Focus detection apparatus

Details Focus detection apparatus Focus detection apparatus

1985-06-06

1987-01-06

Perkey, William B.

350 16, 350165, G03B 300, G02B 522

Patent

active

046342559

ABSTRACT:
A focus detection apparatus has a field lens on or in a vicinity of an anticipated focal plane of an imaging lens and a refocusing optical system arranged behind the field lens to focus light beams transmitted through different areas in a pupil of the imaging lens onto a photo-sensor array to form a secondary image thereon, and detects a focus in accordance with an output signal of the photo-sensor array. A filter which blocks an infrared ray and transmits a visible ray is arranged adjacent to the field lens to prevent degradation of a filtering characteristic which depends on an inclination of a main light impinging to the filter.

REFERENCES:
patent: 4229066 (1980-10-01), Rancourt et al.
patent: 4531835 (1985-07-01), Oinoue

Affiliated with

Also associated with

Rating

Focus detection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focus detection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-680756