Measurement of moderate wedge angles of optical windows using a wedge shear plate

Y. Pavan Kumar; Sanjib Chatterjee

doi:10.1117/1.3454380

1 June 2010 Measurement of moderate wedge angles of optical windows using a wedge shear plate

Y. Pavan Kumar, Sanjib Chatterjee

Author Affiliations +

Optical Engineering, Vol. 49, Issue 6, 063603 (June 2010). https://doi.org/10.1117/1.3454380

Abstract

We present what we believe to be a new technique for the measurement of moderate wedge angles of optical wedge plates using a wedge shear plate (WSP). Using the technique, a wedge angle of up to 5 deg can be measured. The WSP, oriented at an angle to the incident collimated beam, produces shear fringes. The shear fringes are parallel-shifted by rotating a test wedge plate (TWP), in its plane, placed at the input beam of the WSP. The fringe shift is due to the variation of the optical path difference between the interfering beams reflected from the front and back surfaces of the WSP, brought about by the change in the angle of incidence on the WSP due to the rotation of the TWP. The maximum number of fringes shifted as the wedge direction of the TWP (initially aligned perpendicular to the wedge direction of the WSP) is rotated by 180 deg is used for the measurement of the wedge angle of the TWP. Results obtained for a 59.0-arcmin wedge plate with a measurement uncertainty of ±4.68 arcsec are presented. The technique is very simple, and the results are not affected by external vibrations.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Y. Pavan Kumar and Sanjib Chatterjee "Measurement of moderate wedge angles of optical windows using a wedge shear plate," Optical Engineering 49(6), 063603 (1 June 2010). https://doi.org/10.1117/1.3454380

Published: 1 June 2010

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available