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

Determination of the refractive index of a lens using the Murty shearing interferometer

Not Accessible

Your library or personal account may give you access

Abstract

An innovative nondestructive technique for mesuring the refractive index of a simple lens is described. The proposed method is superior to existing ones because the focusing error and the spherical aberrations are reduced. Apart from this, the strength parameters (i.e., r1 and r2) of a lens are not required at all since the derived lens-index formula is independent of the lens's physical parameters. The shearing interferometric technique is a sensitive aid for detecting the focal plane of the test lens. A modified criterion for determining the focal length has been used. In this case two miscible liquids or compounds are not necessary. The well-known liquid immersion method is the particular case of this technique. The Murty shearing interferometer has been used as an optical device to observe the defocusing defect in the form of fringes. The amount of defocusing is easily calculated. An equation for this error has been theoretically deduced and experimentally verified. The technique described is quick to perform and easy in handling. The various effects due to the lens's aperture and aberrations, thickness of the glass cell, liquid column, etc. are also discussed. For N liquids, there are N (N − 1)/2 ways of calculating the lens′s index. Owing to its nature this is termed the nondestructive nonmiscible-liquid immersion technique for index measurement of a lens.

© 1983 Optical Society of America

Full Article  |  PDF Article
More Like This
Use of a grating in a coherent optical-processing configuration for evaluating the refractive index of a lens

R. S. Kasana, S. Boseck, and K.-J. Rosenbruch
Appl. Opt. 23(5) 757-761 (1984)

Determination of refractive indices of biconvex lenses by use of a Michelson interferometer

Vani K. Chhaniwal, Arun Anand, and C. S. Narayanamurthy
Appl. Opt. 45(17) 3985-3990 (2006)

Laser differential confocal lens refractive index measurement

Weiqian Zhao, Yun Wang, Lirong Qiu, and Haorong Guo
Appl. Opt. 50(24) 4769-4778 (2011)

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 (4)

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 (5)

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 (54)

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