ES461877A1 - Compact optical viewer for microfiche and cassette - Google Patents

Compact optical viewer for microfiche and cassette

Info

Publication number
ES461877A1
ES461877A1 ES461877A ES461877A ES461877A1 ES 461877 A1 ES461877 A1 ES 461877A1 ES 461877 A ES461877 A ES 461877A ES 461877 A ES461877 A ES 461877A ES 461877 A1 ES461877 A1 ES 461877A1
Authority
ES
Spain
Prior art keywords
light
reflecting surfaces
microfiche
cassette
cone
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
ES461877A
Other languages
Spanish (es)
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 ES461877A1 publication Critical patent/ES461877A1/en
Expired 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

An improved optical projector device of the projector type is a cone of light from an illuminated microimage, which includes a plurality of reflecting surfaces to intercept and repeatedly reposition or deflect a cone of light, one of said reflecting surfaces reflecting the light incident therein. With angles greater than a critical angle but transmitting through it the light that arrives at any angle of incidence less than the critical angle, said projector being characterized by the fact that the first mentioned of said reflecting surfaces is defined by a prism sheet, and for having an observation screen parallel and contiguous but separated at a certain distance from the prism sheet. (Machine-translation by Google Translate, not legally binding)
ES461877A 1976-09-13 1977-08-25 Compact optical viewer for microfiche and cassette Expired ES461877A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES461877A1 true ES461877A1 (en) 1978-12-01

Family

ID=24883776

Family Applications (1)

Application Number Title Priority Date Filing Date
ES461877A Expired ES461877A1 (en) 1976-09-13 1977-08-25 Compact optical viewer for microfiche and cassette

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

Family Cites Families (6)

* 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
JPS5345141B2 (en) * 1973-12-18 1978-12-04
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
FR2413686A1 (en) 1979-07-27
NL7709456A (en) 1978-03-15
DE2738658A1 (en) 1978-03-16
IN149132B (en) 1981-09-19
BE858178A (en) 1977-12-16
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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ES320525A1 (en) Procedure for the obtaining of image and panoramic light, with a single source, applicable to different uses. (Machine-translation by Google Translate, not legally binding)
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