JPS55138708A - Optical lens - Google Patents

Optical lens

Info

Publication number
JPS55138708A
JPS55138708A JP4674379A JP4674379A JPS55138708A JP S55138708 A JPS55138708 A JP S55138708A JP 4674379 A JP4674379 A JP 4674379A JP 4674379 A JP4674379 A JP 4674379A JP S55138708 A JPS55138708 A JP S55138708A
Authority
JP
Japan
Prior art keywords
faces
glass rods
spherical
opposing
flat
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.)
Pending
Application number
JP4674379A
Other languages
Japanese (ja)
Inventor
Kunio Hashimoto
Kiyoshi Nosu
Kenji Aoshima
Tomoyuki Ito
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.)
OUYOU KOUDEN KENKIYUUSHITSU KK
OYO KODEN KENKIYUUSHITSU KK
Nippon Telegraph and Telephone Corp
Original Assignee
OUYOU KOUDEN KENKIYUUSHITSU KK
OYO KODEN KENKIYUUSHITSU KK
Nippon Telegraph and Telephone Corp
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 OUYOU KOUDEN KENKIYUUSHITSU KK, OYO KODEN KENKIYUUSHITSU KK, Nippon Telegraph and Telephone Corp filed Critical OUYOU KOUDEN KENKIYUUSHITSU KK
Priority to JP4674379A priority Critical patent/JPS55138708A/en
Publication of JPS55138708A publication Critical patent/JPS55138708A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE: To improve the coupling efficiency of fibers and readily vary the rear focal length by opposing the two glass rods which are flat at one end face in such a manner that the flat faces become mutually on the outer side.
CONSTITUTION: Circular cylindrical glass rods 3, 4 which have a flat surface at one faces 3', 4' and whose other end faces 3", 4" are made spherical are opposed and these glass rods 3, 4 are so disposed that their optical axes align. Such constitution enables the effect as a condenser lens to be provided by the opposing two spherical faces 3", 4" if the refractive indices of the glass rods 3, 4 are let n. A concave lens 5 has a value of refractive index 1/n and has the operation equivalent to that of one convex lens and the points that it differs from one convex lens include flatness of both end faces, no relation to the length of glass rods, feasibility of changing rear focus fb value by changing the spacing between the opposing spherical faces, ease of supporting, arbitrary and easy workability of outside diameter and curvature spherical faces because material is ordinary glass, hence low cost.
COPYRIGHT: (C)1980,JPO&Japio
JP4674379A 1979-04-18 1979-04-18 Optical lens Pending JPS55138708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4674379A JPS55138708A (en) 1979-04-18 1979-04-18 Optical lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4674379A JPS55138708A (en) 1979-04-18 1979-04-18 Optical lens

Publications (1)

Publication Number Publication Date
JPS55138708A true JPS55138708A (en) 1980-10-29

Family

ID=12755806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4674379A Pending JPS55138708A (en) 1979-04-18 1979-04-18 Optical lens

Country Status (1)

Country Link
JP (1) JPS55138708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591018U (en) * 1982-06-25 1984-01-06 工業技術院長 cylindrical lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271250A (en) * 1975-12-09 1977-06-14 Philips Nv Optical coupler
JPS549953A (en) * 1977-06-24 1979-01-25 Fujitsu Ltd Optical matching method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271250A (en) * 1975-12-09 1977-06-14 Philips Nv Optical coupler
JPS549953A (en) * 1977-06-24 1979-01-25 Fujitsu Ltd Optical matching method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591018U (en) * 1982-06-25 1984-01-06 工業技術院長 cylindrical lens

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