Patent ID: 9714824
Date: 2017-07-25
CPC Classifications: G01B,G01M

Claim:
1. A lens shape measurement device, comprising: a supporting unit that supports a spectacle lens edged based on edging data; a laser displacement meter that measures a measurement position of a measurement object utilizing a variation of an observation point of a reflected light which varies depending on the measurement position of the measurement object, when the measurement position of an object surface is irradiated with laser beams, the laser displacement meter being translatable along X and Z axes; a relative position altering unit that alters a relative position between the spectacle lens supported by the supporting unit and the laser displacement meter; and a drive controller, wherein the drive controller controls the relative position altering unit based on the edging data at a time of measuring an edging shape of the spectacle lens, the measurement device obtaining, by virtue of the controller controlling the drive of the relative position altering unit based on the edging data, a mirror reflection having a predetermined angle to a normal line passing through a measurement object, for each measurement object of a plurality of measurement objects set on an edge surface of the spectacle lens and the angle is (1) the same incident angle for each of the plurality of measurement objects, (2) the same reflection angle for each of the plurality of measurement objects, or (3) the same incident angle and the same reflection angle for each of the plurality of measurement objects.