JPS55136145A - Optical glass for optical path - Google Patents

Optical glass for optical path

Info

Publication number
JPS55136145A
JPS55136145A JP4292179A JP4292179A JPS55136145A JP S55136145 A JPS55136145 A JP S55136145A JP 4292179 A JP4292179 A JP 4292179A JP 4292179 A JP4292179 A JP 4292179A JP S55136145 A JPS55136145 A JP S55136145A
Authority
JP
Japan
Prior art keywords
glass
optical
cao
zno
tio
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
JP4292179A
Other languages
Japanese (ja)
Inventor
Shinobu Tokunaga
Yuichi Shiina
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.)
Sumita Optical Glass Inc
Original Assignee
Sumita Optical Glass Inc
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 Sumita Optical Glass Inc filed Critical Sumita Optical Glass Inc
Priority to JP4292179A priority Critical patent/JPS55136145A/en
Publication of JPS55136145A publication Critical patent/JPS55136145A/en
Priority to US06/208,481 priority patent/US4297141A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To provide the title glass consisting mainly of SiO2, TiO2, CaO, ZnO and R2O of each specified content, having a refractive index of 1.55 or more, an Abbe's no. of 48 or more, a specific gravity of 2.90 or less and superior chemical durability, and capable of removing ultraviolet rays.
CONSTITUTION: This optical glass for an optical path has a compsn. consisting of, by wt., SiO2 55W65%, B2O3 0W10%, TiO2 1W5%, CaO 5W20%, ZnO 3W20%, Al2O3 0W4%, one or more kinds of R2O (R2O is Li2O, Na2O and K2O), ZrO2 0W5% and As2O3 0W1%. In this invention about 5wt% of less of MgO, SrO, BaO, etc. may be contained in the glass compsn. in view of circumstances in glass production.
COPYRIGHT: (C)1980,JPO&Japio
JP4292179A 1978-09-05 1979-04-09 Optical glass for optical path Pending JPS55136145A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4292179A JPS55136145A (en) 1979-04-09 1979-04-09 Optical glass for optical path
US06/208,481 US4297141A (en) 1978-09-05 1980-11-19 Optical glass for optical paths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4292179A JPS55136145A (en) 1979-04-09 1979-04-09 Optical glass for optical path

Publications (1)

Publication Number Publication Date
JPS55136145A true JPS55136145A (en) 1980-10-23

Family

ID=12649479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4292179A Pending JPS55136145A (en) 1978-09-05 1979-04-09 Optical glass for optical path

Country Status (1)

Country Link
JP (1) JPS55136145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02120247A (en) * 1988-10-28 1990-05-08 Shin Etsu Chem Co Ltd Silica-titania glass and method producing the same
JPWO2018154960A1 (en) * 2017-02-21 2020-03-05 株式会社オハラ Optical glass, preform material and optical element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02120247A (en) * 1988-10-28 1990-05-08 Shin Etsu Chem Co Ltd Silica-titania glass and method producing the same
JPWO2018154960A1 (en) * 2017-02-21 2020-03-05 株式会社オハラ Optical glass, preform material and optical element

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