This topic is very poorly understood. How does fluence and pulsewidth relate to cellular denaturation – or, ‘cooking’ of the cells. I’m going to portray this in a series of graphs – I hope this works… When we fire light energy into the skin, we can generate some heating, if there is something in there… Continue reading Fluence, pulsewidths, temperatures and cellular denaturation
Category: Interesting stuff
Our new podcast…
Today, we launched our new podcast!! In it, myself and my daughter, Lisa McMahon, talk about all things laser and skin. We will have interviews with people from various places and sectors, ‘Ask Me Anything’, ‘Explain Like I’m 5’ and other laser-skin related topics. You can find us on most podcast sites or at the… Continue reading Our new podcast…
Hair removal – how does fluence relate to depth?
We all know that light energy can kill hair follicles. It has been around since about 1996. But, many people still don’t understand the relationship between fluence and depth in the skin. Let’s begin with fluence – what is it? Simply put, fluence is just the concentration of light energy on the skin surface. If… Continue reading Hair removal – how does fluence relate to depth?
“Synchronised hair growth” – Yes – it is real!
This issue keeps appearing in online forums. Many laser/IPL operators talk about ‘lots of hair growth’ usually after a few sessions. So, I investigated this with my computer model. I had developed this model a few years ago to look at the ‘best’ time intervals between repeat treatments. Last year, while researching laser/IPL treatment of… Continue reading “Synchronised hair growth” – Yes – it is real!
Neatcell “Picosecond Laser Pen” – Update
I have just been alerted to a new government warning about this device. I wrote about it last year (April 2024) pointing out that I thought it was not what they claimed and also potentially dangerous. You can find that post here – https://mikemurphyblog.com/2024/04/08/testing-the-neatcell-picosecond-laser-pen-device/ Well, a colleague alerted me to the fact that the UK… Continue reading Neatcell “Picosecond Laser Pen” – Update
My most popular videos so far… and Happy New year.
I had a look to see which of my video posts were the most popular. According to the viewing stats, these are my top five viewed videos… This video has been viewed 19,999 times as of today (27th Dec, 2024). The next viewer will be the 20,000th!! I hope you all have a good New… Continue reading My most popular videos so far… and Happy New year.
How does fluence change in the skin and why can this stop good results when treating hair, tattoos or blood vessels?
The way light moves through the skin is quite complex. When photons ‘meet’ atoms they can either be absorbed, scattered or completely ignored. This may happen many millions of times, or, sometimes, only once! The effect these events have on the fluence (energy concentration) can be quite marked. In this video I explain what can… Continue reading How does fluence change in the skin and why can this stop good results when treating hair, tattoos or blood vessels?
Association of Laser Safety Professionals – new Chairman
We held our AGM on Decemebr 11th and I was elected as the new Chairman of our Association. The Association of Laser Safety Professionals (ALSP) is a professional society of laser safety experts actively engaged in providing advice, support and training in laser safety, and covers all applications of laser technology. The primary aims of… Continue reading Association of Laser Safety Professionals – new Chairman
Two new videos – “Chasing the crack” and “Skin tones and fluence”
I was bored today, so I thought I’d make a couple of wee videos. The first one is about why we must apply our lasers at the skin surface properly, particularly with tattoo lasers. We DO NOT want to hear the ‘cracking; sound – that is completely wrong. The second video is about the relationship… Continue reading Two new videos – “Chasing the crack” and “Skin tones and fluence”
What is a Laser Protection Adviser and what do they do?
Today I was asked ‘what exactly is a Laser Protection Adviser (LPA)?’ So I thought I’d tell the whole world… In the UK, we have a number of specialists, who have a lot of experience with lasers and their safety aspects, who are known as LPAs. There are two groups of such people – the… Continue reading What is a Laser Protection Adviser and what do they do?
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