TABLE 1.

Comparison of measurements in a capillary and a microscope slide by FCS and PCH analysis

		Slide	Capillary
(FCS)	g (0)	0.57	0.60
	ω0 (mm)	0.25	0.27
(PCH)	ɛ (cpsm)	43,000	22,000
	N	0.15	0.12

The same dye solution was measured in a quartz capillary and on a microscope coverslip under otherwise identical conditions. PCH and FCS analysis were used to recover the fluctuation amplitude g(0), the beam waist ω₀, the molecular brightness ɛ and the average number of particles N for both measurements. The diffusion coefficient of the dye rhodamine 110 was fixed to a value of 300 μm²/s.