Abstract
A new, to the best of our knowledge, optical configuration for digital holographic
profilometry for surface profile measurement of large-depth objects is
proposed. Two multi-reflection mirrors were employed to extend the
maximum axial measurable range by a factor of 2 without any
degradation of the spatial resolution. By adjusting the distance and
the position of the two multi-reflection reference mirrors, the system
can be made more flexible for measuring different parts of the object.
In addition to the axial extension, the two-mirror system also
increases the visibility of the interference fringes so that the
object profile can be measured with high accuracy.
Funder
National Foundation for Science and Technology Development
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering