DE202015006698U1 - Mirror system for generating a test pattern separable by polarizing filter from a single display image - Google Patents

Mirror system for generating a test pattern separable by polarizing filter from a single display image Download PDF

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DE202015006698U1
DE202015006698U1 DE202015006698.4U DE202015006698U DE202015006698U1 DE 202015006698 U1 DE202015006698 U1 DE 202015006698U1 DE 202015006698 U DE202015006698 U DE 202015006698U DE 202015006698 U1 DE202015006698 U1 DE 202015006698U1
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mirror system
mirror
separable
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BLOCK OPTIC DESIGN GMBH, DE
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    • 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
    • A61B3/0016—Operational features thereof
    • A61B3/0041—Operational features thereof characterised by display arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system

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Abstract

Spiegelsystem, dadurch gekennzeichnet, dass zwei totalreflektierende Spiegel (3) (4) zwei Teilbereiche (1) (2) eines Displays auf einen teildurchlässigen Spiegel (5) lenken, sodass die gespiegelten Teilbereiche durch Polfilter trennbar überlagert werden.Mirror system, characterized in that two total reflecting mirrors (3) (4) direct two subregions (1) (2) of a display on a partially transparent mirror (5), so that the mirrored subregions are superimposed by polarizing filters separable.

Description

Bisher war es in der Augenheilkunde üblich, die Nahprüfung mit handgehaltenen Lesetafeln oder hintergrundbeleuchteten Folien, auf denen die Sehzeichen abgebildet waren, durchzuführen. Neuerdings werden auch elektronische Systeme, sogenannte Tablet Computer, benutzt.So far, it has been customary in ophthalmology to carry out the near examination with handheld reading boards or backlit films on which the optotypes were displayed. Recently, electronic systems, so-called tablet computers, are used.

Zur monokularen Prüfung unter binokularen Bedingungen lassen sich damit Testbilder erzeugen, die über Farbfilter trennbar sind.For monocular examination under binocular conditions, test images can be generated which can be separated by means of color filters.

Die Technik der Phasendifferenztrennung wie sie für Fernsichtprüfgeräte etabliert ist ( EP 0595023 , DE 10 2004 032 819 ) kann nicht für die Nahsichtprüfung genutzt werden. Eine höhere Auflösung und eine geringerere Betrachtungsdistanz reduzieren den Einblickwinkel. Dieser Einblickwinkel variiert bei kurzen Distanzen zudem stärker.The technique of phase difference separation as established for distance vision testers ( EP 0595023 . DE 10 2004 032 819 ) can not be used for the near vision test. A higher resolution and a shorter viewing distance reduce the viewing angle. This viewing angle also varies more with short distances.

Mit einem teildurchlässigen Spiegel und einer Kombination aus zwei Displays wurde deshalb eine alternative Methode für die Nähe realisiert ( DE 20 2015 000 243 U1 ).With a semitransparent mirror and a combination of two displays, an alternative method for proximity was therefore realized ( DE 20 2015 000 243 U1 ).

Das in Schutzanspruch 1 beschriebene Merkmal erlaubt jetzt die Verwendung eines einzigen Displays. Ein solches Spiegelsystem kann Displayunabgängig gefertigt ung kalibriert werden. Die optionale Nutzung auf handelsüblichen Tablet-Computern ist damit möglich, solange diese zirkular oder linear polarisiertes Licht emittieren.The feature described in protection claim 1 now allows the use of a single display. Such a mirror system can be calibrated display independent. The optional use on standard tablet computers is thus possible as long as they emit circularly or linearly polarized light.

In 1 ist ein Ausführungsbeispiel gezeigt. Die zwei Teilbereiche (1) (2) des Displays werden so durch die totalreflektierenden Spiegel (3) (4) auf den teildurchlässigen Spiegel (5) gelenkt, dass diese dahinter gemischt wahrgenommen werden.In 1 an embodiment is shown. The two subareas ( 1 ) ( 2 ) of the display are so by the total reflecting mirror ( 3 ) ( 4 ) on the partially transparent mirror ( 5 ) that they are perceived mixed behind it.

