Reflection Of Laser Radiation From Transparent Media (N >1) With A Diffusely Reflecting Substrate

D. C. Look, Jr.; H. F. Nelson

doi:10.1117/12.7973796

1 January 1986 Reflection Of Laser Radiation From Transparent Media (N >1) With A Diffusely Reflecting Substrate

D. C. Look, Jr., H. F. Nelson

Author Affiliations +

Optical Engineering, Vol. 25, Issue 1, 251173 (January 1986). https://doi.org/10.1117/12.7973796

Abstract

A small dark ring is formed when laser radiation is incident normally on a thin slab of transparent material that has an index of refraction greater than one, a smooth, specularly reflecting front surface, and a white diffusely reflecting substrate. The dark ring, which is located on the substrate, increases in size as the thickness of the transparent medium increases. It is formed when (1) the ratio of transparent medium thickness to diameter and (2) the ratio of laser beam diameter to transparent medium diameter are small. Since the radius of the dark ring is a function of the transparent medium thickness (as well as the index of refraction), the problem is two-dimensional. Experimental data are presented for the backscattered radiation in the normal direction as a function of radial distance from the incident laser beam. A geometric optics development is used to explain (1) the ring formation and (2) the effect of finite-sized detection apertures. Comparisons with the experimental measurements are used to verify the theoretical analysis.

Citation Download Citation

D. C. Look, Jr. and H. F. Nelson "Reflection Of Laser Radiation From Transparent Media (N >1) With A Diffusely Reflecting Substrate," Optical Engineering 25(1), 251173 (1 January 1986). https://doi.org/10.1117/12.7973796

Published: 1 January 1986

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