GB842456A - Improvements in or relating to viewing devices for optical instruments - Google Patents

Improvements in or relating to viewing devices for optical instruments

Info

Publication number
GB842456A
GB842456A GB3874856A GB3874856A GB842456A GB 842456 A GB842456 A GB 842456A GB 3874856 A GB3874856 A GB 3874856A GB 3874856 A GB3874856 A GB 3874856A GB 842456 A GB842456 A GB 842456A
Authority
GB
United Kingdom
Prior art keywords
illuminated
image
eye
tube
viewing
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
GB3874856A
Inventor
Erich Kosche
Paul Lindner
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.)
DEUTSCHER DEMOKRATISCHER RUNDF
Original Assignee
DEUTSCHER DEMOKRATISCHER RUNDF
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 DEUTSCHER DEMOKRATISCHER RUNDF filed Critical DEUTSCHER DEMOKRATISCHER RUNDF
Priority to GB3874856A priority Critical patent/GB842456A/en
Publication of GB842456A publication Critical patent/GB842456A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders

Abstract

842,456. Eyepieces. DEUTSCHER DEMOKRATISCHER RUNDFUNK BETRIEBSLABORATORIUM FUR RUNDFUNK UND FERNSEHEN. Dec. 19, 1956, No. 38748/56. Class 97(1) A viewing device for optical instruments such as microscopes, telescopes or viewfinders comprises an eyepiece and a housing or viewing tube the inner surface of which is adapted to be illuminated by incident light from inside the tube or by transmitted light from outside so that the illuminated surfaces appear to the eye with a brightness equal to the mean brightness of the image produced by the instrument, the said image being surrounded by an illuminated field corresponding in size to the visual angle of the human eye. As shown the image to be viewed is projected by a lens I on to a field lens 2 and is viewed through an eyepiece 3. The viewing tube 5 is of spherical form and is made of semitransparent glass or plastic. It may, however, be opaque. Lamps 7 illuminate the inner surface of the sphere so that the eye 4 sees the image on the lens 2 surrounded by an equally illuminated area. The non-viewing eye may be provided with a similarly illuminated chamber. The lamps 7 may be omitted, the tube 5 being translucent and illuminated externally. The illuminations may be controlled photo-electrically.
GB3874856A 1956-12-19 1956-12-19 Improvements in or relating to viewing devices for optical instruments Expired GB842456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3874856A GB842456A (en) 1956-12-19 1956-12-19 Improvements in or relating to viewing devices for optical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3874856A GB842456A (en) 1956-12-19 1956-12-19 Improvements in or relating to viewing devices for optical instruments

Publications (1)

Publication Number Publication Date
GB842456A true GB842456A (en) 1960-07-27

Family

ID=10405454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3874856A Expired GB842456A (en) 1956-12-19 1956-12-19 Improvements in or relating to viewing devices for optical instruments

Country Status (1)

Country Link
GB (1) GB842456A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729648A (en) * 1986-11-10 1988-03-08 Armstrong Jeffrey A Partial eyeshield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729648A (en) * 1986-11-10 1988-03-08 Armstrong Jeffrey A Partial eyeshield

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