【発明の名称】光フィルター用ガラスセラミックス及び光フィルター

Title:

【発明の名称】光フィルター用ガラスセラミックス及び光フィルター

Document Type and Number:

Japanese Patent JP3107304

Kind Code:

B1

Abstract:

Glass-ceramics for a light filter capable of preventing variation of refractive index in a band-pass filter have a coefficient of thermal expansion within a range from 95 x 10<-7>/ DEG C to 140 x 10<-7>/ DEG C within a temperature range from -20 DEG C to +70 DEG C and, preferably, Young's modulus of 85GPa and bending strength of 10kg/mm<2>, and light transmittance for plate thickness of 10mm of 60% or over within a wavelength range from 950nm to 1600nm. Predominant crystal phases of these glass-ceramics should preferably be (a) lithium disilicate and (b) one selected from the group consisting of alpha -quartz, alpha -quartz solid solution, alpha -cristobalite and alpha -cristobalite solid solution.

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Inventors:

Naoyuki Goto
Tamako Kataoka
Donald g pollensky

Application Number:

JP22694799A

Publication Date:

November 06, 2000

Filing Date:

August 10, 1999

Export Citation:

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Assignee:

OHARA CORPORATION

International Classes:

C03C10/00; C03C10/04; C03C10/12; C03C10/14; G02B5/20; G02B5/22; G02B5/28; (IPC1-7): C03C10/14; G02B5/28

Domestic Patent References:

JP7198935A

Attorney, Agent or Firm:

Toru Sakamoto (1 person outside)

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