Apparatus for determining the relative position of the plane of

Details Apparatus for determining the relative position of the plane of Apparatus for determining the relative position of the plane of

1974-10-24

1976-04-27

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, 250237G, 354 25, G01J 120

Patent

active

039537285

ABSTRACT:
In an apparatus, an imaging system, at least one optically effective grating and a photoelectric receiver system are employed for determining the relative position of the plane of maximum amplitude of a spatial frequency component in the image of an object. The imaging system produces from light fluxes emanating from the object and traversing different regions of the entrance pupil of the imaging system an image of the object in a first, a second and a third intermediate image plane. The focussing screen mounted in the first plane is used for subjectively observing and focussing the object as well as for transmitting light fluxes to the optically effective grating which defines a given spatial frequency component and which is mounted at least in the vicinity of the second intermediate image plane for commonly modulating and splitting the light fluxes. The photoelectric receiver system generates therefrom electrical output signals used in devices for indicating and adjusting the sharp focussing of the object.

REFERENCES:
patent: 3610934 (1971-10-01), Turner
patent: 3682071 (1972-08-01), Hosoe
patent: 3781110 (1973-12-01), Leitz et al.
patent: 3798660 (1974-03-01), Hasegawa et al.
patent: 3830571 (1974-08-01), Imai et al.

Affiliated with

Also associated with

Rating

Apparatus for determining the relative position of the plane of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for determining the relative position of the plane of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for determining the relative position of the plane of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2004656