GB1041118A - Prismatic lens - Google Patents

Prismatic lens

Info

Publication number
GB1041118A
GB1041118A GB2042064A GB2042064A GB1041118A GB 1041118 A GB1041118 A GB 1041118A GB 2042064 A GB2042064 A GB 2042064A GB 2042064 A GB2042064 A GB 2042064A GB 1041118 A GB1041118 A GB 1041118A
Authority
GB
United Kingdom
Prior art keywords
lens
prisms
light
axis
rays
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
GB2042064A
Inventor
Peter Henry Collins
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2042064A priority Critical patent/GB1041118A/en
Priority to NL6506219A priority patent/NL6506219A/xx
Publication of GB1041118A publication Critical patent/GB1041118A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

1,041,118. Optical apparatus. IMPERIAL CHEMICAL INDUSTRIES Ltd. May 13, 1965 [May 15, 1964], No. 20420/64. Heading G2J. A prismatic lens has one flat face 14 and one formed with prisms arranged in the form of concentric circles or a continuous spiral the outer prisms at least being so arranged that light, such as 8, from a source on the axis of the lens is totally internally reflected and emerges parallel to the axis so that the lens has a much shorter focal length than prismatic lenses using only the refractive properties, of the prisms. Each prism face 9 is normal to rays, such as 8, from the light source and of such length X that the light rays are cut off by the next innermost prism. Constructional data are provided for a lens having inner refracting prisms and outer reflecting ones.
GB2042064A 1964-05-15 1964-05-15 Prismatic lens Expired GB1041118A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2042064A GB1041118A (en) 1964-05-15 1964-05-15 Prismatic lens
NL6506219A NL6506219A (en) 1964-05-15 1965-05-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2042064A GB1041118A (en) 1964-05-15 1964-05-15 Prismatic lens

Publications (1)

Publication Number Publication Date
GB1041118A true GB1041118A (en) 1966-09-01

Family

ID=10145670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2042064A Expired GB1041118A (en) 1964-05-15 1964-05-15 Prismatic lens

Country Status (2)

Country Link
GB (1) GB1041118A (en)
NL (1) NL6506219A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1324113A1 (en) * 2000-09-29 2003-07-02 Mitsubishi Denki Kabushiki Kaisha Fresnel lens, screen, image display device, lens mold manufacturing method, and lens manufacturing method
WO2011141616A1 (en) * 2010-05-12 2011-11-17 Qvalo Oy A light transformer and a luminaire
WO2015044060A1 (en) * 2013-09-29 2015-04-02 Koninklijke Philips N.V. Collimator, lighting device and luminaire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1324113A1 (en) * 2000-09-29 2003-07-02 Mitsubishi Denki Kabushiki Kaisha Fresnel lens, screen, image display device, lens mold manufacturing method, and lens manufacturing method
EP1324113A4 (en) * 2000-09-29 2007-03-21 Mitsubishi Electric Corp Fresnel lens, screen, image display device, lens mold manufacturing method, and lens manufacturing method
WO2011141616A1 (en) * 2010-05-12 2011-11-17 Qvalo Oy A light transformer and a luminaire
WO2015044060A1 (en) * 2013-09-29 2015-04-02 Koninklijke Philips N.V. Collimator, lighting device and luminaire

Also Published As

Publication number Publication date
NL6506219A (en) 1965-11-16

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