| 摘要 |
PROBLEM TO BE SOLVED: To provide a survey system capable of suitably obtaining a measurement value even when an incident angle of range-finding light (visible infrared light) is small or a surface of a measured target is wet. SOLUTION: In the survey system 1 equipped with a non-prism type light-wave range finder 4 for measuring a distance to the measured target 2 by reflection light L2 by irradiating the range-finding light L1 to the measured target 2, a reflection sheet 3 to which the range-finding light L1 is irradiated is provided on the measured target 2. In a surface of the reflection sheet 3, lightness index L* in the L*a*b* color system is 65 or more, and the product of two psychometric chroma coordinates a* and b* is a positive number. COPYRIGHT: (C)2009,JPO&INPIT
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