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Title:
SPECTACLES FOR PROTECTING ELECTROMAGNETIC WAVE AND SPECTACLE GLASS
Document Type and Number:
Japanese Patent JPH11281935
Kind Code:
A
Abstract:

To make it possible to protect the eyeballs against the electromagnetic waves radiated from office automation apparatus by providing spectacle glass formed by providing the one surface of a glass material with a transparent conductive film consisting essentially of indium oxide and tin oxide.

The spectacle glass is constituted by laminating a first AR coating layer 2, an ITO film 3 and a second AR coating layer 4 on the surface of the glass material 1. The glass material 1 has a central thickness of 1.5 to 1.7 mm and is worked as a lens at need. The compsn. of the glass body is not particularly limited. The glass body contains rare earth elements (cerium Ce, neodymium Nd, praseodymium Pr). As a result, a deep valley is formed on the upper side of a wavelength 550 nm which is the peak of visual sensitivity in a transmission characteristic and a high-contrast lens having the improved visibility of a visible region is embodied. Since the spectacle glass has electrical conductivity, the direct irradiation of the eyeballs with the electromagnetic waves from the office automation apparatus may be prevented.


Inventors:
TSUTSUMI TAKASHI
Application Number:
JP10415598A
Publication Date:
October 15, 1999
Filing Date:
March 30, 1998
Export Citation:
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Assignee:
OSAKA OPTICAL GLASS
International Classes:
A61N1/16; C23C14/08; G02B5/28; G02C7/02; (IPC1-7): G02C7/02; A61N1/16; C23C14/08; G02B5/28
Attorney, Agent or Firm:
Mitsuo Fukushima (1 person outside)