Scanning-type observation apparatus

A scanning-type observation apparatus comprising:

• a first emission optical system configured to emit first light including a spatially modulated component;
• a second emission optical system configured to emit second light coherently and temporally modulated;
• a wave combining unit configured to wave-combine the first light and the second light;
• a scanning unit configured to synchronously scan the first light and the second light which have been wave-combined;
• a condensing lens configured to condense each of the first light and the second light which have been scanned;
• a placement unit configured to allow a specimen to be placed at a light condensing position of the condensing lens;
• a light capturing lens located on a side opposite to the condensing lens across the placement unit and configured to capture secondary light received from the specimen;
• a detection unit configured to detect the secondary light captured by the light capturing lens;
• a separation unit configured to temporally demodulate a signal received from the detection unit and to separate the demodulated signal into a first signal corresponding to a non-linear photothermal effect having occurred at the specimen by irradiation of the second light and a second signal which does not contain the non-linear photothermal effect;
• and
• an image generation unit configured to generate an image based on scan information concerning the scanning unit and at least one of the first signal and the second signal.