Glass composition and method of manufacturing the same, and glass member and image pickup device

Patent metadata

Field	Value
Publication number	US-2017190613-A1
Application number	US-201515316472-A
Country	US
Kind code	A1
Filing date	Jul 22, 2015
Priority date	Jul 29, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

Provided is a glass composition having an infrared absorbing function, water resistance, heat resistance, and a low expansion coefficient, the glass composition including the following components (a) to (c): (a) 0.1 wt % or more to 14.0 wt % or less of an intermediate oxide; (b) 0.1 wt % or more to 14.0 wt % or less of CuO; and (c) 80.0 wt % or more to 99.8 wt % or less of silica, in which a total of a content ratio of the intermediate oxide and a content ratio of the CuO is from 0.2 wt % or more to 20 wt % or less.

First claim

1 . A glass composition, comprising:
(a) 0.1 wt % to 14.0 wt % of an intermediate oxide; (b) 0.1 wt % to 14.0 wt % of CuO; and (c) 80.0 wt % to 99.8 wt % of silica, wherein a total of a content ratio of the intermediate oxide and a content ratio of the CuO is from 0.2 wt % to 20 wt %.

2 . The glass composition according to claim 1 , wherein a content ratio of the silica is 85.0 wt % or more.

3 . The glass composition according to claim 1 , wherein the glass composition satisfies formula (1):
0.2≦ n 1 /n 2 ≦5.0  (1),
where n 1 represents a molar amount of the intermediate oxide, and n 2 represents a molar amount of the CuO.

4 . The glass composition according to claim 1 , wherein the intermediate oxide comprises any one of Al 2 O 3 , TiO 2 , Ga 2 O 3 , and Ta 2 O 5 .

5 . A method of manufacturing the glass composition of claim 1 , the method comprising:
firing porous silica containing CuO and an intermediate oxide at a temperature of 900° C. or more.

6 . A glass member, comprising:
a base material; and a surface layer for covering a surface of the base material, wherein the base material comprises the glass composition of claim 1 , and wherein the surface layer comprises a porous silica film.

7 . An image pickup device, comprising:
the glass composition of claim 1 ; and an image pickup element.

8 . An image pickup device, comprising:
the glass member of claim 6 ; and an image pickup element, wherein the glass member is arranged so that the surface layer is farther from the image pickup element than the base material.

9 . The glass composition according to claim 1 , wherein the intermediate oxide is a metal oxide containing a metal ion having a valence of 3, 4, or 5 in an oxide state and a Shannon's ionic radius of 0.7 Å or less.

10 . The glass composition according to claim 1 , which comprises at least two intermediate oxides.

Assignees

• Canon Kk

Inventors

• Zhang Zuyi
• Kotani Yoshinori
• Koketsu Naoyuki

Classifications

• C03C23/0095 Primary

  Solution impregnating; Solution doping; Molecular stuffing, e.g. of porous glass (in manufacture of preforms C03B37/012) · CPC title

• C03C3/06

  with more than 90% silica by weight, e.g. quartz {(C03C3/045 takes precedence)} · CPC title

• C03C17/02

  with glass (C03C17/34, C03C17/44 take precedence) · CPC title

• C03C3/085

  containing an oxide of a divalent metal · CPC title

• G02B5/226

  Glass filters · CPC title