KR840007472A - 오버 헤드 프로젝터 - Google Patents

오버 헤드 프로젝터

Info

Publication number
KR840007472A
KR840007472A KR1019830006347A KR830006347A KR840007472A KR 840007472 A KR840007472 A KR 840007472A KR 1019830006347 A KR1019830006347 A KR 1019830006347A KR 830006347 A KR830006347 A KR 830006347A KR 840007472 A KR840007472 A KR 840007472A
Authority
KR
South Korea
Prior art keywords
overhead projector
projector
overhead
Prior art date
Application number
KR1019830006347A
Other languages
English (en)
Other versions
KR890001175B1 (ko
Inventor
후랭크 반더워프 데니스
Original Assignee
미네소타 마이닝 앤드 매뉴팩츄어링 컴패니
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 미네소타 마이닝 앤드 매뉴팩츄어링 컴패니 filed Critical 미네소타 마이닝 앤드 매뉴팩츄어링 컴패니
Publication of KR840007472A publication Critical patent/KR840007472A/ko
Application granted granted Critical
Publication of KR890001175B1 publication Critical patent/KR890001175B1/ko

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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S353/00—Optics: image projectors
    • Y10S353/03—Transparent

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
KR1019830006347A 1983-01-03 1983-12-30 오버 헤드 프로젝터 KR890001175B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/455,425 US4436393A (en) 1983-01-03 1983-01-03 Distortion correction for an overhead projector system
US455425 1983-01-03

Publications (2)

Publication Number Publication Date
KR840007472A true KR840007472A (ko) 1984-12-07
KR890001175B1 KR890001175B1 (ko) 1989-04-26

Family

ID=23808752

Family Applications (2)

Application Number Title Priority Date Filing Date
KR1019830006350A KR890000458B1 (ko) 1983-01-03 1983-12-30 오버헤드 프로젝타(overhead projector)
KR1019830006347A KR890001175B1 (ko) 1983-01-03 1983-12-30 오버 헤드 프로젝터

Family Applications Before (1)

Application Number Title Priority Date Filing Date
KR1019830006350A KR890000458B1 (ko) 1983-01-03 1983-12-30 오버헤드 프로젝타(overhead projector)

Country Status (7)

Country Link
US (1) US4436393A (ko)
EP (1) EP0115901B1 (ko)
JP (2) JPS59136726A (ko)
KR (2) KR890000458B1 (ko)
BR (1) BR8400004A (ko)
CA (1) CA1240542A (ko)
DE (1) DE3467428D1 (ko)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790926A (fr) * 1971-11-05 1973-03-01 Ifoeverken Ab Dispositif en vue de raccorder le reservoir de chasse a la cuvette d'uncabinet d'aisances
US4561740A (en) * 1984-06-06 1985-12-31 Minnesota Mining And Manufacturing Company Dual-magnification rear projection lectern
EP0192023A3 (en) * 1985-02-21 1986-10-08 Casio Computer Company Limited Liquid crystal projector
US5032022A (en) * 1988-09-14 1991-07-16 Casio Computer Co., Ltd. Projector
US5220363A (en) * 1988-09-14 1993-06-15 Casio Computer Co., Ltd. Projector
US4986651A (en) * 1989-08-04 1991-01-22 Minnesota Mining And Manufacturing Company Overhead projector with centerless Fresnel lens reflective stage
JPH03209421A (ja) * 1990-01-12 1991-09-12 Victor Co Of Japan Ltd 光―光変換素子の応用装置
US5092672A (en) * 1991-06-07 1992-03-03 Minnesota Mining And Manufacturing Company Condenser lens system for overhead projector
US6141000A (en) * 1991-10-21 2000-10-31 Smart Technologies Inc. Projection display system with touch sensing on screen, computer assisted alignment correction and network conferencing
US5296882A (en) * 1992-12-21 1994-03-22 Minnesota Mining And Manufacturing Company Overhead projector with catadioptric fresnel lens
SE9300958L (sv) * 1993-03-23 1994-09-24 Nova Onab Optica Ab Offset projektor
US5400094A (en) * 1993-03-31 1995-03-21 Minnesota Mining And Manufacturing Company Condensers for overhead projectors
US5317349A (en) * 1993-06-29 1994-05-31 Minnesota Mining And Manufacturing Company Overhead projector with achromatic fresnel lens
US5355188A (en) * 1993-09-09 1994-10-11 In Focus Systems, Inc. Method and apparatus for distortion correction in optical projectors
US5416541A (en) * 1994-05-16 1995-05-16 Fog; Stephen C. Folding portable overhead projector
US5548357A (en) * 1995-06-06 1996-08-20 Xerox Corporation Keystoning and focus correction for an overhead projector
US5820242A (en) * 1996-03-29 1998-10-13 Minnesota Mining And Manufacturing Company Compact integrated LCD projector
US5639152A (en) * 1996-06-11 1997-06-17 Telex Communications, Inc. Collapsible LCD projector
US5722752A (en) * 1997-01-10 1998-03-03 In Focus Systems, Inc. Multimedia projection system with image quality correction
JPH1164787A (ja) * 1997-08-21 1999-03-05 Seiko Epson Corp 投写型表示装置
DE19737107C2 (de) 1997-08-26 2001-02-08 Fresnel Optics Gmbh Optische Anordnung bestehend aus mindestens zwei Fresnellinsen und Projektions- bzw. Displayvorrichtung mit dieser Anordnung
US6031608A (en) * 1998-09-03 2000-02-29 Foss Nirsystems, Inc. Spectroscopic instrument with offset grating to improve focus
GB2343526A (en) * 1998-11-04 2000-05-10 Int Optics Limited Objective arrangements for projectors
KR100333970B1 (ko) * 1999-08-31 2002-04-24 구자홍 키스톤 제거기능을 가지는 투사 표시장치
US20100006088A1 (en) * 2008-07-14 2010-01-14 Robert Owen Campbell Tracking Concentrator Employing Inverted Off-Axis Optics and Method
US11885738B1 (en) 2013-01-22 2024-01-30 J.A. Woollam Co., Inc. Reflectometer, spectrophotometer, ellipsometer or polarimeter system including sample imaging system that simultaneously meet the scheimpflug condition and overcomes keystone error

