GB185395A - Improvements in or relating to optical projection apparatus - Google Patents

Improvements in or relating to optical projection apparatus

Info

Publication number
GB185395A
GB185395A GB17453/22A GB1745322A GB185395A GB 185395 A GB185395 A GB 185395A GB 17453/22 A GB17453/22 A GB 17453/22A GB 1745322 A GB1745322 A GB 1745322A GB 185395 A GB185395 A GB 185395A
Authority
GB
United Kingdom
Prior art keywords
relating
projection apparatus
optical projection
optical
projection
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
GB17453/22A
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.)
ED LIESEGANG
Liesegang Ed
Original Assignee
ED LIESEGANG
Liesegang Ed
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 ED LIESEGANG, Liesegang Ed filed Critical ED LIESEGANG
Publication of GB185395A publication Critical patent/GB185395A/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
    • G03B21/08—Projectors or projection-type viewers; Accessories therefor affording epidiascopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
GB17453/22A 1921-08-29 1922-06-24 Improvements in or relating to optical projection apparatus Expired GB185395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE185395X 1921-08-29

Publications (1)

Publication Number Publication Date
GB185395A true GB185395A (en) 1923-04-05

Family

ID=5719423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17453/22A Expired GB185395A (en) 1921-08-29 1922-06-24 Improvements in or relating to optical projection apparatus

Country Status (1)

Country Link
GB (1) GB185395A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719547A (en) * 1986-09-19 1988-01-12 Minnesota Mining And Manufacturing Company Illumination system for overhead projector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719547A (en) * 1986-09-19 1988-01-12 Minnesota Mining And Manufacturing Company Illumination system for overhead projector

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