초록 ▼

A focus detecting device for detecting the focus position of an image forming system comprises plural arrays of small lenses, plural units of photoelectric elements respectively corresponding to the small lenses of the lens arrays and a synthesizing device. Each of the arrays includes plural small l

A focus detecting device for detecting the focus position of an image forming system comprises plural arrays of small lenses, plural units of photoelectric elements respectively corresponding to the small lenses of the lens arrays and a synthesizing device. Each of the arrays includes plural small lenses arranged in a predetermined direction in the vicinity of a focal plane of the image forming system and the plural lens arrays are positioned mutually parallel. Each of the plural units of photoelectric elements is positioned behind the corresponding one of the small lenses. The synthesizing device synthesizes photoelectric output signals from the units of photoelectric element behind the positionally corresponding small lenses belonging to the plural lens arrays.

대표청구항 ▼

A focus detecting device for detecting the focus position of an image forming system, comprising: (1) plural arrays of small lenses, each of said arrays including plural small lenses arranged in a predetermined direction in the vicinity of a focal plane of said image forming system and said plural l

A focus detecting device for detecting the focus position of an image forming system, comprising: (1) plural arrays of small lenses, each of said arrays including plural small lenses arranged in a predetermined direction in the vicinity of a focal plane of said image forming system and said plural lens arrays being positioned mutually parallel; (2) plural photoelectric element means respectively corresponding to the small lenses of said lens arrays, each of said photoelectric element means being positioned behind a corresponding one of said small lenses; and (3) means for synthesizing photoelectric output signals from said photoelectric element means behind the positionally corresponding small lenses belonging to said plural lens arrays.