Francesco Aieta

20130208332, Aug 15, 2013

Mar 15, 2013

13/832403

Nanfang Yu - New York NY, US
Federico Capasso - Cambridge MA, US
Zeno Gaburro - Trento, IT
Patrice Genevet - Cambridge MA, US
Mikhail Kats - Cambridge MA, US
Francesco Aieta - Cambridge MA, US

President and Fellows of Harvard College - Cambridge MA

G02F 1/01

359240, 977774, 977773

An optical plate includes a substrate and a resonator structure formed on or in the substrate, wherein the resonator structure is configured to produce an abrupt change in phase, amplitude and/or polarization of incident radiation.

20230107214, Apr 6, 2023

Dec 12, 2022

18/079187

- Menlo Park CA, US
Xuejian Li - Menlo Park CA, US
Francesco Aieta - Menlo Park CA, US

G02B 27/10
G02B 5/18
F21V 8/00

A static multiview display and method of static multiview display operation provide a static multiview image using diffractive gratings to that encode pixels of the static multiview image. The static multiview display includes a light guide configured to guide plurality of guided light beams and a light source configured to provide the guided light beam plurality having the different radial directions. The static multiview display further includes a plurality of diffraction gratings configured to provide different individual directional light beams from a portion of the radially directed guided light beams. The different individual directional light beams having different intensities and directions corresponding to and representing different view pixels of the static multiview image.

20200386937, Dec 10, 2020

Aug 21, 2020

17/000107

- Menlo Park CA, US
David A. Fattal - Mountain View CA, US
Francesco Aieta - Menlo Park CA, US
Ming Ma - Palo Alto CA, US

F21V 8/00
G02B 27/30
G02B 27/09

A static multiview display and method employ an array of diffraction gratings to provide a multiview image having a direction that is a function of both color and a propagation angle of a collimated guided light beam. The static multiview display includes a light guide configured to guide light in a longitudinal direction and a light source configured to provide the collimated guided light beam, the propagation angle within the light guide being determined by a longitudinal offset of an optical emitter of the light source. The static multiview display further includes the array of diffraction gratings are configured to scatter out a portion of the collimated guided light beam as a plurality of directional light beams representing the multiview image.

20200232924, Jul 23, 2020

Apr 2, 2020

16/838662

- Spring TX, US
James William STASIAK - Palo Alto CA, US
Francesco AIETA - Palo Alto CA, US
Anita ROGACS - San Diego CA, US
Mineo YAMAKAWA - Palo Alto CA, US
Kenneth WARD - Corvallis OR, US

G01N 21/65

Optical readers are disclosed in examples herein. An example optical reader including a light source to emit a light beam; and a spot pattern generator to receive the light beam and to generate a two-dimensional spot array from the light beam, the two-dimensional spot array to be directed toward a substrate having nanostructures, the two-dimensional spot array to be sensed to detect a presence or an absence of a substance of interest on the substrate.

20200218011, Jul 9, 2020

Mar 18, 2020

16/822795

- Menlo Park CA, US
David A. Fattal - Mountain View CA, US
Francesco Aieta - Menlo Park CA, US

G02B 6/293
F21V 8/00

A grating-coupled light guide concentrates light and diffractively redirects the concentrated light at a non-zero propagation angle as guided light having a predetermined spread angle. The grating-coupled light guide includes a light guide, an optical concentrator, and a grating coupler. The optical concentrator is configured to concentrate light from a light source as concentrated light and the grating coupler is configured to diffractively redirect the concentrated light into the light guide as the guided light. Characteristics of the optical concentrator and grating coupler are configured in combination to determine the non-zero propagation angle and predetermined spread angle. A grating-coupled display system further includes an array of light valves configured to modulate emitted light as a displayed image.

20200192101, Jun 18, 2020

Dec 12, 2019

16/712767

- Cupertino CA, US
Kenneth E. Anderson - Longmont CO, US
Adam C. Urness - Louisville CO, US
Friso Schlottau - Lyons CO, US
Byron R. Cocilovo - Sunnyvale CA, US
Francesco Aieta - San Francisco CA, US

G02B 27/01
F21V 8/00

A device including a waveguide having a first waveguide surface and a second waveguide surface parallel to the first waveguide surface is disclosed. The device may include a first volume holographic light coupling element disposed between the first waveguide surface and the second waveguide surface. The first volume holographic light coupling element may be structured to reflect at least a portion of incident light as reflected light. Incident light for which the first volume holographic light coupling element is structured to reflect may have a first angle of incidence within a total internal reflection (TIR) range with respect a first axis corresponding to a surface normal of the waveguide. Incident light for which the first volume holographic light coupling element is structured to reflect may have a second angle of incidence with respect to a second axis different from the first axis.

20200096771, Mar 26, 2020

Aug 13, 2019

16/539818

- Cupertino CA, US
Bradley C. Steele - San Diego CA, US
Byron R. Cocilovo - San Jose CA, US
Francesco Aieta - San Francisco CA, US
Graham B. Myhre - San Jose CA, US

G02B 27/01
G02B 27/09
G02B 5/18
G02B 5/32
G02B 5/08

An electronic device may include a display that produce images. The display may generate light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide that propagates the light in a first direction towards the output coupler. The output coupler may couple the light out of the waveguide towards the eye box while inverting a parity of the light about the first direction. The coupler may include a first element such as a set of partial mirrors or diffractive gratings that redirects a first portion of the light in a second direction. The coupler may include a second element that redirects a second portion of the light in a third direction opposite the second direction. The first element may redirect the second portion and the second element may redirect the first portion towards the eye box.

20200089014, Mar 19, 2020

Aug 20, 2019

16/546157

- Cupertino CA, US
Eric J. Hansotte - Morgan Hill CA, US
Francesco Aieta - San Francisco CA, US
Graham B. Myhre - San Jose CA, US
Hyungryul Choi - San Jose CA, US
Nan Zhu - San Jose CA, US
Se Baek Oh - Millbrae CA, US
Scott M. DeLapp - Sunnyvale CA, US
Bradley C. Steele - San Diego CA, US

G02B 27/14
G02B 27/12
G02B 27/01

An electronic device may have a display that emits image light, a waveguide, and an input coupler that couples the image light into the waveguide. Beam splitter structures may be embedded within the waveguide. The beam splitter structures may partially reflect the image light multiple times and may serve to generate replicated beams of light that are coupled out of the waveguide by an output coupler. The beam splitter structures may replicate the beams across two dimensions to provide an eye box with uniform-intensity light from the display across its area. The beam splitter structures may include stacked partially reflective beam splitter layers, sandwiched transparent substrate layers having different indices of refraction, a thick volume hologram interposed between substrate layers, or combinations of these or other structures. The reflectivity of the beam splitter structures may vary discretely or continuously across the lateral area of the waveguide.