Title:
【発明の名称】偏光ガラスの製造方法
Document Type and Number:
Japanese Patent JP2001501163
Kind Code:
A
Abstract:
A method of producing a polarizing glass article that exhibits a broad band of high contrast polarizing properties in the infrared region of the radiation spectrum, that is phase-separated or exhibits photochromic properties based on silver, copper, or copper-cadmium halide crystals or a combination thereof precipitated in the glass and having a size in the range of 200-5000 Angströms, and that has a surface layer containing elongated silver, copper, or copper cadmium metal particles, or a mixture of same, the method comprising the step of thermally forming and precipitating large halide crystals by subjecting the glass article to a time-temperature cycle in which the temperature is at least 75 DEG C above the glass softening point. The figure is a graphical representation of stress levels in psi versus center wavelengths (CWLs) in nm, where center wavelength is defined as the center of a given range of polarizing capability. Specifically, the stess levels required to achieve a given center wavelength is compared for two heat treatment cycles. The upper line (A) represents data for the standard heat treatment of polarizing glasses; 710 DEG C for 4 hours. Line (B) represents data for the new high temperature heat treatment of 750 DEG C for 8 hours.
Inventors:
Grossman, David G
Vendeglift, Lisa Earl
Whitbread, George N. Third
Williams, Joseph M
Vendeglift, Lisa Earl
Whitbread, George N. Third
Williams, Joseph M
Application Number:
JP51654998A
Publication Date:
January 30, 2001
Filing Date:
September 08, 1997
Export Citation:
Assignee:
Corning Incorporated
International Classes:
G02B5/30; C03B23/00; C03B32/02; C03C3/11; C03C4/00; C03C4/06; C03C10/04; C03C14/00; C03C15/00; C03C23/00; G02B1/00; (IPC1-7): C03C10/04; C03C3/11; C03C4/00; G02B1/00; G02B5/30
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)