Die Orientierung der Normalenvektoren der totalreflektierenden Spiegelebenen n →1, n →2, der Displayebene n →D und der teildurchlässigen Spiegelebene n →H lassen sich erfindungsgemäß durch folgende Winkelbeziehungen bechreiben:

Figure DE202015006698U1_0002
The orientation of the normal vectors of the totally reflecting mirror planes n → 1 , n → 2 , the display plane n → D and the semitransparent mirror plane n → H can be described according to the invention by the following angle relationships:
Figure DE202015006698U1_0002

Die genaue Position und Größe der Spiegel sind maßgeblich für die Größe des Testbildes. Es ist zweckmäßig, das gemischte Bild durch einen weiteren Spiegel (6) umzulenken. Dadurch kann das generierte Testfeld auch aus gleichen Richtung betrachtet werden, wie das Display selbst.The exact position and size of the mirrors are decisive for the size of the test image. It is convenient to replace the mixed image with another mirror ( 6 ) to divert. As a result, the generated test field can also be viewed from the same direction as the display itself.

Der Proband trägt während der Prüfung eine Probierbrille mit den benötigten Analysatoren. In der Ophthalmologie werden entweder lineare oder zirkulare Polarisationsfilter eingesetzt. Mithilfe einer λ/4-Verzögerungsplatte im Strahlengang ist die Polarisation des Geräts bei Bedarf auf nicht zur Displaypolarisation passende Filtersysteme anpassbar.The test person wears a test specimen with the required analyzers during the test. In ophthalmology, either linear or circular polarizing filters are used. Using a λ / 4 retardation plate in the beam path, the polarization of the device can be adjusted to non-display polarization filter systems as needed.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Displaybereichdisplay area
22
Displaybereichdisplay area
33
totalreflektierender Spiegeltotally reflective mirror
44
totalreflektierender Spiegeltotally reflective mirror
55
Teildurchlässiger SpiegelPartly transparent mirror
66
optionaler totalrefkletierender Spiegeloptional totalreflecting mirror

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • EP 0595023 [0003] EP 0595023 [0003]
  • DE 102004032819 [0003] DE 102004032819 [0003]
  • DE 202015000243 U1 [0004] DE 202015000243 U1 [0004]

Claims (5)

Spiegelsystem, dadurch gekennzeichnet, dass zwei totalreflektierende Spiegel (3) (4) zwei Teilbereiche (1) (2) eines Displays auf einen teildurchlässigen Spiegel (5) lenken, sodass die gespiegelten Teilbereiche durch Polfilter trennbar überlagert werden.Mirror system, characterized in that two total reflecting mirrors ( 3 ) ( 4 ) two subareas ( 1 ) ( 2 ) of a display on a partially transparent mirror ( 5 ), so that the mirrored subregions are superimposed by polarizing filters separable. Spiegelsystem, dadurch gekennzeichnet, dass die totalreflektierenden Spiegel in π/3 zueinander, in π/6 zum teildurchlässigen Spiegel und in π/4 zum Display orientiert sind.Mirror system, characterized in that the total reflecting mirror are oriented in π / 3 to each other, in π / 6 to the partially transparent mirror and in π / 4 to the display. Spiegelsystem, dadurch gekennzeichnet, dass das zu verwendende Display lineares oder zirkulares Licht emittiert.Mirror system, characterized in that the display to be used emits linear or circular light. Spiegelsystem, dadurch gekennzeichnet, dass bei Bedarf weitere Spiegel (6) das überlagerte Bild in Richtung des Betrachters lenken können.Mirror system, characterized in that, if necessary, further mirrors ( 6 ) can direct the overlaid image towards the viewer. Spiegelsystem, dadurch gekennzeichnet, dass das Prüffeld mittels einer oder mehreren λ/4-Platten auf andere Trennfilter angepasst werden kann.Mirror system, characterized in that the test field can be adjusted by means of one or more λ / 4 plates to other separation filter.
DE202015006698.4U 2015-09-24 2015-09-24 Mirror system for generating a test pattern separable by polarizing filter from a single display image Active DE202015006698U1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595023A1 (en) 1992-10-23 1994-05-04 Carl Zeiss Image-forming system for stereoscopic viewing
DE102004032819A1 (en) 2004-07-07 2006-02-02 Block Optic Ltd. Eye testing system, has micro-retarder placed in front of monitor screen, with image covering regions having different phase-shift states
DE202015000243U1 (en) 2015-01-09 2015-02-18 Block Optic Ltd. Handheld electronic near vision tester

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595023A1 (en) 1992-10-23 1994-05-04 Carl Zeiss Image-forming system for stereoscopic viewing
DE102004032819A1 (en) 2004-07-07 2006-02-02 Block Optic Ltd. Eye testing system, has micro-retarder placed in front of monitor screen, with image covering regions having different phase-shift states
DE202015000243U1 (en) 2015-01-09 2015-02-18 Block Optic Ltd. Handheld electronic near vision tester

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