The Scientist Staff | Jun 21, 1998 | 3 min read
If you liked confocal microscopy, you're going to love multi-photon systems, now available from Bio-Rad Instruments. Taking the principle of confocal microscopy one giant step further, multi-photon microscopes use rapidly oscillating, low energy laser light to illuminate a small sample area--as small as 0.1 femtoliter. Working cooperatively, the energy from two (or three in some cases) photons can excite fluorochromes that ordinarily require high energy excitation. What does this get you? Deep