초록 ▼

A focus detecting device having a light distribution forming device for forming the light intensity distribution whose relative position varies in accordance with the focus adjustment of an object lens from the light flux passing through the object lens, a sensing device for receiving the light inte

A focus detecting device having a light distribution forming device for forming the light intensity distribution whose relative position varies in accordance with the focus adjustment of an object lens from the light flux passing through the object lens, a sensing device for receiving the light intensity distribution and outputting a signal representing the state of focus adjustment of the object lens based on the relative position in the light intensity distribution, and having a plurality of sensing elements, and a light diffusing device disposed in or near a predetermined imaging plane of the object lens, and having the degree of light diffusion determined so that the light intensity distribution can be moved relatively in accordance with the adjustment of the object lens.

대표청구항 ▼

A focus detecting device comprising: light distribution forming means for forming light intensity distributions whose relative positions are varied in accordance with a focus adjustment of an objective lens from light flux passing through the objective lens; sensing means having a plurality of sensi

A focus detecting device comprising: light distribution forming means for forming light intensity distributions whose relative positions are varied in accordance with a focus adjustment of an objective lens from light flux passing through the objective lens; sensing means having a plurality of sensing elements, said sensing means receiving the light intensity distributions from said light distribution forming means and outputting a signal representing the state of focus adjustment for the objective lens based on the relative positions of the light intensity distributions on said sensing means; and light diffusing means disposed in or near a predetermined imaging plane of said objective lens and on a light path between said objective lens and said sensing means, and having a degree of light diffusion determined so that the positions of the light intensity distributions vary in accordance with the focus adjustment state of said objective lens.