| http://www.w3.org/ns/prov#value | - The objective optical system according to the present invention is so adapted as to refract light at least twice for deflecting viewing direction by arranging obliquely or eccentrically, at least one surface except the entrance surface (the first surface) of the optical component closest to an object out of the surfaces of such optical components as lenses, prisms, etc. to compose said objective o
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