DE501982C - Ophthalmoscope - Google Patents
OphthalmoscopeInfo
- Publication number
- DE501982C DE501982C DEL76184D DEL0076184D DE501982C DE 501982 C DE501982 C DE 501982C DE L76184 D DEL76184 D DE L76184D DE L0076184 D DEL0076184 D DE L0076184D DE 501982 C DE501982 C DE 501982C
- Authority
- DE
- Germany
- Prior art keywords
- ophthalmoscope
- paraboloid
- axis
- lamp
- mirror
- 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
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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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)
- Optical Elements Other Than Lenses (AREA)
Description
Ophthalmoskop Während die im allgeageünen gebrauchten einfachen Ophthalmoskope Plan- und konkave Spiegel besitzen, besteht der Spiegel des Ophthalmoskops nach der Erfindung aus einem Paraboloid'seent.Ophthalmoscope While the simple ophthalmoscopes used in general If you have planar and concave mirrors, the mirror of the ophthalmoscope persists of the invention from a Paraboloid'seent.
Der Erfindungsgegenstand ist in der Zeichnung in einer be;spielswe@sen Ausführungsform dargestellt und im folgenden näher erläutert.The subject of the invention is shown in the drawing in an example Embodiment shown and explained in more detail below.
Abb. i ist eine Draufsicht auf das.Ophthalmoskop, Abb. 2 ein Schnitt gemäß Linie A-B von Abb. i, und Abb.3 ist eine perspektivische Darstellung des Ophthahnoskops.Fig. I is a plan view of the ophthalmoscope, Fig. 2 is a section according to line A-B of Fig. i, and Fig. 3 is a perspective view of the ophthalmoscope.
Das Ophthahn@oskop ist im wesentll@chen zusammengesetzt aus einem m!it spiegelnder Oberfläche versehenen metallischen Segment a, a, das aus einem. Parab,ol'oid mit einer Brennweite von ungefähr 2 bis 2,5 cm herausgeschnitten ist.The ophthahn @oscope is essentially composed of a metallic segment a, a provided with a reflective surface, which consists of a. Parab, ol'oid is cut out with a focal length of about 2 to 2.5 cm.
In .dem Spiegelsegment ist in der Achse des Paraboloids x-x auf der konkaven Seite ein Lampenhalter L angebracht, der eine ,gewöhnliche elektrische Lampe von etwa ,3. bis 3,5 Volt trägt.In .dem mirror segment is in the axis of the paraboloid x-x on the Concave side attached a lamp holder L, the one, ordinary electrical Lamp of about, 3. carries up to 3.5 volts.
Der Lichtpunkt der Lampe mnlß auf den Brennpunkt f des Parabiololds eingestellt sein. Das-Spiegelsegment besitzt eine kleine Öffnung b von einem Durchmesser von :1 bis 6 mm.The point of light of the lamp must point to the focal point f of the parabiolold be set. The mirror segment has a small opening b of a diameter from: 1 to 6 mm.
Das Spiegelsegment und der Lampenhalter mit Lampe sind zusammen in einem metallischen Gehäuse eingeschlossen, dessen geschwärzte Wände durch die Unigin d, d und d, e (Abb.2) schematisch angedeutet sünd. Die Wand d, d verläuft rechtwütklpg zur Achse x-x des Paraboloids. Sie hat c#Ine runde Öffnung p-p, von ,einem Durchmesser von .etwa 1,5 bis 2 Cm, durch deren ettelpunkt die Linie y-y parallel zur Achse des Paraboloids und auch durch den Mittelpunkt der Öffnung b geht.The mirror segment and the lamp holder with lamp are enclosed together in a metal housing, the blackened walls of which are indicated schematically by the unigin d, d and d, e (Fig.2). The wall d, d runs right-angled to the axis xx of the paraboloid. It has a round opening pp, of, with a diameter of about 1.5 to 2 cm, through the attachment point of which the line yy runs parallel to the axis of the paraboloid and also through the center of the opening b.
Diese Öffnung p-p dient dazu, ein parallel zur Achse des Paraboloids reflektiertes, zylindrisches Strahlenbündel r-r zur Beleuchtung des zu untersuchenden Auges durchzulassen.This opening p-p serves to be parallel to the axis of the paraboloid reflected, cylindrical bundle of rays r-r for illuminating the object to be examined Let through the eye.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL76184D DE501982C (en) | Ophthalmoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL76184D DE501982C (en) | Ophthalmoscope |
Publications (1)
Publication Number | Publication Date |
---|---|
DE501982C true DE501982C (en) | 1930-07-08 |
Family
ID=7283889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL76184D Expired DE501982C (en) | Ophthalmoscope |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE501982C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025754A (en) * | 1957-05-08 | 1962-03-20 | Mirsky David | Strabismic fusion measure and training apparatus |
-
0
- DE DEL76184D patent/DE501982C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025754A (en) * | 1957-05-08 | 1962-03-20 | Mirsky David | Strabismic fusion measure and training apparatus |
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