Last Updated:
January 14, 2018
Articles applicable to the field of tissue optics.
The role of coherence in laser phototherapy
The role of coherence in laser phototherapy By Tomas Hode, PhD Introduction The importance of coherence and laser speckles in LPT has been discussed over the last 30 years. Coherence [1] is often defined as a property of wave-like states read more
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The illusive “Class 4” lasers…
The illusive “Class 4” lasers A comment on: Ottaviani G, Gobbo M, Sturnega M, Martinelli V, Mano M, Zanconati F, Bussani R, Perinetti G, Long C S, Di Lenarda R, Giacca M, Biasotto M, Zacchigna S. Effect of Class IV read more
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More Class IV myths…
“A Class 3B will take all day to do what a Class IV can do in minutes…” Peter A. Jenkins, MBA This claim, used to promote the supposed benefits of a high-power Class IV laser for LPT, is based on read more
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The “Class IV” myths…
The “Class IV” myths By Jan Tunér Several manufacturers offer lasers in the Class 4 (IV) group of lasers; that is lasers emitting more than 500 mW. This classification is a bit problematic, because it is possible to start a read more
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The penetration of laser light – a simple demonstration
The penetration of laser light – a simple demonstration By Jan Tunér If you do not think that laser light can penetrate deep into human tissue, just have a look at the photo below. What you see is a 660 read more
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GaAs laser – how to get it right
The GaAs laser (904/905 nm) has been on the market for many years, first introduced by the Italian Space Company in the late 80s. GaAs technology is more complicated than the more common InGaAlP and GaAlAs lasers, so few manufacturers read more
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Stacking the Deck?
Stacking the Deck? We received an email from a reader with regards to this presentation: (Light Years Ahead 1.7 MB PDF), asking for our comments. Here they are: I had a look at the presentation by Dr. Godbold and have made read more
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