 12 which are energized through a transformer so that the intensities may be varied while keeping constant the ratio between the difference in their intensities to the intensity of panel 11. Flicker phenomena may similarly be investigated. The apparatus may also be used as a stereoscope or a tachnistoscope.
GB891265A 1965-03-02 1965-03-02 Improvements in or relating to optical depth assessing apparatus Expired GB1134831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB891265A GB1134831A (en) 1965-03-02 1965-03-02 Improvements in or relating to optical depth assessing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB891265A GB1134831A (en) 1965-03-02 1965-03-02 Improvements in or relating to optical depth assessing apparatus

Publications (1)

Publication Number Publication Date
GB1134831A true GB1134831A (en) 1968-11-27

Family

ID=9861722

Family Applications (1)

Application Number Title Priority Date Filing Date
GB891265A Expired GB1134831A (en) 1965-03-02 1965-03-02 Improvements in or relating to optical depth assessing apparatus

Country Status (1)

Country Link
GB (1) GB1134831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463606A1 (en) * 1979-08-22 1981-02-27 Essilor Int DEVICE FOR CONTROLLING THE PHORIE OF AN INDIVIDUAL IN VISION RECONCILED
US20220054003A1 (en) * 2020-08-20 2022-02-24 Huvitz Co., Ltd. Polarized visual acuity chart projector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463606A1 (en) * 1979-08-22 1981-02-27 Essilor Int DEVICE FOR CONTROLLING THE PHORIE OF AN INDIVIDUAL IN VISION RECONCILED
US4411501A (en) 1979-08-22 1983-10-25 Essilor International Device for checking the phoria of an individual under conditions of close vision
US20220054003A1 (en) * 2020-08-20 2022-02-24 Huvitz Co., Ltd. Polarized visual acuity chart projector

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