Physical information acquisition device, solid-state imaging device and physical information acquisition method

A physical information acquisition device comprising:

• an electromagnetic wave irradiation section adapted to irradiate irradiation light onto an object whose image is to be acquired;
• a first detection section adapted to detect electric charge of an image component when the object is illuminated with irradiation light irradiated from the electromagnetic wave irradiation section;
• a second detection section adapted to detect electric charge of the image component when the object is illuminated with natural light;
• and
• a signal processing section adapted to perform signal processing based on detection information acquired from the first and second detection sections, wherein
• the electromagnetic wave irradiation section generates light at some specific wavelengths in the wavelength range other than the range of visible wavelengths.

A physical information acquisition method comprising the steps of:

• irradiating an object with electromagnetic wave at a wavelength equivalent to a specific wavelength when, for a first wavelength range of electromagnetic wave, a wavelength where electromagnetic wave energy is lower than at other wavelengths is determined to be the specific wavelength;
• detecting electromagnetic wave at the specific wavelength reflected by the object with a detection section;
• and
• performing signal processing based on detection information acquired from the detection section.