Mary M Mccann

US Patent:

39763684, Aug 24, 1976

Filed:

Dec 4, 1974

Appl. No.:

5/529407

Inventors:

Mary Conlin McCann - Belmont MA
William T. Plummer - Concord MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G02B 504
G02B 718

US Classification:

350286

Abstract:

The invention is an optical element, one version of which is useful for operating an automatic exposure control of a self-contained camera coupled to a microscope without detracting from the brightness of the magnified image to be recorded on the camera's film format. The article includes three reflecting surfaces arranged to extract a small part of the light emerging from the microscope's eyepiece and direct it into the photodetector of the automatic exposure control. A lensrefracts the light, after the third reflection, to improve the distribution of the light onto the camera's photodetector. The article is suitable for manufacture as a homogeneous molding of transparent plastic.

US Patent:

40218252, May 3, 1977

Filed:

May 15, 1975

Appl. No.:

5/577915

Inventors:

John J. McCann - Belmont MA
Mary A. McCann - Belmont MA
William T. Plummer - Concord MA
Myron A. Seiden - Needham MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1748

US Classification:

354 79

Abstract:

An adapter for operatively coupling a reflex camera having a preprogrammed automatic cycle of operation to an optical instrument such as a microscope or telescope. The adapter includes mechanisms which permit the operator to selectively modify the preprogrammed cycle of operation for the purpose of making extended time exposures or allowing vibrations induced by the movement of a camera reflex member to subside prior to initiating film exposure.