EP0073205A1 - Vorrichtung zur betrachtung eines bildes, getragen durch eine transparante unterlage - Google Patents

Vorrichtung zur betrachtung eines bildes, getragen durch eine transparante unterlage

Info

Publication number
EP0073205A1
EP0073205A1 EP19820900535 EP82900535A EP0073205A1 EP 0073205 A1 EP0073205 A1 EP 0073205A1 EP 19820900535 EP19820900535 EP 19820900535 EP 82900535 A EP82900535 A EP 82900535A EP 0073205 A1 EP0073205 A1 EP 0073205A1
Authority
EP
European Patent Office
Prior art keywords
plate
image
face
reflective
device allowing
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.)
Withdrawn
Application number
EP19820900535
Other languages
English (en)
French (fr)
Inventor
Hugo Coulon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0073205A1 publication Critical patent/EP0073205A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package

Definitions

  • the present invention relates to a device for observing an image carried by a transparent support and which, therefore, is mainly intended to allow the observation of photographic or radiological negatives or slides, for example.
  • Lighting devices comprising a plate of transparent material lit by the edge. Such devices are intended to make visible, by a contrasting effect, patterns presented by the anterior face of said plate.
  • the object of the present invention is to use a device of the same kind for the observation of photographic negatives or slides.
  • the single figure is a perspective view, with partial section, of a device allowing the observation of images carried by a transparent support.
  • the device shown comprises a plate 1 of artificial glass, known in the trade under the name of PLEXIGLAS (registered trademark), forming a light guide, whose lateral faces such as 2 are perfectly polished, and which is surrounded by a metal frame 3.
  • This frame encloses, along one of its sides, a lighting device constituted by a neon tube 4 and by a parabolic reflector 5.
  • the means ensuring the lighting of the plate 1, by its edge could be different (incandescent lamp, luminescent source or other), and that they could also extend along more than one sides of the plate, or even along all four sides of it.
  • the rear face 6 of the plate is coated with a reflective layer 7 affixed directly on it. This layer 7 could be replaced by a mirror applied against the face 6, provided that the contact is close to the point of actually making an optical contact, for example with intermediate application of Canada balsam.
  • the device further comprises a transparent sheet 8, forming a cover, articulated by means of a piano hinge 9 to the front face 3a of the part of the frame 3 covering the inner edge of the plate 1.
  • This cover 8 can occupy a position folded down, as shown in the drawing, and, by a rotation in the direction of the arrow 10 around the hinge 9, a second position in which its upper edge, designated by 11, slightly rounded, comes to hang on the front face 3a , of the part of the frame 3 covering the upper edge of the plate 1.
  • This part 3a of the frame 3 is chamfered at 12 to receive the edge 11 of the cover 8 while the same chamfer 12 of the front face 3a of the part of the frame 3 covering the lower edge of the plate is intended to receive the transparent film supporting the image to be observed.
  • the cover 8 is raised, applying the image tightly against the front face 13 of the plate 1.
  • the image, view, text or other is then made visible by the lighting to which the plate 1 is subjected.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
EP19820900535 1981-02-27 1982-02-23 Vorrichtung zur betrachtung eines bildes, getragen durch eine transparante unterlage Withdrawn EP0073205A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1325/81 1981-02-27
CH132581A CH640356A5 (fr) 1981-02-27 1981-02-27 Dispositif permettant l'observation d'une image portee par un support transparent.

Publications (1)

Publication Number Publication Date
EP0073205A1 true EP0073205A1 (de) 1983-03-09

Family

ID=4207802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820900535 Withdrawn EP0073205A1 (de) 1981-02-27 1982-02-23 Vorrichtung zur betrachtung eines bildes, getragen durch eine transparante unterlage

Country Status (3)

Country Link
EP (1) EP0073205A1 (de)
CH (1) CH640356A5 (de)
WO (1) WO1982002959A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5980840A (en) * 1997-04-25 1999-11-09 Bp Amoco Corporation Autothermic reactor and process using oxygen ion--conducting dense ceramic membrane

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233005C2 (de) * 1982-09-04 1984-07-26 W.C. Heraeus Gmbh, 6450 Hanau Gerät zur Prüfung der Echtheit von Wertzeichen
DE8315274U1 (de) * 1983-05-25 1983-11-03 W.C. Heraeus Gmbh, 6450 Hanau Druckaufnahmekoerper fuer ein pruefgeraet
DE9217383U1 (de) * 1992-12-19 1993-02-18 Roehm Gmbh, 6100 Darmstadt Lichtleitplatten zur Beleuchtung auswechselbarer Informationen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE531639A (de) *
CH192945A (de) * 1936-11-16 1937-09-15 Mueller Daley J Reklamevorrichtung.
US3197902A (en) * 1962-08-22 1965-08-03 Emerson Electric Co Light responsive sign
US4059916A (en) * 1975-01-30 1977-11-29 Copal Company Limited Light diffusing device
GB2030750A (en) * 1978-10-04 1980-04-10 Pierre Lo International Ltd Illuminated signs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8202959A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5980840A (en) * 1997-04-25 1999-11-09 Bp Amoco Corporation Autothermic reactor and process using oxygen ion--conducting dense ceramic membrane

Also Published As

Publication number Publication date
CH640356A5 (fr) 1983-12-30
WO1982002959A1 (en) 1982-09-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830511