FR2413686A1 - COMPACT VIEWER FOR MICROFICHES OR CASSETTES - Google Patents

COMPACT VIEWER FOR MICROFICHES OR CASSETTES

Info

Publication number
FR2413686A1
FR2413686A1 FR7726064A FR7726064A FR2413686A1 FR 2413686 A1 FR2413686 A1 FR 2413686A1 FR 7726064 A FR7726064 A FR 7726064A FR 7726064 A FR7726064 A FR 7726064A FR 2413686 A1 FR2413686 A1 FR 2413686A1
Authority
FR
France
Prior art keywords
projected
sheet
microfiches
cassettes
prisms
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.)
Granted
Application number
FR7726064A
Other languages
French (fr)
Other versions
FR2413686B1 (en
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.)
Izon Corp
Original Assignee
Izon Corp
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 Izon Corp filed Critical Izon Corp
Publication of FR2413686A1 publication Critical patent/FR2413686A1/en
Application granted granted Critical
Publication of FR2413686B1 publication Critical patent/FR2413686B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

L'INVENTION CONCERNE UN LECTEUR DE MICROFICHES COMPACT. LA LUMIERE 12 PROVENANT D'UNE MICROFICHE OU D'UN MICROFILM EN CASSETTE EST PROJETEE SUR DES MIROIRS 14, 44, 16 ET EST L'OBJET DE PLUSIEURS REFLEXIONS AVANT DE FRAPPER UN ECRAN D'OBSERVATION 46. L'UNE DES SURFACES REFLECHISSANTES EST FORMEE PAR UNE FEUILLE DE PRISMES 44 COMPORTANT UNE MULTIPLICITE DE PRISMES. LA LUMIERE PROJETEE PAR LE MIROIR 14 EST AINSI REFLECHIE PAR CETTE FEUILLE TANDIS QUE CELLE PROJETEE PAR LE MIROIR 16 LA TRAVERSE POUR PARVENIR A L'ECRAN 46. LA FEUILLE DE PRISME REMPLIT AINSI UNE FONCTION DOUBLE. D'AUTRES MODES DE REALISATION UTILISENT DES ECRANS ET MIROIRS PLIANTS POUR REDUIRE LES DIMENSIONS DU LECTEUR. L'INVENTION EST APPLICABLE AUX VISIONNEUSES.THE INVENTION RELATES TO A COMPACT MICROFILE READER. THE LIGHT 12 FROM A MICROFICHE OR CASSETTE MICROFILM IS PROJECTED ON MIRRORS 14, 44, 16 AND IS THE SUBJECT OF SEVERAL THOUGHTS BEFORE HITTING AN OBSERVATION SCREEN 46. ONE OF THE REFLECTING SURFACES IS FORMED BY A SHEET OF PRISMS 44 CONTAINING A MULTIPLICITY OF PRISMS. THE LIGHT PROJECTED BY THE MIRROR 14 IS THUS REFLECTED BY THIS SHEET WHILE THAT PROJECTED BY THE MIRROR 16 CROSSES IT TO GET TO THE SCREEN 46. THE PRISM SHEET FULFILLS A DUAL FUNCTION. OTHER EMBODIMENTS USE FOLDING SCREENS AND MIRRORS TO REDUCE THE DIMENSIONS OF THE READER. THE INVENTION IS APPLICABLE TO VIEWERS.

FR7726064A 1976-09-13 1977-08-26 COMPACT VIEWER FOR MICROFICHES OR CASSETTES Granted FR2413686A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71785876A 1976-09-13 1976-09-13

Publications (2)

Publication Number Publication Date
FR2413686A1 true FR2413686A1 (en) 1979-07-27
FR2413686B1 FR2413686B1 (en) 1984-05-18

Family

ID=24883776

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7726064A Granted FR2413686A1 (en) 1976-09-13 1977-08-26 COMPACT VIEWER FOR MICROFICHES OR CASSETTES

Country Status (13)

Country Link
JP (1) JPS5341227A (en)
AT (1) AT368640B (en)
BE (1) BE858178A (en)
BR (1) BR7705679A (en)
CA (1) CA1103492A (en)
DE (1) DE2738658C3 (en)
ES (1) ES461877A1 (en)
FR (1) FR2413686A1 (en)
GB (1) GB1590679A (en)
HK (1) HK41884A (en)
IN (1) IN149132B (en)
MX (1) MX148985A (en)
NL (1) NL7709456A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54163927U (en) * 1978-05-10 1979-11-16
DE2906477C3 (en) 1979-02-20 1995-02-09 Rohrmoser Alois Skifabrik Ski brake
GB8804402D0 (en) * 1988-02-25 1988-03-23 Emi Plc Thorn Display device
US8562145B2 (en) 2011-06-22 2013-10-22 3M Innovative Properties Company Display system and method for projection onto non-planar surfaces

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692399A (en) * 1970-06-23 1972-09-19 Stewart Filmscreen Corp Microfilm viewer
US3711188A (en) * 1970-06-10 1973-01-16 Visidyne Inc Compact optical display system
US3782805A (en) * 1972-11-30 1974-01-01 Qantix Corp Front projection screen made from a transparent material
US3846012A (en) * 1973-11-14 1974-11-05 Qantix Corp Transparent front projection screen having concave ridges thereon
US3941467A (en) * 1974-10-29 1976-03-02 Kaptron, Inc. Optical projector/reader

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345141B2 (en) * 1973-12-18 1978-12-04

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711188A (en) * 1970-06-10 1973-01-16 Visidyne Inc Compact optical display system
US3692399A (en) * 1970-06-23 1972-09-19 Stewart Filmscreen Corp Microfilm viewer
US3782805A (en) * 1972-11-30 1974-01-01 Qantix Corp Front projection screen made from a transparent material
US3846012A (en) * 1973-11-14 1974-11-05 Qantix Corp Transparent front projection screen having concave ridges thereon
US3941467A (en) * 1974-10-29 1976-03-02 Kaptron, Inc. Optical projector/reader

Also Published As

Publication number Publication date
JPS6210418B2 (en) 1987-03-06
DE2738658B2 (en) 1979-10-11
GB1590679A (en) 1981-06-03
JPS5341227A (en) 1978-04-14
CA1103492A (en) 1981-06-23
NL7709456A (en) 1978-03-15
DE2738658A1 (en) 1978-03-16
IN149132B (en) 1981-09-19
BE858178A (en) 1977-12-16
ES461877A1 (en) 1978-12-01
DE2738658C3 (en) 1980-08-07
BR7705679A (en) 1978-06-27
ATA614277A (en) 1982-02-15
HK41884A (en) 1984-05-18
AT368640B (en) 1982-10-25
MX148985A (en) 1983-08-05
FR2413686B1 (en) 1984-05-18

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Legal Events

Date Code Title Description
ST Notification of lapse