lighting geekery: photoacoustic spectroscopy

I’m still amazed that after about 20 years specializing in lighting, I can still learn new things that lighting does.  Today’s crazy new thing: Photoacoustic spectroscopy.  Basically, light has enough energy in it to cause material to vibrate, generating acoustic signals that can be measured. I find this interesting because I’ve felt the affect first hand – holding my hand in the beam of a super powerful, crazy-narrow beam LED fixture (which doesn’t have any IR or UV energy in the beam), you can feel the power of the photons.  Mostly what I felt is probably thermal absorption in my skin, … Continue reading lighting geekery: photoacoustic spectroscopy