METHOD FOR MANUFACTURING GRADIENT-INDEX OPTICAL ELEMENT HAVING INFRARED ABSORBING ABILITY

Title:

METHOD FOR MANUFACTURING GRADIENT-INDEX OPTICAL ELEMENT HAVING INFRARED ABSORBING ABILITY

Document Type and Number:

WIPO Patent Application WO/2007/018208

Kind Code:

A1

Abstract:

Disclosed is a method for simply manufacturing a gradient-index optical element having infrared absorbing ability wherein a refractive index gradient is easily formed in a desired portion of a glass base having infrared absorbing ability without requiring a specific processing atmosphere and without using a molten salt. Specifically disclosed is a method for manufacturing a gradient-index optical element having infrared absorbing ability, which is characterized in that a paste containing at least one compound selected from the group consisting of lithium compounds, potassium compounds, rubidium compounds, caesium compounds, silver compounds, copper compounds and thallium compounds, an organic resin and an organic solvent is applied onto a glass base containing an alkali metal component and at least one element selected from the group consisting of iron, copper, cobalt and vanadium, and the resulting is heat-treated at a temperature lower than the softening temperature of the glass base. In this connection, when only iron among the group of iron, copper, cobalt and vanadium is contained in the glass base, the ion content is more than 3% by weight in terms of Fe2O3 when the total weight of the glass is taken as 100% by weight.

Inventors:

SUETSUGU TATSUYA (JP)
KIMURA KAZUHISA (JP)
OHTANI TAKESHI (JP)
KAGA NAOKO (JP)
KIKUCHI NAOKI (JP)
YAMASHITA NAOTO (JP)
MORIZANE YUKIKO (JP)
EINISHI TOSHIHIKO (JP)
KADONO KOHEI (JP)

Application Number:

PCT/JP2006/315656

Publication Date:

February 15, 2007

Filing Date:

August 08, 2006

Export Citation:

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Assignee:

ISUZU GLASS CO LTD (JP)
NAT INST OF ADVANCED IND SCIEN (JP)
SUETSUGU TATSUYA (JP)
KIMURA KAZUHISA (JP)
OHTANI TAKESHI (JP)
KAGA NAOKO (JP)
KIKUCHI NAOKI (JP)
YAMASHITA NAOTO (JP)
MORIZANE YUKIKO (JP)
EINISHI TOSHIHIKO (JP)
KADONO KOHEI (JP)

International Classes:

G02B3/00; C03C3/17; C03C3/19; C03C3/21; C03C21/00; G02B1/00; G02B5/22; C03C3/087; C03C3/089; C03C3/247

Foreign References:

JP2001159702A	2001-06-12
JPH11100215A	1999-04-13
JPS58167450A	1983-10-03
JP2001159702A	2001-06-12

Other References: