Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Low-coherence interferometer system for the simultaneous measurement of refractive index and thickness

Not Accessible

Your library or personal account may give you access

Abstract

We have developed a low-coherence interferometer system used for the simultaneous measurement of refractive index n and thickness t of transparent plates. Both the phase index n p and group index n g can be determined automatically in a wide thickness range of from 10 µm to a few millimeters. Two unique techniques are presented to measure n p, n g, and t simultaneously. One allows us to determine n p, n g, and t accurately by using a special sample holder, in which the measurement accuracy is 0.3% for the thickness t above 0.1 mm. In the other technique the chromatic dispersion δn of index is approximately expressed as a function of (n p - 1) on the basis of measured values of n p and n g for a variety of materials, and then the simultaneous measurement is performed with a normal sample holder. In addition, a measurement accuracy of less than 1% is achieved even when the sample is as thin as 20 µm. The measurement time is also 3 min or more.

© 2002 Optical Society of America

Full Article  |  PDF Article
More Like This
Simultaneous measurement of the phase and group indices and the thickness of transparent plates by low-coherence interferometry

Masamitsu Haruna, Masato Ohmi, Teruki Mitsuyama, Hideyuki Tajiri, Hideki Maruyama, and Masahiro Hashimoto
Opt. Lett. 23(12) 966-968 (1998)

Simultaneous measurement of refractive index and thickness by combining low-coherence interferometry and confocal optics

Seokhan Kim, Jihoon Na, Myoung Jin Kim, and Byeong Ha Lee
Opt. Express 16(8) 5516-5526 (2008)

Dispersion-insensitive measurement of thickness and group refractive index by low-coherence interferometry

Dominic F. Murphy and Dónal A. Flavin
Appl. Opt. 39(25) 4607-4615 (2000)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (12)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved