Other

Oasis Advanced Engineering, Inc.

Thomas Patrick Ryan

Jeffrey Wayne Minor

Donald B Jones

Henry Clarence Davies

Michael James Klingensmith

Edward Charles Schwartz

A fringe shift measurement system is provided and includes an optical phase mask configured to receive light fringes from optical flats. The optical phase mask has first and second halves, each half having alternating patterns of opaque rings and transparent rings. The first half pattern is phase-shifted with respect to the second half pattern. The first and second halves are configured to alternately block the light fringes or allow the light fringes to pass through the optical phase mask. A splitter is configured to direct the light fringes from the optical phase mask in desired directions. Concentrators are positioned to receive light fringes from the splitter and configured to focus the light fringes in a desired location. Detectors are configured to receive the focused light fringes from the concentrators and configured to convert the focused light fringes into digital signals. A control unit is configured to analyze the digital signals.

Fringe shift measurement system having an optical phase mask with phase-shifted first and second halves

A collimated periscope that is switchable between a normal optical view of the outside, a display view, and an overlay view in which the outside view and display view are combined. The switching element is an electronically switchable mirror with primarily reflective, primarily transparent, and intermediate states, depending on the application of electrical potentials.

Multi-purpose periscope with display and overlay capabilities

Growing community of inventors

Ann Arbor, MI, United States of America

Thomas Patrick Ryan