X-RAY MICROSCOPE

An X-ray microscope has an X-ray filter for transmitting a wavelength between 43.7 and 65 .ANG. and a light source for emitting ultraviolet light of a wavelength of at least 100 nm in an optical path so that a specimen is irradiated with X rays and an image of an object is formed by an X-ray detector, in which the ultraviolet light is reflected from the X-ray filter to irradiate the specimen. Thus, the X-ray microscope allows biological observation to be made with a transmitted microscopic image of high quality and has advantages in design and choice of materials in fabricating its system.