Range finding optical mechanism

DETAILED DESCRIPTION It is an object of the present invention to provide, in a system using a pair of fixed imaging optical systems to effect range finding, a range finding optical mechanism which can render images to be formed on photoelectric converter means formable in relatively equal conditions.
It is another object of the present invention to provide, in a system using a pair of fixed imaging optical systems to effect range finding, a range finding optical mechanism which can ensure that two images to be formed on photoelectric converter means through the imaging optical systems correctly lie on the photoelectric converter means arranged in the form of a row.
It is still another object of the present invention to provide a range finding optical mechanism which can accurately determine the range finding view field range where the range finding optical system is provided separately with respect to the phototaking optical system of a camera.
According to the present invention, a regulating mechanism is provided in one or both of the imaging optical systems so that the relative imaged positions of two images to be formed on a photosensor array are displaceable in three directions perpendicular to one another, and the formed images are regulatable in three directions, for example, the direction of the optical axis, the row direction of the photosensor array and a direction perpendicular to said two directions and therefore, the object images can be formed in a relatively correct positional relation and in the same focused condition.
According to the present invention, there is provided a regulating mechanism which can cause the photosensor array as photoelectric means arranged in the form of a row to rotate substantially about the optical axis of one of the imaging optical systems and in a plane perpendicular to the optical axis and therefore, it is ensured that two images to be formed through the pair of imaging optical systems correctly lie on the row of the photoelectric converter means