Fig. 2.

Hybrid endocytoscopy and endomicroscopy system. (a) Schematic of optical system; (b) timing diagram showing synchronization of galvanometer voltage (slow axis scan), laser modulation, camera trigger TTL and acquisition of endomicroscope and endocytoscope image frames. Note that that pulse lengths are illustrative and not precisely to scale, and that the pulse heights are arbitrary. Abbreviations: MM: multimode, Pol.: polarizing, LED: light emitting diode, MO: microscope objective, APD: avalanche photodiode, LPF: long pass wavelength filter, L1 & L3: achromatic doublet, f = 50 mm, L2: achromatic doublet, f = 75 mm.