Holographic optical element and production method
AssigneeRobert Bosch GmbH
InventorsReinhold Fiess, Tobias Wilm
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Abstract
A holographic optical element (HOE). The HOE includes a hologram, and an electroactive polymer (EAP), in particular a dielectric elastomer actuator (DEA). The electroactive polymer includes at least one elastomer layer, in particular an elastomer film, arranged between two electrodes, and the hologram is applied to an electrode of the electroactive polymer. The hologram or a holographic function which can be provided by means of the hologram, and in particular diffraction properties of the hologram, can be adapted by means of a controllable deformation of the electroactive polymer. A method for producing such a holographic optical element is also described.
Claims12
A method for producing a holographic optical element (HOE), comprising:
- providing at least one hologram with a diffraction grating in a volume of at least one holographic film;
- and
- applying the hologram to at least one electroactive polymer (EAP) including a dielectric elastomer actuator (DEA), wherein the electroactive polymer includes at least one elastomer layer arranged between two electrodes, the elastomer layer including an elastomer film, and the hologram is directly affixed to an electrode of the electrodes of the electroactive polymer such that a mechanical deformation of the electroactive polymer causes a corresponding deformation of the hologram.
A holographic optical element (HOE), comprising:
- a hologram;
- and
- an electroactive polymer (EAP) including a dielectric elastomer actuator (DEA), wherein the electroactive polymer includes at least one elastomer layer arranged between two electrodes, the elastomer layer including an elastomer film, and wherein the hologram is directly affixed to an electrode of the electrodes of the electroactive polymer such that a mechanical deformation of the electroactive polymer causes a corresponding deformation of the hologram, and wherein the hologram or a holographic function which can be provided using the hologram including diffraction properties of the hologram, can be adapted using a controllable deformation of the electroactive polymer.
A method for using a holographic optical element, the holographic optical element including:
- a hologram, and
- an electroactive polymer (EAP) including a dielectric elastomer actuator (DEA), wherein the electroactive polymer includes at least one elastomer layer arranged between two electrodes, the elastomer layer including an elastomer film, and wherein the hologram is directly affixed to an electrode of the electrodes of the electroactive polymer such that a mechanical deformation of the electroactive polymer causes a corresponding deformation of the hologram, and wherein the hologram or a holographic function which can be provided using the hologram including diffraction properties of the hologram, can be adapted using a controllable deformation of the electroactive polymer, the method comprising:
- controlling the elastomer layer of the electroactive polymer and/or controlling a plurality of independently controllable regions of the elastomer layer of the electroactive polymer, to provide one or more of the following functions in the hologram of the holographic optical element:
- a) varying a playback angle of the holographic function of the hologram,
- b) varying a playback wavelength of the holographic function of the hologram,
- c) shifting a focal point of the holographic function of the hologram,
- d) modulating a wavefront of the holographic function of the hologram.
A sensor device configured to detect backscattered light, comprising:
- at least one optical element including a filter element and/or a deflection element;
- wherein the optical element includes a holographic optical element which include:
- a hologram, and
- an electroactive polymer (EAP) including a dielectric elastomer actuator (DEA), wherein the electroactive polymer includes at least one elastomer layer arranged between two electrodes, the elastomer layer including an elastomer film, and wherein the hologram is directly affixed to an electrode of the electrodes of the electroactive polymer such that a mechanical deformation of the electroactive polymer causes a corresponding deformation of the hologram, and wherein the hologram or a holographic function which can be provided using the hologram including diffraction properties of the hologram, can be adapted using a controllable deformation of the electroactive polymer.
A display device including data glasses or a display, the display device comprising:
- at least one optical element, wherein the optical element including a holographic optical element which includes:
- a hologram, and
- an electroactive polymer (EAP) including a dielectric elastomer actuator (DEA), wherein the electroactive polymer includes at least one elastomer layer arranged between two electrodes, the elastomer layer including an elastomer film, and wherein the hologram is directly affixed to an electrode of the electrodes of the electroactive polymer such that a mechanical deformation of the electroactive polymer causes a corresponding deformation of the hologram, and wherein the hologram or a holographic function which can be provided using the hologram including diffraction properties of the hologram, can be adapted using a controllable deformation of the electroactive polymer;
- wherein the holographic optical element is configured to provide the holographic function.
Dependencies are inferred from the claim text.