Image pickup apparatus

摘要

An image pickup apparatus capable of capturing a composite image of a visible-light image and an infrared image of a subject is provided, whereby the configuration is simplified and made more convenient. A visible-light source ( 20 ) and an excitation-light source ( 22 ) for exciting a phosphorescent substance are provided as a light source ( 6 ) for a subject that includes an infrared-fluorescent substance. The light from the subject is passed through an optical filter ( 10 ) and directed into a CCD image sensor ( 12 ). The optical filter ( 10 ) cuts excitation light and transmits fluorescent light. The transmittance of visible light by the optical filter ( 10 ) is set lower than the transmittance of fluorescent light so that the weak infrared image from the fluorescent light is clearly displayed over the visible-light image. Since the CCD image sensor ( 12 ) is sensitive to infrared light as well as to visible light, an image signal is outputted for the composite image according to the incident light from the optical filter ( 10 ).