OBSERVATION DEVICE AND WAVELENGTH LIMITING FILTER

摘要

An observation device to observe a sample cultured in a culture vessel is provided with an illumination optical system including an illuminating unit for illuminating the sample, an image picking-up unit including an image picking-up element for picking up an image of the sample illuminated by the illuminating unit and a wavelength limiting filter set on the optical axis of the illumination optical system between the illuminating unit and the image picking-up unit to limit a part of the wavelengths of illuminating light from the illumination optical system in accordance with a light absorption characteristic of an additive contained in the culture group used for the culture of the sample. Thus, the observation device suppresses image changes caused by the additive and makes it possible to generate a proper image in an automatic observation.