Patent ID: 9121705
Filing Date: 2015-09-01
Classification: G01B,G01C

Abstract:
1. System for measuring thickness and lateral position of a transparent object comprising: a camera including a sensor or for receiving light the camera including an objective lens for focusing on an object plane and having an optical axis and a field of view; a source of light; a surface having variations in reflected or transmitted light intensity spaced apart from the objective lens and illuminated by the source of light and disposed at an angle with respect to the optical axis of the objection lens; whereby a transparent object disposed fully or partially between the objective lens and the surface will shift the position of the object plane, the shift in object plane being proportional to the thickness of the object, and the transparent object, when partially inserted between the object lens and the surface, will focus a fraction of the light on a second plane, this fraction of light being proportional to the fraction of the lens field of view occupied by the transparent object and related to lateral position.