title: A series of flexible design adaptations to the Nikon E-C1 and E-C2 confocal microscope systems for UV, multiphoton and FLIM imaging.
abstract: Multiphoton microscopy is widely employed in the life sciences using extrinsic fluorescence of low- and high-molecular weight labels with excitation and emission spectra in the visible and near infrared regions. For imaging of intrinsic and extrinsic fluorophores with excitation spectra in the ultraviolet region, multiphoton excitation with one- or two-colour lasers avoids the need for ultraviolet-transmitting excitation optics and has advantages in terms of optical penetration in the sample and reduced phototoxicity. Excitation and detection of ultraviolet emission around 300 nm and below in a typical inverted confocal microscope is more difficult and requires the use of expensive quartz optics including the objective. In this technical note we describe the adaptation of a commercial confocal microscope (Nikon, Japan E-C1 or E-C2) for versatile use with Ti-sapphire and OPO laser sources and the addition of a second detection channel that enables detection of ultraviolet fluorescence and increases detection sensitivity in a typical fluorescence lifetime imaging microscopy experiment. Results from some experiments with this setup illustrate the resulting capabilities.
authors: Central Laser Facility, STFC, Rutherford Appleton Laboratory, Research Complex at Harwell, Harwell Oxford, Didcot, UK.
authors: Stanley W
authors: SW
authors: Botchway
authors: Kathrin M
authors: KM
authors: Scherer
authors: Steve
authors: S
authors: Hook
authors: Christopher D
authors: CD
authors: Stubbs
authors: Eleanor
authors: E
authors: Weston
authors: Roger H
authors: RH
authors: Bisby
authors: Anthony W
authors: AW
authors: Parker
mesh_terms: D017209:Apoptosis; D004867:Equipment Design; D005456:Fluorescent Dyes; D018613:Microscopy, Confocal / Q000295:instrumentation*; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D014407:Tumor Cells, Cultured
chemical_list: D005456:Fluorescent Dyes
keywords: Combretastatin; FLIM; confocal; multiphoton microscopy; serotonin; short-wavelength UV; two-photon; ultraviolet