초록 ▼

In a focus detecting apparatus wherein an imaging optical system is disposed rearwardly of the predetermined imaging plane of an objective lens to thereby form a plurality of object images on the basis of lights passed through different portions of the pupil of the objective lens and each of the obj

In a focus detecting apparatus wherein an imaging optical system is disposed rearwardly of the predetermined imaging plane of an objective lens to thereby form a plurality of object images on the basis of lights passed through different portions of the pupil of the objective lens and each of the object images is detected by a line sensor comprising a plurality of photoelectric conversion elements to thereby detect the focus condition of the objective lens from the amount of deviation of each object image, a field limitation plate having a plurality of openings and an optical filter for causing the characteristics of the light passed through the openings of the field limitation plate to differ from one another are provided near the predetermined imaging plane of the objective lens. Thus, the apparatus is adaptable for different focus detection conditions and is very simple in construction.

대표청구항 ▼

A focus detecting apparatus for detecting the focus condition of an objective lens, comprising: (a) light intercepting means having a plurality of openings such that a stream of light passes from said objective lens through each opening, said light intercepting means disposed near a predetermined im

A focus detecting apparatus for detecting the focus condition of an objective lens, comprising: (a) light intercepting means having a plurality of openings such that a stream of light passes from said objective lens through each opening, said light intercepting means disposed near a predetermined imaging plane of said objective lens; (b) imaging means for forming a plurality of images on the basis of each of the light streams passing through the openings of said light intercepting means; (c) filter means for causing an optical characteristic of the light streams passing through the openings of said light intercepting means to differ from one another; and (d) sensing means for sensing the images formed by said imaging means.