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Optical glass

An optical glass, glass technology, applied in the directions of optics, optical components, light guides, etc., can solve problems such as the reduction of glass transmittance, and achieve the effect of good devitrification resistance and UV resistance.

Active Publication Date: 2011-09-28
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When irradiated with high-output light or ultraviolet light for a long time, the glass is colored, and as a result, the transmittance of the glass decreases

Method used

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  • Optical glass
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  • Optical glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Hereinafter, the present invention will be described in detail based on examples.

[0067] Table 1 shows the Examples (Sample Nos. 1 to 6) of the present invention, and Table 2 shows a Comparative Example (Sample No. 7) of the present invention.

[0068] 〔Table 1)

[0069]

Example

No.1

No.2

No.3

No.4

No.5

No.6

Glass composition (mass %)

SiO 2

Al 2 O 3

B 2 O 3

MgO

BaO

ZnO

Li 2 O

Na 2 O

K 2 O

SnO 2

Cl 2

75.3

2.0

15.2

-

1.2

-

-

3.6

2.5

0.2

-

76.8

3.7

12.7

0.5

-

1.0

-

4.4

0.7

0.2

-

77.2

2.7

13.7

-

0.5

-

0.5

1.9

3.3

0.1

0.1

77.5

1.5

16.7

-

-

-

-

1.0

3.1

0.2

-

79.2

2.5

13.4

-

-

-

-

2.9

1.6

0.4

-

80.2

2.2

12.1

-

-

...

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Abstract

The present invention provides a glass having a refractive index and a coefficient of thermal expansion close to those of quartz glass and having anti-devitrification properties good enough to avoid the development of defects such as devitrification on the surface of the glass upon wire drawing or re-hot molding, more specifically an optical glass for use in optical communication device, particularly an optical glass for a stub. The optical glass is characterized by comprising a borosilicate glass having a refractive index of 1.44 to 1.46, a coefficient of thermal expansion of 10 to 50*10<-7> / DEG, and a liquid phase viscosity of not less than 10<5.5> dPas.

Description

technical field [0001] The present invention relates to an optical glass used in an optical device, in particular, to an optical glass used in an optical communication device such as an optical socket. In particular, the present invention relates to optical glass for use in ferrules. Background technique [0002] At present, ferrules (also called glass rods) and the like are used in optical communication devices. The ferrule or the like is provided on the optical axis of the light source emitted from the optical fiber for the purpose of imparting functions such as coupling, demultiplexing, and branching of light, and is attached to an optical communication device such as an optical socket. [0003] For example, Patent Document 1 described below discloses that a ferrule is inserted into a base end portion of an inner hole formed in a semiconductor module body, and a front end face of the ferrule and a plug ferrule inserted into the front end side of the inner hole are formed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/093C03C3/091C03C3/11G02B6/36
CPCC03C3/11G02B6/3846C03C3/093C03C3/091
Inventor 藤田俊辅籔内浩一
Owner NIPPON ELECTRIC GLASS CO LTD