发明名称 |
Water drop detector on transparent substrate |
摘要 |
A windshield (transparent substrate) 1 having the function of detecting the presence of water drops W upon one side surface of the windshield depending upon variations in an amount of reflected light, comprising a rain sensor provided on the other side surface of the windshield, which further comprises: light emitting means 6 for guiding light into the windshield 1; light receiving means 7 for detecting the light which is reflected within the windshield 1; and, light shielding members 10 and 11 provided on the other side surface of the windshield 1 opposing the light emitting means 6 and the light receiving means 7, respectively; wherein the light shielding member 10 shields the light emitted from the light emitting means 6 at an incident angle less than a critical angle at which total internal reflection occurs at a boundary surface between air and the windshield 1, while the other shielding member 11 shields outside ambient light incident upon the light receiving means 7.
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申请公布号 |
US5998782(A) |
申请公布日期 |
1999.12.07 |
申请号 |
US19980191188 |
申请日期 |
1998.11.13 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
KOYAMA, TADASHI;TSUNETOMO, KEIJI;TANAKA, SHUHEI;IMANISHI, HIDEKI |
分类号 |
G01N21/47;B60S1/08;G01N21/17;(IPC1-7):G02B6/42 |
主分类号 |
G01N21/47 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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