GB191105561A - Improvements in Prismatic Lenses. - Google Patents

Improvements in Prismatic Lenses.

Info

Publication number
GB191105561A
GB191105561A GB191105561DA GB191105561A GB 191105561 A GB191105561 A GB 191105561A GB 191105561D A GB191105561D A GB 191105561DA GB 191105561 A GB191105561 A GB 191105561A
Authority
GB
United Kingdom
Prior art keywords
prism
prismatic lenses
angle
lens portion
lens
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
Inventor
Malinda Goldson
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
Application granted granted Critical
Publication of GB191105561A publication Critical patent/GB191105561A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

5561. Goldson, M. March 6. Prisms for glazed gratings.- Relates to the construction and arrangement of prismatic lenses for pavement lights, illuminated box signs, &c. The prismatic lenses are formed with a lens 6 consisting of a central convex portion and an outer annular portion 10, and a prism having a convexly curved face 8 and a reflecting face 5, the lens portion being formed with a screwthread 7 for insertion into screwed holes in the illuminated sign &c. The faces 8 of the prisms are directed towards the sources of light 3 inside the box. The angle of the prism is slightly less than a right-angle, in an example given, the angle of the prism being 86 degrees, and the width of the prism is less than the diameter of the lens portion. The prismatic lenses may be made hollow in one piece and filled with liquid. Fig. 5 shows a modification for use in pavement lights, in which the lens portion is not threaded.
GB191105561D 1911-03-06 1911-03-06 Improvements in Prismatic Lenses. Expired GB191105561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191105561T 1911-03-06

Publications (1)

Publication Number Publication Date
GB191105561A true GB191105561A (en) 1911-07-20

Family

ID=32497320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191105561D Expired GB191105561A (en) 1911-03-06 1911-03-06 Improvements in Prismatic Lenses.

Country Status (1)

Country Link
GB (1) GB191105561A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6330121B1 (en) * 1997-11-17 2001-12-11 Olympus Optical Co., Ltd. Optical prism, display element support and optical assembly using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6330121B1 (en) * 1997-11-17 2001-12-11 Olympus Optical Co., Ltd. Optical prism, display element support and optical assembly using the same
US6829112B2 (en) 1997-11-17 2004-12-07 Olympus Corporation Optical prism, display element support and optical assembly using the same
US7119971B2 (en) 1997-11-17 2006-10-10 Olympus Corporation Optical prism, display element support and optical assembly using the same

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