Polarization fundus camera for effectively suppressing internal reflection

A polarization fundus camera for effectively suppressing internal reflection, comprising:

• an illumination unit emitting light;
• a diffusion lens diffusing light introduced from the illumination unit;
• an illumination lens irradiating the light introduced from the diffusion lens at a predetermined emission angle;
• a mirror reflecting light introduced from the illumination lens;
• a polarization beam splitter transmitting P polarized light and reflecting S polarized light from the light introduced from the mirror;
• an objective lens enlarging an image of a fundus formed by the light introduced from the polarization beam splitter;
• a short-range eyepiece lens reducing an image of the fundus enlarged by the objective lens;
• a linear polarization filter through which only the P polarized light passes;
• a narrowband optical filter having a band of 12 nm or less for the light passing through the linear polarization filter and filtering the light emitted from the polarization beam splitter;
• and
• an imaging device acquiring an image by converting the light passing through the narrowband optical filter into an electric signal,
• wherein the linear polarization filter includes each of
• a first linear polarization filter provided between the illumination unit and the polarization beam splitter, and
• a second linear polarization filter provided between the polarization beam splitter and the short-range eyepiece lens.