Target device
First Claim
1. A target device for use in connection with a non-prism light wave range finder, comprising a base portion for supporting the device at a measuring position, and at least one reflective surface at a measuring position supported on said base portion for reflecting a measuring light, said reflective surface comprising a mark drawn thereon for identifying the target device and a central line formed to indicate a central portion of said reflective surface, and retroflective sheet having at least one color which is selected to enhance visibility of said central line and/or said mark and wherein said reflective surface has at least one color portion of a low retroreflectivity.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a target device for use in a non-prism light wave range finder. In particular, the invention is concerned with a target device comprising a base portion and at least one reflective surface formed on the base portion, the reflective surface being constituted by a colored retroreflective sheet.
68 Citations
3 Claims
- 1. A target device for use in connection with a non-prism light wave range finder, comprising a base portion for supporting the device at a measuring position, and at least one reflective surface at a measuring position supported on said base portion for reflecting a measuring light, said reflective surface comprising a mark drawn thereon for identifying the target device and a central line formed to indicate a central portion of said reflective surface, and retroflective sheet having at least one color which is selected to enhance visibility of said central line and/or said mark and wherein said reflective surface has at least one color portion of a low retroreflectivity.
Specification
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- Resources
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Current AssigneeKabushiki Kaisha Topcon
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Original AssigneeKabushiki Kaisha Topcon
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InventorsSadachika, Hitoshi, O Tsuka, Hisao, Ohishi, Masahiro
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Primary Examiner(s)Black, Thomas G.
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Assistant Examiner(s)Hughes, Deandra M.
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Application NumberUS09/574,490Time in Patent Office1,348 DaysField of Search359/515, 359/527, 359/529, 359/530, 356/3-1-, 356/9, 356/11, 356/14, 356/152.3, 356/615, 356/620, D10/61, 473/170-196, D22/113US Class Current356/620CPC Class CodesG01C 15/02 Means for marking measuring...G01S 7/481 Constructional features, e....
