GB1285870A - Focusing system for a projector - Google Patents

Focusing system for a projector

Info

Publication number
GB1285870A
GB1285870A GB35309/70A GB3530970A GB1285870A GB 1285870 A GB1285870 A GB 1285870A GB 35309/70 A GB35309/70 A GB 35309/70A GB 3530970 A GB3530970 A GB 3530970A GB 1285870 A GB1285870 A GB 1285870A
Authority
GB
United Kingdom
Prior art keywords
screen
light
arrangement
photo
transparency
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
GB35309/70A
Other languages
English (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.)
GAF Corp
Original Assignee
GAF 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 GAF Corp filed Critical GAF Corp
Publication of GB1285870A publication Critical patent/GB1285870A/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
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Projection Apparatus (AREA)
  • Focusing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
GB35309/70A 1969-07-22 1970-07-21 Focusing system for a projector Expired GB1285870A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84331169A 1969-07-22 1969-07-22
US3795070A 1970-05-18 1970-05-18

Publications (1)

Publication Number Publication Date
GB1285870A true GB1285870A (en) 1972-08-16

Family

ID=26714651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35309/70A Expired GB1285870A (en) 1969-07-22 1970-07-21 Focusing system for a projector

Country Status (11)

Country Link
JP (1) JPS5012304B1 (de)
AT (1) AT312324B (de)
BE (1) BE753741A (de)
CA (1) CA948908A (de)
CH (1) CH516172A (de)
DE (2) DE2036119C3 (de)
FR (1) FR2053071B1 (de)
GB (1) GB1285870A (de)
IL (1) IL34951A (de)
NL (1) NL7010832A (de)
SE (1) SE360747B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194389A (en) * 1986-08-20 1988-03-02 Agency Ind Science Techn Optical control circuit and semiconductor device
EP1408360A3 (de) * 2002-10-11 2004-07-28 Agfa Corporation Fokussiersystem und Methode zum Gebrauch in Abbildungssystemen
US6835921B2 (en) 2000-11-15 2004-12-28 Agfa Corporation Focusing system for use in imaging systems

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2518767A1 (fr) * 1981-12-17 1983-06-24 Centre Nat Etd Spatiales Procede de reglage automatique de la nettete d'images projetees sur un ecran et dispositifs pour la mise en oeuvre dudit procede
DE3325042A1 (de) * 1983-07-12 1984-02-23 Kodak Ag, 7000 Stuttgart Selbstfokussiervorrichtung
DE4116803A1 (de) * 1991-05-23 1992-12-10 Agfa Gevaert Ag Vorrichtung zur gleichmaessigen ausleuchtung einer projektionsflaeche

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194389A (en) * 1986-08-20 1988-03-02 Agency Ind Science Techn Optical control circuit and semiconductor device
GB2194389B (en) * 1986-08-20 1990-02-14 Agency Ind Science Techn Optical control circuit and semiconductor device for realizing the circuit
US6835921B2 (en) 2000-11-15 2004-12-28 Agfa Corporation Focusing system for use in imaging systems
EP1408360A3 (de) * 2002-10-11 2004-07-28 Agfa Corporation Fokussiersystem und Methode zum Gebrauch in Abbildungssystemen

Also Published As

Publication number Publication date
DE2036119B2 (de) 1973-08-23
FR2053071A1 (de) 1971-04-16
AT312324B (de) 1973-12-27
BE753741A (fr) 1970-12-31
IL34951A0 (en) 1970-09-17
DE2036119C3 (de) 1974-03-28
FR2053071B1 (de) 1977-11-04
JPS5012304B1 (de) 1975-05-10
DE7027406U (de) 1970-12-03
NL7010832A (de) 1971-01-26
CA948908A (en) 1974-06-11
IL34951A (en) 1973-02-28
DE2036119A1 (de) 1971-02-04
SE360747B (de) 1973-10-01
CH516172A (de) 1971-11-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees