A measurement method with virtual gray encoding patterns using window's functions
Journal
Proceedings of the Second International Symposium on Instrumentation Science and Technology
Pages
4/575-4/579
Date Issued
2002
Author(s)
Abstract
A gray coding method based on a pair of orthogonal gray pattern has been presented to measure the distance of object. The displacement can be obtained through phase detection technique by using of CCD camera. In this paper, an equivalent gray level pattern with an optical mask has been proposed which is based on a concept of geometrical variety. The precision of displacement measurement can be promoted by a Window's function technique. The experiment result shows the concept is feasible.
Subjects
Computer hardware
Computer software
Diffraction gratings
Masks
Multi-element detectors
Optical mask
Virtual gray encoding
Signal encoding
Type
conference paper