Compositions – Light transmission modifying compositions – Inorganic crystalline solid
Patent
1994-06-01
1995-06-20
Tucker, Philip
Compositions
Light transmission modifying compositions
Inorganic crystalline solid
252587, 423583, 423593, 423594, 423598, 423610, 423617, 423632, 385141, G02B 520, F21V 904, C01B 1504
Patent
active
054263107
ABSTRACT:
A heat treatment method heats an oxide optical crystal in an oxygen atmosphere containing ozone to improve the light absorption characteristics of the oxide optical crystal so that the light absorption of the oxide optical crystal with light in wavelength bands other than light in wavelength bands with which the oxide optical crystal exerts the intrinsic absorption is reduced to the least possible extent. Guided-optical-wave propagation devices and optical devices, such as optical isolators, optical recording media and second harmonic generators, employing the oxide optical crystal having these improved absorption characteristics, operate at a high efficiency.
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Isobe Chiharu
Saitoh Masaki
Tamada Hitoshi
Sony Corporation
Tucker Philip
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