1
Juris Upatnieks: Compact head-up display. Environmental Research Institute of Michigan, Krass & Young, December 8, 1987: US04711512 (248 worldwide citation)

A compact head-up display comprising a combiner which combines light energy from an outside view with light energy transmitted within the combiner and diffracted out by means of an upper diffraction grating. The head-up display disclosed further comprises an image source, a collimating lens, and a l ...


2
Anthony M Tai, Juris Upatnieks, Eric J Sieczka: Compact holographic sight. Environmental Research Institute of Michigan, Brooks & Kushman, January 9, 1996: US05483362 (55 worldwide citation)

A holographic sight which includes a base having at least one connector for mounting the base on a small arm, and a hologram of a reticle pattern, a compact laser light source for illuminating the hologram, and a power source for the laser diode, each mounted on the base. The sight also includes an ...


3
Juris Upatnieks: Method and apparatus for recording and displaying edge-illuminated holograms. Environmental Research Institute of Michigan, Krass & Young, February 17, 1987: US04643515 (29 worldwide citation)

Methods and apparatus for recording and displaying edge-illuminated holograms. Disclosed is a method for producing holograms whereby the reference beam, when recording, and the illumination beam, when displaying the hologram, impinge on the edge of the cover plate placed over the hologram. Edge-illu ...


4
Juris Upatnieks: Compact hologram displays & method of making compact hologram. Environmental Research Institute of Michigan, Krass & Young, September 29, 1992: US05151800 (19 worldwide citation)

A compact, self-contained monolith hologram display apparatus includes a laser diode mounted on an edge of a solid glass plate having a front surface with a hologram mounted thereon. The beam is expanded within the glass plate and is reflected off an opposing mirrored contoured edge surface that col ...


5
Juris Upatnieks, Charles R Christensen, Bobby D Guenther: Coherent optical correlator. The United States of America represented by the Secretary of the Army, Nathan Edelberg, Robert P Gibson, Robert C Sims, July 7, 1981: US04277137 (19 worldwide citation)

Reference scenes stored in a filter set containing an array of sets of suimposed, holographic, matched filters are optically correlated with input images displayed on an optically-addressed, liquid crystal, light modulator 34. In operation, a selected laser diode is energized to direct a polarized l ...


6
Juris Upatnieks: Holographic light line sight. Environmental Research Institute of Michigan, Krass & Young, March 15, 1977: US04012150 (17 worldwide citation)

A sight for determining the direction and distance from a viewer to a target employs a transparent panel containing a hologram of a line of light on a plain background. The line extends from one side of the field of view, near the viewer, away from the hologram, and terminates at its far end in the ...


7
Juris Upatnieks: Aberration correction of magnified holographic images. Environmental Research Institute of Michigan, Krass & Young, September 23, 1980: US04223975 (8 worldwide citation)

In the process of reconstruction of a virtual image of a light line having one end disposed at infinity with respect to the observer from a hologram of a shorter light line by shifting the position of the reconstructing light source relative to the hologram with respect to the position of the refere ...


8
Stephen B Segall, Juris Upatnieks: Optical method and system for rapidly measuring relative angular alignment of flat surfaces. The Regents of the University of Michigan, Harness Dickey & Pierce, January 6, 2004: US06674521 (6 worldwide citation)

A reconfigurable optical method and system for rapidly measuring relative angular alignment of flat surfaces are provided. The method and system can be used to rapidly and simultaneously measure the relative angular alignment of machined flat surfaces of a manufactured part. The system can measure p ...


9
Juris Upatnieks: Hologram projector. Environmental Research Institute of Michigan, Krass & Young, November 8, 1977: US04057317 (1 worldwide citation)

A projector for casting the image of a section of an object recorded on a hologram includes a laser for illuminating a section of the hologram and a lens for focusing a section of the reconstructed virtual image on a screen. The hologram is formed as a cylindrical section surrounding the object, on ...


10
Stephen B Segall, Juris Upatnieks: Calibration of reconfigurable inspection machine. Harness Dickey & Pierce, December 30, 2004: US20040263840-A1

A method for calibrating an inspection machine including a plurality of displacement detectors for inspecting a production part and a linear motion stage for relative motion between the displacement detectors and the production part. The method includes determining relative positional errors of the ...