Optogenetics Irradiance Calculator Calculate power needed for opsin activation. Type of brain matter: Grey matter eg. cortex Mixed eg. thalamus White matter eg. brainstem Fibre core diameter (um): Power (mW): Irradiance (mW/mm^2) Depth (mm) NA = 0.22 NA = 0.39 NA = 0.50 NA = 0.66 0.0 0.1 0.2 0.3 0.4 0.5 0.75 1.0 1.5 2.0 3.0 Share this:EmailLinkedInTwitterFacebookRedditLike this:Like Loading...