Automatic focus detection device

Details Automatic focus detection device Automatic focus detection device

1982-04-02

1983-11-29

Adams, Russell E.

G03B 310

Patent

active

044177950

ABSTRACT:
In the disclosed automatic focus detection device, two image forming lenses have optical axes fixedly spaced a predetermined distance. Distance measuring elements are arranged near the focal points behind each image forming lens. A holding member holding one of the distance measuring elements is rotated around a shaft outside of the space between the optical axes of the two lenses so as to alter the distance between the distance measuring element and the image forming lens. According to an embodiment, one of the measuring elements is a light source which scans the object through one of the lenses when the holding member is rotated. Rotation of the holding member refocuses the light source throughout its scan.

REFERENCES:
patent: 3274914 (1966-09-01), Biedermann et al.
patent: 3435741 (1969-04-01), Stimson
patent: 3442193 (1969-05-01), Pagel
patent: 4032934 (1977-06-01), Hendrickson et al.
patent: 4123650 (1968-10-01), Hosoe et al.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-605514