Multiple viewing attachment for an endoscope.

摘要

A multiple viewing attachment is provided with a spatial filter (16) with an optical characteristic for removing an image corresponding to an optical fiber arrangement pattern of an image guide (2) from an image observed by an endoscope guided by the image guide of the endoscope (1). The spatial filter (16) has a plurality of coating spots (18) regularly arranged on a transparent plate (17) in correspondance with the arrangement pattern of the optical fibers. The light rays passing through the coating spots has a phase difference of 1/2 wave length or odd number times of the 1/2 wave length, compared to the light beam rays passing through the transparent plate (17).