Milton S Dietz

US Patent:

43256163, Apr 20, 1982

Filed:

Jan 10, 1980

Appl. No.:

6/110811

Inventors:

Milton S. Dietz - Lexington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 714
G03B 718

US Classification:

354 27

Abstract:

Apparatus for automatically varying positioning of an infrared filter relative to a light sensing photocell of an exposure control system having scanning type shutter blades provided with cooperating pairs of primary and secondary apertures, which are displaced between first and second positions to respectively control the passage of light to a film plane and to the photocell, includes an infrared filter cooperating with at least one secondary aperture for blocking transmission of infrared to the photocell when the apertures are positioned for high ambient light conditions and for allowing passage of infrared to the photocell when positioned for low ambient light conditions where flash illumination provides a greater contribution to the exposure.

US Patent:

44286546, Jan 31, 1984

Filed:

Apr 20, 1981

Appl. No.:

6/255694

Inventors:

Milton S. Dietz - Lexington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 708
G03B 1503

US Classification:

354413

Abstract:

A method and an apparatus are disclosed for controlling exposure whereby scene radiation is generally simultaneously evaluated from one zone of the scene in a spectrally different manner from another zone thereof so as to define the exposure in accordance with selected frequencies from the selected zones.

US Patent:

41533623, May 8, 1979

Filed:

Feb 1, 1977

Appl. No.:

5/764651

Inventors:

Milton S. Dietz - Lexington MA
William J. McCune - South Lincoln MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1756

US Classification:

354293

Abstract:

A battery operated camera includes a carrying or neck strap having a handle thereon for receiving and supporting an external electrical battery for powering electrical components of the camera.