发明名称 |
LIGHT PEN |
摘要 |
<p>LIGHT PEN A light pen for detecting radiation from a display screen has a tubular body with a conical tip. The tip which fastens into the pen body includes an opaque bush which has a bore having a precisely determined diameter for transmitting light from an aperture in the tip to a light sensing device mounted in the body of the pen. The bore or interior surface of the bush has a surface formed to eliminate internal reflection.</p> |
申请公布号 |
CA1155984(A) |
申请公布日期 |
1983.10.25 |
申请号 |
CA19800357088 |
申请日期 |
1980.07.25 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
WARWICK, WILLIAM A. |
分类号 |
G06K7/10;G06F3/033;G06F3/037;G06K9/24;(IPC1-7):G09G1/00;G09G3/00 |
主分类号 |
G06K7/10 |
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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