GB552371A - Improvements in or relating to optical lanterns - Google Patents

Improvements in or relating to optical lanterns

Info

Publication number
GB552371A
GB552371A GB9597/41A GB959741A GB552371A GB 552371 A GB552371 A GB 552371A GB 9597/41 A GB9597/41 A GB 9597/41A GB 959741 A GB959741 A GB 959741A GB 552371 A GB552371 A GB 552371A
Authority
GB
United Kingdom
Prior art keywords
optical
relating
lens
tube
lenses
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
GB9597/41A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9597/41A priority Critical patent/GB552371A/en
Publication of GB552371A publication Critical patent/GB552371A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens

Abstract

552,371. Optical-projection apparatus; lenses. COTTON, A. E. July 27, 1942, No. 9597/41. [Class 97 (i)] The projection lens of an optical lantern comprises two elements fixedly mounted at the ends of a tube and an intermediat element axially slidable in the tube. As shown, a compound intermediate lens 25 is mounted on a slide 30 movable by a rack 31 and pinion 32. The diameter of the lens 25 may be substantially smaller than that of the end lenses.
GB9597/41A 1942-07-27 1942-07-27 Improvements in or relating to optical lanterns Expired GB552371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9597/41A GB552371A (en) 1942-07-27 1942-07-27 Improvements in or relating to optical lanterns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9597/41A GB552371A (en) 1942-07-27 1942-07-27 Improvements in or relating to optical lanterns

Publications (1)

Publication Number Publication Date
GB552371A true GB552371A (en) 1943-04-05

Family

ID=9875048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9597/41A Expired GB552371A (en) 1942-07-27 1942-07-27 Improvements in or relating to optical lanterns

Country Status (1)

Country Link
GB (1) GB552371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262358A (en) * 1961-11-29 1966-07-26 Kirkeby Natus Corp Focusing apparatus for a motion picture projector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262358A (en) * 1961-11-29 1966-07-26 Kirkeby Natus Corp Focusing apparatus for a motion picture projector

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