FR667154A - Optical system for projection devices - Google Patents

Optical system for projection devices

Info

Publication number
FR667154A
FR667154A FR667154DA FR667154A FR 667154 A FR667154 A FR 667154A FR 667154D A FR667154D A FR 667154DA FR 667154 A FR667154 A FR 667154A
Authority
FR
France
Prior art keywords
optical system
projection devices
projection
devices
optical
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
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.)
COX MULTI COLOR PHOTO Co
Original Assignee
COX MULTI COLOR PHOTO Co
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 COX MULTI COLOR PHOTO Co filed Critical COX MULTI COLOR PHOTO Co
Application granted granted Critical
Publication of FR667154A publication Critical patent/FR667154A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR667154D 1928-12-29 1928-12-29 Optical system for projection devices Expired FR667154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR667154T 1928-12-29

Publications (1)

Publication Number Publication Date
FR667154A true FR667154A (en) 1929-10-14

Family

ID=9014244

Family Applications (1)

Application Number Title Priority Date Filing Date
FR667154D Expired FR667154A (en) 1928-12-29 1928-12-29 Optical system for projection devices

Country Status (1)

Country Link
FR (1) FR667154A (en)

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