JLA Vol:1 Iss:1 (Laser Applications in Biomedicine. Part I: Biophysics, Cell Biology, and Biostimulation)

Authors:
Michael W. Berns
J. Stuart Nelson
Beckman Laser Institute and Medical Clinic, Department of Surgery, University of California, Irvine

The successful applications of lasers to biomedicine rely upon an adequate understanding of the principles of light interaction with tissue. These principles are based upon the fundamentals of photophysics and involve a variety of mechanisms of energy conversion: heat, photochemistry, non‐thermal bond breaking, fluorescence, and mechanical shock waves. All of these mechanisms are discussed in the context of biomedical and basic cellular studies. In addition, the mechanism and use of low power (milliwatt) lasers are examined ...

JLA Vol:1 Iss:1 (Resonant ATR (Attenuated Total Reflectance) Spectroscopy and Semiconductor Technology)

Authors:
Bruno Bosacchi
AT&T Bell Laboratories ‐ Engineering Research Center, Princeton, New Jersey

We review the resonant ATR spectroscopy as an effective way to enhance the sensitivity of the optical measurements in semiconductor technology. After a short introduction of the basic principles, we consider its application to the non‐destructive characterization of the multilayer structures used in the manufacture of electronics and optoelectronics devices (Resonant ATR technique).

JLA Vol:1 Iss:1 (High‐Speed Laser Welding Discontinuities)

Authors:
Charles E. Albright
Shichan Chiang
Department of Welding Engineering, Ohio State University, Columbus, Ohio

JLA Vol:1 Iss:2 (Laser Applications in Biomedicine. Part II: Clinical Applications)

Authors:
J. Stuart Nelson
Michael W. Berns
Beckman Laser Institute and Medical Clinic, University of California, Irvine, 1002 Health Sciences Road East, Irvine, California 92715

JLA Vol:1 Iss:3 (Experimental Laser Welding Thermal Cycles)

Authors:
E. A. Metzbower
U.S. Naval Research Laboratory, Code 6324, Washington DC 20375‐5000, U.S.A.

JLA Vol:1 Iss:4 (FDA Medical Incident Report Is Sobering Reminder of Laser Safety Education Needs)

Authors:

JLA Vol:1 Iss:4 (Optical Engineering — A New Form of Industrial Energy)

Authors:
W. M. Steen

A brief review OF the development of civilization on this planet leads to a fairly strong correlation between our ability to apply new forms of energy and the growth of our quality of life. With the comparatively recent invention of the laser, optical energy has become available in a form and at intensities which can be applied. This article examines some of the differences between optical energy and other forms of industrial energy with a view to suggesting where future growth may occur and why our grand‐children may bask in a higher quality of life due to our efforts to apply this new form of energy. Some of the principle differences noted are: the current laser ...

JLA Vol:1 Iss:4 (Laser Accidents: Are They All Reported and What Can Be Learned from Them?)

Authors:
R. James Rockwell
Rockwell Laser Industries, Cincinnati, Ohio

JLA Vol:1 Iss:3 (Laser Welding of Plastics in Low and High Gravity Environments)

Authors:
R. E. Mueller
W. W. Duley
CRESS and Laser Processing Laboratory, York University, Toronto, Ontario, Canada M3J 1P3

S. MacLean
M. Garneau
B. Tryggvason
Canadian Astronaut Office, National Research Council, Ottawa, Ontario, Canada K1A 0R6

W. F. J. Evans
Atmospheric Environment Service, 4905 Dufferin Street, Downsview, Ontario M3H 5T4

Initial results of a series of laser processing experiments performed under the micro‐gravity conditions supplied by NASA's KC‐135 aircraft are presented. Weld morphologies of polypropylene and polyethylene were obtained under both hyper‐ and hy...

JLA Vol:1 Iss:3 (CO₂ Laser Engraving System for Relief Plate to Print Corrugated Cardboard)

Authors:
K. Wakabayashi
N. Sugishima
NEC Corporation, Laser Equipment Div., 1120, Shimokuzawa, Sagamihara, JAPAN

A very compact and economical CO₂ laser engraving system to make relief plates for the purpose of printing corrugated cardboard has been developed. This system consists of a highly stable 500W CO₂ laser and a high speed, easy handling image processing sub‐system. In this paper several new developments are described. This image processing technique for CO₂ laser raster scanning and engraving has been newly developed. Every binary image is converted to the relief plate more easier than other reported engraving systems.