Title:
REFLECTION PREVENTIVE MATERIAL AND OPTICAL MEMBER
Document Type and Number:
Japanese Patent JP3836214
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily provide the reflection preventive material which has low reflection factor characteristics over a wide range of visible light and superior practicability at a low cost.
SOLUTION: On at least one surface of a transparent base material, a reflection preventive layer 2 is formed by laminating metal oxides which are different in refractive index alternately in order and the high-refractive-index layers 2a and low-refractive-index layers 2b of the reflection preventive layer 2 are formed of the same metal oxides respectively; and the refractive indexes of the high-refractive-index layers 2a are 1.9 to 2.5 and higher in order as the high-refractive-index layers 2a are closer to the transparent base material 1 while the refractive indexes of the low-refractive-index layers 2b are 1.3 to 1.5 and higher in order as the high-refractive-index layers 2a are closer to the transparent base material 1.
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Inventors:
Takahiro Harada
Haruo Uyama
Haruo Uyama
Application Number:
JP12126097A
Publication Date:
October 25, 2006
Filing Date:
May 12, 1997
Export Citation:
Assignee:
Toppan Printing Co., Ltd.
International Classes:
B32B7/02; B32B9/00; G02B1/04; G02B1/11; G02B1/115; G02B1/14; G02B1/16; G02B1/18; (IPC1-7): G02B1/11; B32B7/02; B32B9/00; G02B1/04
Domestic Patent References:
| JP5173216A | ||||
| JP6381404A | ||||
| JP961604A | ||||
| JP6130204A |