GB332134A - Improvements in optical reflectors for signalling and other purposes - Google Patents

Improvements in optical reflectors for signalling and other purposes

Info

Publication number
GB332134A
GB332134A GB2907729A GB2907729A GB332134A GB 332134 A GB332134 A GB 332134A GB 2907729 A GB2907729 A GB 2907729A GB 2907729 A GB2907729 A GB 2907729A GB 332134 A GB332134 A GB 332134A
Authority
GB
United Kingdom
Prior art keywords
base
reflector
light
lenticular
conical
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
GB2907729A
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.)
JAMES WILLIAM PUNTER
Original Assignee
JAMES WILLIAM PUNTER
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 JAMES WILLIAM PUNTER filed Critical JAMES WILLIAM PUNTER
Priority to GB2907729A priority Critical patent/GB332134A/en
Publication of GB332134A publication Critical patent/GB332134A/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
    • G02B5/12—Reflex reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Catching Or Destruction (AREA)

Abstract

332,134. Punter, J. W., and Avril, G. Sept. 25, 1929. Reflectors of white or coloured glass or other transparent material are of conical form, the generating lines being inclined substantially at 45‹ to the axis, and the base comprising a lens, so that rays incident on the lenticular surface are reflected twice before emerging from that surface. The lenticular form causes a proportion of the light to be dispersed or diffused. In a modified form the reflector comprises a central cone, Fig. 4, surrounded by one or more circular rings f having a cross-section similar to that of the central cone. In another form, Fig. 7, the base of the reflector is moved as shown, and is similarly provided with concentrically arranged prismatic surfaces, the incident rays being reflected and refracted to form a parallel or convergent beam. The base of the conical reflector may be recessed in steps to reduce the absorption of light and the weight.
GB2907729A 1929-09-25 1929-09-25 Improvements in optical reflectors for signalling and other purposes Expired GB332134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2907729A GB332134A (en) 1929-09-25 1929-09-25 Improvements in optical reflectors for signalling and other purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2907729A GB332134A (en) 1929-09-25 1929-09-25 Improvements in optical reflectors for signalling and other purposes

Publications (1)

Publication Number Publication Date
GB332134A true GB332134A (en) 1930-07-17

Family

ID=10285786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2907729A Expired GB332134A (en) 1929-09-25 1929-09-25 Improvements in optical reflectors for signalling and other purposes

Country Status (1)

Country Link
GB (1) GB332134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498426A (en) * 1947-03-24 1950-02-21 Roy W Johnson Catadioptric reflex reflecting lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498426A (en) * 1947-03-24 1950-02-21 Roy W Johnson Catadioptric reflex reflecting lens

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