GB336499A - Improvements in or relating to episcopic projection apparatus - Google Patents

Improvements in or relating to episcopic projection apparatus

Info

Publication number
GB336499A
GB336499A GB38253/29A GB3825329A GB336499A GB 336499 A GB336499 A GB 336499A GB 38253/29 A GB38253/29 A GB 38253/29A GB 3825329 A GB3825329 A GB 3825329A GB 336499 A GB336499 A GB 336499A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
relating
reflector
episcopic
side reflectors
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
GB38253/29A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz GmbH
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 Ernst Leitz GmbH filed Critical Ernst Leitz GmbH
Publication of GB336499A publication Critical patent/GB336499A/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
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Abstract

336,499. Leitz, E., [Firm of]. Jan. 31, 1929, [Convention date]. Optical-projection apparatus. - In episcopic projection apparatus, a concave reflector B, a. front reflector C, and two curved side reflectors D, are provided in conjunction with one or more lamps A, to illuminate the field of the object being projected. The curvature of the side reflectors may correspond approximately to that of the reflector C, and their focal length may be from one to one-and-a-half times that of the projection lens F.
GB38253/29A 1929-01-31 1929-12-13 Improvements in or relating to episcopic projection apparatus Expired GB336499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE336499X 1929-01-31

Publications (1)

Publication Number Publication Date
GB336499A true GB336499A (en) 1930-10-16

Family

ID=6220437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38253/29A Expired GB336499A (en) 1929-01-31 1929-12-13 Improvements in or relating to episcopic projection apparatus

Country Status (1)

Country Link
GB (1) GB336499A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225446A (en) * 1988-11-25 1990-05-30 Plus Kk Opaque projector having a mirror on each side of a projection mirror.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225446A (en) * 1988-11-25 1990-05-30 Plus Kk Opaque projector having a mirror on each side of a projection mirror.
GB2225446B (en) * 1988-11-25 1993-02-03 Plus Kk Opaque projector

Similar Documents

Publication Publication Date Title
GB336499A (en) Improvements in or relating to episcopic projection apparatus
USD83568S (en) Herman nettwirth
ES128768A1 (en) Improvements in headlights equipped with lens systems or reflectors.
FR748391A (en) Light reflector
CA361304A (en) Lamp reflector and lens
FR709027A (en) Improvements in the projection of light
AU100177B2 (en) Improvements in lamp reflectors and lenses therefor
DK45642C (en) On the back mirrored reflector for artificial light sources.
CA278622A (en) Light reflector
FR719041A (en) Tin-plated reflector on the back for artificial light sources
ES114158A1 (en) Improvements in the headlights or light projectors.
AU41836A (en) Improvements in lamp reflectors and lenses therefor
FR748879A (en) Light reflector
AU2472430A (en) Improvements in photographic flashlight cartridge
GB225282A (en) Improvements in light projectors
FR722696A (en) Diffusing reflector light fixture
CA319981A (en) Lamp lens
FR778156A (en) Light bollard with reflectors
GB282282A (en) Improvements in lenses for signalling lamps, searchlights and like purposes
AT134366B (en) Reflector lamp with adjustable electric light bulb in the reflector neck.
CA259015A (en) Light diffusing lense
GB304089A (en) Apparatus for diascopic and episcopic projection
GB426306A (en) Improvements in reflecting lenses
CA296905A (en) Light reflecting unit
CA326891A (en) Headlight reflector