激光测距仪

http://www.pages.drexel.edu/~kws23/tutorials/sick/sick.html

In ideal conditions, the LMS 200 is capable of measuring out to 80m over a 180° arc. For an object with only 10% reflectivity (such as matt black cardboard), the LMS 200 can measure out to 10m. The sensor is best for indoor use as it can be dazzled by sunlight (causing it to give erroneous readings).