Patent ID: 7400396

Claim:
Fluorescence correlation spectroscopy analyzer comprising: an excitation light illuminating optical system, illuminating excitation light onto a predetermined region of a measured sample; a fluorescence imaging optical system, imaging the fluorescence emitted from fluorescent molecules within the predetermined region of the measured sample onto which the excitation light has been illuminated from the excitation light illuminating optical system; a detector, having a photodetection surface, disposed on an image plane position of the fluorescence imaged by the fluorescence imaging optical system and provided with a plurality of pixels that are arrayed two-dimensionally along a first direction and a second direction that intersect mutually, photoelectrically converting, according to each of the pixels, the fluorescence made incident on the photodetection surface, transferring the charges generated by the photoelectrical conversion in the first direction and the second direction, and outputting the charges as detection signals corresponding to fluorescence intensities from an output terminal; and an analyzing unit, inputting the detection signals from a plurality of analyzed pixels belonging to an analyzed pixel set, comprising a portion of pixels selected from among all of the pixels, arrayed on the photodetection surface, in accordance with the incidence region of the photodetection surface on which the fluorescence is imaged by the fluorescence imaging optical system, and determining an autocorrelation function for each of the detection signals, thereby determining the autocorrelation functions of temporal variations of the fluorescence intensities for the respective analyzed pixels included in the analyzed pixel set.