초록 ▼

A focus detecting device which is provided with a field lens disposed on the predetermined imaging plane of an objective lens and a plurality of imaging lenses disposed rearwardly of the field lens and in which the images of the imaging lenses are sensed to thereby determine the focus adjusted state

A focus detecting device which is provided with a field lens disposed on the predetermined imaging plane of an objective lens and a plurality of imaging lenses disposed rearwardly of the field lens and in which the images of the imaging lenses are sensed to thereby determine the focus adjusted state of the objective lens. A unit body integrally constitutes the units such as the field lens and the imaging lenses and has a surface for movably supporting the field lens. The unit body also has adjusting device for rotating the imaging lenses relative to the optical axis.

대표청구항 ▼

A device for detecting the focus adjustment state of an objective lens, comprising: (a) a field lens disposed near the predetermined imaging plane of the objective lens; (b) imaging means for re-forming a plurality of images from a light beam emerging from said field lens; (c) a sensor for sensing t

A device for detecting the focus adjustment state of an objective lens, comprising: (a) a field lens disposed near the predetermined imaging plane of the objective lens; (b) imaging means for re-forming a plurality of images from a light beam emerging from said field lens; (c) a sensor for sensing the light intensity distribution of the plurality of images re-formed by said imaging means and producing information about the focus adjustment state of the objective lens based on the relative position of the plurality of images; (d) a member having a support surface on which said field lens means is movable, wherein movement of said field lens on said support surface facilitates the directing of the light beam emerging from the objective lens to said imaging means.