Mechanism for adjusting an angle of a mirror incorporated in an optical device, and a parallax correcting mechanism of a camera

A parallax correcting mechanism of a camera for correcting a parallax between a photographing optical system and a viewfinder optical system which are provided independent of each other within said camera, said parallax correcting mechanism comprising:

• a mirror which serves as an element of said viewfinder optical system;
• a mirror frame which supports said mirror;
• a pair of pivotal-point projections formed on a viewfinder body to lie on a mirror rotational axis of said mirror, each of said pair of pivotal-point projections contacting a portion of a reflection surface of said mirror which is positioned outside an effective area of said reflection surface;
• a pair of recesses formed on one of said mirror frame and said viewfinder body;
• a pair of projections formed on the other of said mirror frame and said viewfinder body to be respectively engaged in said pair of recesses, said pair of projections and said pair of recesses being positioned on the opposite side of said reflection surface of said mirror with respect to said pair of pivotal-point projections;
• a leaf spring for pressing said mirror frame against said pair of pivotal-point projections;
• and
• an adjusting screw which is screwed into said viewfinder body on one side of said mirror frame with respect to said mirror rotational axis;
• wherein a flat face of a head of said adjusting screw, which is positioned on the thread side of said adjusting screw, contacts an end portion of said one side of said mirror frame.