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DE634848C - Handheld ophthalmoscope - Google Patents

Handheld ophthalmoscope

Info

Publication number
DE634848C
DE634848C DEK134662D DEK0134662D DE634848C DE 634848 C DE634848 C DE 634848C DE K134662 D DEK134662 D DE K134662D DE K0134662 D DEK0134662 D DE K0134662D DE 634848 C DE634848 C DE 634848C
Authority
DE
Germany
Prior art keywords
tube
light source
ophthalmoscope
handheld
illumination
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
DEK134662D
Other languages
German (de)
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.)
KIRURGISKA INSTRUMENT FABRIKS KIFA AB
Original Assignee
KIRURGISKA INSTRUMENT FABRIKS KIFA AB
Publication date
Priority to DEK134662D priority Critical patent/DE634848C/en
Application granted granted Critical
Publication of DE634848C publication Critical patent/DE634848C/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A61B3/1208Multiple lens hand-held instruments

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)

Description

Handophthalmoskop Die Erfindung betrifft ein Handophthalmoskop mit einem Tubus, der an einem Ende mit einer Lichtquelle und am anderen Ende mit einer reflektierenden Fläche zum Ablenken der Lichtstrahlen sowie mit einem am Tubus quer zu diesem in Höhe der Lichtquelle angebrachten Beleuchtungsrohr versehen ist.Hand ophthalmoscope The invention relates to a hand ophthalmoscope with a tube that has a light source on one end and a reflective surface for deflecting the light rays and with one on the tube across to this is provided at the level of the light source mounted lighting tube.

Es sind Augenspiegel cUeser Art bekannt, bei denen das Beleuchtungsrohr zur Beleuchtung von kleinen Tafeln u. dgl. dient, die der Patient bei der Untersuchung zu betrachten bzw. zu fixieren hat. Beim Erfindungsgegenstand sind die im Beleuchtungsrohr befindlichen Linsen so ausgebildet und angeordnet, daß sie in einer der Fokalbeleuchtung des zu untersuchenden Auges entsprechenden Entfernung ein reelles Bild der Lichtquelle erzeugen.There are ophthalmoscopes of this type known in which the lighting tube to illuminate small boards and the like, which the patient uses during the examination to look at or to fix. In the subject matter of the invention are those in the lighting tube Lenses located so designed and arranged that they are in one of the focal illumination of the eye to be examined corresponding distance a real image of the light source produce.

Die Zeichnung zeigt ein Ausführungsbeispiel des Erfindungsgegenstandes.The drawing shows an embodiment of the subject matter of the invention.

Der Tubus i ist in bekannter Weise an einem Ende mit einem Spiegel e und am anderen Ende mit einer Lichtquelle 3 versehen, an deren in den Tubus r eingeschobenepn, Sockel sich ein Handgriff q. anschließt.The tube i is in a known manner at one end with a mirror e and at the other end provided with a light source 3, at which in the tube r inserted pn, base itself a handle q. connects.

In der Höhe der Glühlampe 3 ist der Tubus i seitlich mit einer Öffnung versehen, an die sich ein Rohr 12 anschließt. In das Rohr 12 ist ein Kondensor 13 eingesetzt. Das vordere Ende des Rohres 12 ist verjüngt und mit einer in bzw. aus dem Strahlengang beweglichen Linse 1q. versehen. Diese Linsen 13 und 1q. sind so ausgebildet und bei im Strahlengang befindlicher Linse 1q. so zueinander angeordnet, daß sie in einer der Fokalbeleuchtung des zu untersuchenden Auges .entsprechenden Entfernung, also etwa z cm vom freien Ende des Beleuchtungsrohres 12 entfernt, ein reelles Bild der Lichtquelle erzeugen.At the level of the incandescent lamp 3, the tube i is laterally provided with an opening to which a tube 12 is connected. A condenser 13 is inserted into the tube 12. The front end of the tube 12 is tapered and provided with a lens 1q which can be moved into or out of the beam path. Mistake. These lenses 13 and 1q. are designed and with the lens 1q in the beam path. so arranged to each other that they generate a real image of the light source at a distance corresponding to the focal illumination of the eye to be examined, ie about z cm from the free end of the lighting tube 12.

Claims (1)

PATENTANSPRUCH: Handophthalmoskop mit einem Tubus, der an einem Ende mit einer Lichtquelle und am änderen Ende mit einer reflektierenden Fläche zum Ablenken der Lichtstrahlen sowie mit einem am Tubus quer zu @ diesem in Höhe der Lichtquelle angebrachten Beleuchtungsrohr versehen ist, dadurch gekennzeichnet, daß die Linsen (13, 14) des Beleuchtungsrohres(i2) so ausgebildet und angeordnet sind, daß sie in einer der Fokalbeleuchtung des zu untersuchenden Auges entsprechenden Entfernung ein reelles Bild der Lichtquelle erzeugen.PATENT CLAIM: Handheld ophthalmoscope with a tube which is provided at one end with a light source and at the other end with a reflective surface for deflecting the light rays and with a lighting tube attached to the tube transversely to this at the level of the light source, characterized in that the lenses (13, 14) of the illumination tube (i2) are designed and arranged so that they generate a real image of the light source at a distance corresponding to the focal illumination of the eye to be examined.
DEK134662D Handheld ophthalmoscope Expired DE634848C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK134662D DE634848C (en) Handheld ophthalmoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK134662D DE634848C (en) Handheld ophthalmoscope

Publications (1)

Publication Number Publication Date
DE634848C true DE634848C (en) 1936-09-04

Family

ID=7248175

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK134662D Expired DE634848C (en) Handheld ophthalmoscope

Country Status (1)

Country Link
DE (1) DE634848C (en)

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