Lateral scattered light used to study laser light propagation in turbid media phantoms

Claudia Valdes; Efrain Solarte

doi:10.1117/12.843101

24 February 2010 Lateral scattered light used to study laser light propagation in turbid media phantoms

Claudia Valdes, Efrain Solarte

Proceedings Volume 7567, Design and Performance Validation of Phantoms Used in Conjunction with Optical Measurement of Tissue II; 75670C (2010) https://doi.org/10.1117/12.843101
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

Laser light propagation in soft tissues is important because of the growing biomedical applications of lasers and the need to optically characterize the biological media. Following previous developments of the group, we have developed low cost models, Phantoms, of soft tissue. The process was developed in a clean room to avoid the medium contamination. Each model was characterized by measuring the refractive index, and spectral reflectance and transmittance. To study the laser light propagation, each model was illuminated with a clean beam of laser light, using sources such as He-Ne (632nm) and DPSSL (473 nm). Laterally scattered light was imaged and these images were digitally processed. We analyzed the intensity distribution of the scattered radiation in order to obtain details of the beam evolution in the medium. Line profiles taken from the intensity distribution surface allow measuring the beam spread, and to find expressions for the longitudinal (along the beam incident direction) and transversal (across the beam incident direction) intensities distributions. From these behaviors, the radiation penetration depth and the total coefficient of extinction have been determined. The multiple scattering effects were remarkable, especially for the low wavelength laser beam.

Citation Download Citation

Claudia Valdes and Efrain Solarte "Lateral scattered light used to study laser light propagation in turbid media phantoms", Proc. SPIE 7567, Design and Performance Validation of Phantoms Used in Conjunction with Optical Measurement of Tissue II, 75670C (24 February 2010); https://doi.org/10.1117/12.843101

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