Affiliation:
1. National Astronomical Research Institute of Thailand (Public Organization)
2. Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation
Abstract
This work presents a portable optical meter for noncontact thickness measurement. The
device shines a focused laser light on a thin and transparent sample,
resulting in an interference between light reflecting from the top and
from the bottom surface, and the interfering pattern is recorded by a
linear sensor array before data analysis with an Arduino
microcontroller. The device produced accurate thickness values from
glass cover slips and transparent plastic sheets within a fraction of
a second per measurement. Additionally, the sample’s refractive index
is not required a priori. Therefore, it
has a high potential to be of use in real-time quality control in
transparent thick-film coating and manufacturing.
Funder
National Astronomical Research Institute of Thailand
Thailand Center of Excellence in Physics
Development and Promotion of Science and Technology Talents Project
Center of Excellence for Trace Analysis and Biosensor
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering