title: Smartphone-based platform optical setup measuring π/256 optical phase difference in an interference process.
abstract: Utilizing the camera of a smartphone and simple laboratory optical components, we demonstrate an optical technique that measures an optical phase difference (OPD) of π/256 in an interference process. We develop a compact optical setup for viewing circular interference fringe patterns through the camera of the smartphone. By introducing OPD between the interfering beams, variation in fringe pattern is recorded using the smartphone camera. We envision that the proposed optical setup could emerge as an ultrasensitive optical tool for measurement of inclination of a given surface.
authors.forename: Iftak
authors.initials: I
authors.lastname: Hussain
authors.forename: Pabitra
authors.initials: P
authors.lastname: Nath