A photoelectric detector. Laser light emitted from a laser (2) of the detector is focused on a sample to be detected (6) by means of an objective lens of an upright fluorescence microscope (1) to excite said sample (6) to produce a fluorescence signal; an image acquisition device (3) collects the fluorescence signal output by the upright fluorescence microscope (1) and images the fluorescence signal; an input end of a first probe (4) and an input end of a second probe (5) are respectively connected to electrodes on both ends of said sample (6); an output end of the first probe (4) is electrically connected to an input end of an electric signal amplifier (7); an output end of the second probe (5) is electrically connected to an output end of a signal acquisition device (8); an output end of the electric signal amplifier (7) is electrically connected to an input end of the signal acquisition device (8); a signal processing device is used for obtaining an electric signal collected by the signal acquisition device (8), and generating and outputting electric characteristic data; and the signal processing device is further used for triggering an optical system and an electric system to operate synchronously. The photoelectric detector can reduce omission of important information in the biophysical process of said sample.
PHOTOELECTRIC DETECTOR