OPTICAL TRIANGULATION-TYPE DISPLACEMENT SENSOR

摘要

PURPOSE: To suppress an error in measuring a detection object having a ground face on its surface approximately to a degree of a detection object having a diffused face on its surface with little change to a conventional circuitry and external size. ;CONSTITUTION: As a lens for condensing reflected light from a ground face 6, a light receiving lens 4 having such a large diameter that an apparent angle when viewing a detection object 3 from the lens is ±45° or larger is used.;COPYRIGHT: (C)1996,JPO