Effects of misalignment on real-image holographic measurement

Gary A. Ross; John Watson

doi:10.1117/12.140398

Abstract

The advantages of holography for remote optical inspection and mensuration can be greatly reduced by loss of image quality caused by an unoptimized reconstruction geometry. For underwater holography it is essential that image quality is high to ensure mechanical defects, such as cracks, corrosion, or deformities, can be detected. In practical replay systems, a number of physical constraints limit image resolution to a value significantly lower than that theoretically possible in an ideal system. In most cases, even this limited resolution is unobtainable, due to mismatch of the reconstruction wavefronts caused by imprecise relocation of the hologram and inexact conjugation of the reference beam. It is shown how deviations from the optimum reconstruction geometry affect image resolution, both theoretically and experimentally, for a number of in-air and underwater recording geometries.

Citation Download Citation

Gary A. Ross, Gary A. Ross, John Watson, John Watson, } "Effects of misalignment on real-image holographic measurement", Proc. SPIE 1732, Holographics International '92, (2 March 1993); doi: 10.1117/12.140398; https://doi.org/10.1117/12.140398

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years