FR1319100A - Method and device for rapid and precise focusing of projected image - Google Patents

Method and device for rapid and precise focusing of projected image

Info

Publication number
FR1319100A
FR1319100A FR893284A FR893284A FR1319100A FR 1319100 A FR1319100 A FR 1319100A FR 893284 A FR893284 A FR 893284A FR 893284 A FR893284 A FR 893284A FR 1319100 A FR1319100 A FR 1319100A
Authority
FR
France
Prior art keywords
rapid
projected image
precise focusing
focusing
precise
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
FR893284A
Other languages
French (fr)
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.)
Logetronics Inc
Original Assignee
Logetronics Inc
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 Logetronics Inc filed Critical Logetronics Inc
Priority to FR893284A priority Critical patent/FR1319100A/en
Application granted granted Critical
Publication of FR1319100A publication Critical patent/FR1319100A/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)
FR893284A 1962-04-04 1962-04-04 Method and device for rapid and precise focusing of projected image Expired FR1319100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR893284A FR1319100A (en) 1962-04-04 1962-04-04 Method and device for rapid and precise focusing of projected image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR893284A FR1319100A (en) 1962-04-04 1962-04-04 Method and device for rapid and precise focusing of projected image

Publications (1)

Publication Number Publication Date
FR1319100A true FR1319100A (en) 1963-02-22

Family

ID=8776053

Family Applications (1)

Application Number Title Priority Date Filing Date
FR893284A Expired FR1319100A (en) 1962-04-04 1962-04-04 Method and device for rapid and precise focusing of projected image

Country Status (1)

Country Link
FR (1) FR1319100A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469925A (en) * 1966-03-25 1969-09-30 Eastman Kodak Co Method for determining image sharpness
US3495913A (en) * 1965-06-07 1970-02-17 Fairchild Camera Instr Co Focal plane determining system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495913A (en) * 1965-06-07 1970-02-17 Fairchild Camera Instr Co Focal plane determining system
US3469925A (en) * 1966-03-25 1969-09-30 Eastman Kodak Co Method for determining image sharpness

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