Scientific grade cooled CCD-cameras rep-resent the state-of-the-art detector for spatially resolved calcium-measurements. An integrated measurement system demands three essentials:
high sensitivity / low noise image sensors
fast, but accurate wavelength toggling
perfect synchronization of both components
Experimental Methods:
fast change of excitation wavelength via polychromator or filterwheel
excitation wavelength e.g. Fura-2
emission wavelength, e.g. BCECF or CFP/YFP/FRET
acquisition of two different emission bands via filterwheel (sequentially) or with our simultaneously with DualView Imager e.g. GFP-FRET or Indo.
Observation of single wavelength fluorescence of calcium-indicators