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547530A (en) * 1968-11-12 1970-12-15 Bell Telephone Labor Inc Overhead projector
JPS51933Y1 (ko) * 1969-06-17 1976-01-12
JPS5116755U (ko) * 1974-07-24 1976-02-06
DE2828245A1 (de) * 1978-06-28 1980-01-03 Rainer Wolfgang Landsee Projektor
JPS5557840A (en) * 1978-10-24 1980-04-30 Gakken Co Ltd Overhead projector capable of projecting on vertical plane

Also Published As

Publication number Publication date
JPS59136726A (ja) 1984-08-06
CA1240542A (en) 1988-08-16
JPH058555U (ja) 1993-02-05
KR890001175B1 (ko) 1989-04-26
KR840007473A (ko) 1984-12-07
JP2553427Y2 (ja) 1997-11-05
US4436393A (en) 1984-03-13
BR8400004A (pt) 1984-07-31
EP0115901A1 (en) 1984-08-15
KR890000458B1 (ko) 1989-03-17
DE3467428D1 (en) 1987-12-17
EP0115901B1 (en) 1987-11-11

Similar Documents

Publication Publication Date Title
KR840007472A (ko) 오버 헤드 프로젝터
DK298784D0 (da) Kobber-leder-praeparater
DK463784A (da) Klaebemiddel
BR8400003A (pt) Retroprojetor
ATA343284A (de) Raffrollo
DE3379173D1 (de) Photoradiator
AT377349B (de) Lusterbehang
AT387927B (de) Loetstation
FI840012A0 (fi) Tetrahydrokarbazolderivat
AT379328B (de) Waelzmuehle
AT387337B (de) Loipenspursetzgeraet
GB8432637D0 (en) Overhead projector
AT386759B (de) Schlagmuehle
ATA312084A (de) Bandsaatschar
DK24283D0 (da) Overheadprojektor
AT385002B (de) Geraeuschgedaempftes schienenrad
ATA224283A (de) Kronenstein
ATE23408T1 (de) Overhead-projektor.
BR8400130A (pt) Aperfeicoamento em projetor
AR229549A1 (es) Ladrillo-teja
IT1167418B (it) Idroselettore
BR8307309A (pt) Fiodentalizador
BR8306957A (pt) Economiza-agua
BR6300060U (pt) Sonofletor
ATA206583A (de) Stuetzfuesse

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19980402

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee