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David Kessler, Rochester US

David Kessler, Rochester, NY US

Patent application numberDescriptionPublished
20080247743ZOOM FLASH WITH LIQUID CRYSTAL LENS - A camera apparatus (10-09-2008
20080304282BACKLIGHT CONTAINING FORMED BIREFRINGENCE REFLECTIVE POLARIZER - A backlight unit comprises: 12-11-2008
20100091236POLARIZED EYEWEAR - An article of polarized eyewear has a lens with a first substrate lens material transparent to visible light and a pattern of elongated structures formed from at least a second material having a complex index of refraction that is deposited onto a curved surface of the first substrate lens material. The pitch between adjacent elongated structures is less than 300 nm and the width of each elongated structure is less than 90% of the pitch.04-15-2010
20100171931LINE ILLUMINATION APPARATUS USING LASER ARRAYS - An illumination apparatus forms, onto a linear array light modulator, a line of illumination that extends in a linear direction. The illumination apparatus has a first laser array with laser emitters for forming a first linear beam array and a second laser array with laser emitters for forming a second linear beam array. An array combiner aligns at least the first and second linear beam arrays in the linear direction and directs the first and second linear beam arrays along a propagation path to form a mixed illumination. At least first and second cylindrical lens elements having power in the linear direction relay the mixed illumination from the propagation path toward the linear array light modulator. At least third and fourth cylindrical lens elements having power in the cross-array direction that is orthogonal to the linear direction focus the mixed illumination onto the linear array light modulator.07-08-2010
20100208319CONCENTRIC AFOCAL BEAM RELAY - An afocal beam relay has a concave reflective surface having a first center of curvature and a first vertex that define an optical axis. A convex reflective surface has a second center of curvature that is substantially coincident with the first center of curvature and a second vertex that lies along the optical axis. The convex reflective surface faces toward the concave reflective surface to relay a decentered entrance pupil to a decentered exit pupil. An aspheric corrector element is disposed in the path of input light that is directed to the decentered entrance pupil and has correction values that are substantially centered on the first center of curvature.08-19-2010
20100271698PUPIL-EXPANDED VOLUMETRIC DISPLAY - A volumetric imaging apparatus has a volumetric image generator with a light source, a light modulator, and a display surface. The volumetric image generator is energizable to form, on the display surface, an image over a range of focal positions at the entrance pupil of an optical system. The optical system is disposed to direct light from the image to a one-dimensional pupil expander. A combiner surface is disposed in the path of output light from the pupil expander for displaying the volumetric image.10-28-2010
20100283957POLARIZED EYEWEAR - An article of polarized eyewear has a lens, with a first substrate lens material transparent to visible light and a pattern of elongated structures formed from at least a second material having a complex index of refraction, wherein the second material is deposited directly onto a curved surface of the first substrate lens material. A pitch between adjacent elongated structures is less than 300 nm and a width of each elongated structure is less than 90% of the pitch. A photochromic material is deposited onto the polarized eyewear.11-11-2010
20100290127HEAD-MOUNTED OPTICAL APPARATUS USING AN OLED DISPLAY - A see-through head-mounted optical apparatus for a viewer has at least one display module, each display module having a display energizable to form an image and a positive field lens optically coupled to the surface of the display and disposed to direct imaged light from the display toward a first surface of a prism. A curved reflector element is in the path of the imaged light through the prism and disposed at a second surface of the prism, opposite the first surface. The curved reflector element has a refractive surface and a curved reflective surface disposed to collimate imaged light received from the display and direct this light toward a beam splitter that is disposed within the prism and that is at an oblique angle to the collimated reflected light. The beam splitter redirects the incident collimated reflected light through the prism to form an entrance pupil for the viewer.11-18-2010

Patent applications by David Kessler, Rochester, NY US