Light field generator devices with opposed saw modulators

Inactive Publication Date: 2018-10-04
CHARLES STARK DRAPER LABORATORY
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about a way to reduce interference between neighboring optical modulators by using a special material that reduces the "crosstalk" of SAW (semiconductor acoustic waves). This material is placed between the modulators to minimize the impact of this interference and improve the overall performance of the optical system.

Problems solved by technology

So far, displays built on this technology have not achieved this theoretical level of performance.
This causes at least some of the light to change from a guided mode within the waveguide to a leaky mode that exits the waveguide.
Practical electronic constraints and materials properties often limit the resulting angular deflection of SAW devices.
But it does not appear that any of these are adequate to achieve an angle fan as high as 90° in any sort of flat form-factor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light field generator devices with opposed saw modulators
  • Light field generator devices with opposed saw modulators
  • Light field generator devices with opposed saw modulators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047]The invention now will be described more fully hereinafter with reference to the accompanying drawings, in which illustrative embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0048]As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Further, the singular forms and the articles “a”, “an” and “the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms: includes, comprises, including and / or comprising, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not pre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An electro-holographic light field generator device comprises surface acoustic wave (SAW) optical modulators arranged in different directions. Specifically, some embodiments have SAW modulators arranged in pairs, nose-to-nose with each other, and have output couplers that provide face-fire light emission. These SAW modulators also possibly include SAW sense transducers and / or viscoelastic surface material to reduce crosstalk.

Description

RELATED APPLICATIONS[0001]This application claims the benefit under 35 USC 119(e) of U.S. Provisional Application No. 62 / 477,511, filed on Mar. 28, 2017, which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]A number of proposed autostereoscopic (naked-eye) 3D displays or, more broadly, light field generator architectures utilize a variety of scanning, diffraction, space-multiplexing, steered illumination, and other techniques. One category, electro-holographic displays, relies principally on diffractive phenomena to shape and steer light. Examples of electro-holographic displays are described in: Jason Geng, Three-dimensional display technologies, Advances in Optics and Photonics, 5, 456-535 (2013). (see pp. 508-516) and Yijie Pan et al., A Review of Dynamic Holographic Three-Dimensional Display: Algorithms, Devices, and Systems, IEEE Transactions on Industrial Informatics, 12(4), 1599-1610 (August 2016). Electro-holographic light field generato...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02F1/335G02B27/22
CPCG02F1/335G02B27/225G02F2201/302G02F2201/34G02F2203/22G02B6/12007G02F1/0353G02F1/125G02F2201/05G02F2201/18G02F2203/023G02F2203/07G02F2203/24G02F2203/28G02F2203/58G03H1/02G03H1/2294G03H2001/0224G03H2001/2292G03H2223/16G03H2223/17G03H2225/11G03H2225/21G03H2225/34G03H2225/36G03H2225/55G10K11/002G10K11/178G10K11/36G10K11/17873G10K11/17875G02B6/0045G02B6/005G02B6/0078G02B6/105G02B6/12004G02B2006/0098G02B2006/12085G02B2006/12104G02B2006/12107
Inventor REGISTER, JOSEPH J.CALLAHAN, DENNIS M.MOEBIUS, MICHAEL G.BYRNES, STEVEN J.FAVALORA, GREGG E.FRANK, IAN W.
Owner CHARLES STARK DRAPER LABORATORY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap