A laser scanning microscope for laser scanning a sample is provided. The laser scanning microscope includes a scanner that is operated at a predefined scanning speed and that is configured to change a direction of illumination light generated to illuminate the sample. A detector is configured to detect light that is returned from the sample and an amplifier assembly is connected to the detector and is configured to amplify a detection signal that is generated by the detector. The amplifier assembly includes an adjustable capacitor and a capacitance of the adjustable capacitor is adjusted depending on the scanning speed of the scanner.

In a sensor reader, an IC chip has a function for amplifying and outputting a sensor signal from each sensor element included in a sensor array, and includes a plurality of channel amplifiers connected each of the sensor elements. When an output switch is closed and the IC chip is in the outputting state, channel switches operate sequentially, and sensor amplification signals are output sequentially from the channel amplifiers. When the output switch is open and the IC chip is in the non-outputting state, a bias current of an operational amplifier of the channel amplifier is decreased, the IC chip is set to a low power consumption state, and gain of the operational amplifier is decreased.

In a sensor reader, an IC chip has a function for amplifying and outputting a sensor signal from each sensor element included in a sensor array, and includes a plurality of channel amplifiers connected each of the sensor elements. When an output switch is closed and the IC chip is in the outputting state, channel switches operate sequentially, and sensor amplification signals are output sequentially from the channel amplifiers. When the output switch is open and the IC chip is in the non-outputting state, a bias current of an operational amplifier of the channel amplifier is decreased, the IC chip is set to a low power consumption state, and gain of the operational amplifier is decreased.