Abstract: Disclosed embodiments are related to ventilation-based air purification systems, wherein an air purification system generates an air barrier system for an enclosed space. The air purification system provides air barriers between individuals by controlling the air flow between the individuals to prevent passengers' from breathing droplet media/aerosols exhaled by other individuals. Other embodiments may be disclosed and/or claimed.

Abstract: Disclosed embodiments are related to an optical system of an augmented reality (AR) head-up display (HUD) devices. The implementation of disclosed optical system in AR HUD devices improves visual ergonomics by providing enhanced stereoscopic depth of field (SDoF). The SDoF is created by the formation of a proper shape and spatial orientation of a virtual image surface (VIS) where a convex side is oriented towards a user or observer. When such optical systems of AR HUD devices are implemented in a vehicle, the improved visual ergonomics provides improved driving comfort and safety.

Abstract: An optical system includes a picture generation unit (PGU), a correcting optical unit configured to create, in a direction of a horizontal field of view (HFoV), a monotonic variation of an optical path length of light rays propagating from the PGU, and a combiner configured to redirect light rays propagating from the correcting optical unit toward an eye box, producing one or more virtual images observable from the eye box. The optical system provides a virtual image surface inclined in the direction of the HFoV for displaying the virtual images. The virtual image surface has a non-zero angle between projections on a horizontal plane defined by a first axis perpendicular to the virtual image surface and extending through an arbitrary intersection point on the virtual image surface, and a second axis parallel to a line of sight and extending from the eye box through the intersection point.

Abstract: Devices for applying vibration and/or sliding motion to speckle diffusers are provided. A speckle diffusion device comprises at least one speckle diffuser element, one free form torsion spring with an axis of rotation, and at least one actuator. One end of the torsion spring includes an interaction element to interact with the actuator. The actuator actuates motion of the speckle diffusion element via the interaction element attached to the spring. The spring may also limit motion of the speckle diffuser element. The speckle diffusion device may be implemented or employed in various optical systems/devices. The speckle diffusion device may be easily adapted to accommodate various systems with various dimensions and geometry. Other embodiments may be disclosed and/or claimed.

Abstract: Devices for applying vibration and/or sliding motion to speckle diffusers are provided. A speckle diffusion device comprises at least one speckle diffuser element, one free form torsion spring with an axis of rotation, and at least one actuator. One end of the torsion spring includes an interaction element to interact with the actuator. The actuator actuates motion of the speckle diffusion element via the interaction element attached to the spring. The spring may also limit motion of the speckle diffuser element. The speckle diffusion device may be implemented or employed in various optical systems/devices. The speckle diffusion device may be easily adapted to accommodate various systems with various dimensions and geometry. Other embodiments may be disclosed and/or claimed.

Abstract: The present disclosure refers to a method for producing a laminated holographic display comprising the following steps; providing a display precursor, wherein the display precursor comprises a first glass layer, a second glass layer, an unrecorded photopolymer film layer, which is arranged between the first glass layer and the second glass layer, and a polymer film layer, which is arranged between the unrecorded photopolymer film layer and the second glass layer, wherein the providing step is performed in the absence of ambient light; laminating the display precursor to obtain a display laminate, wherein the laminating step is performed in the absence of ambient light; and recording a hologram in the display laminate by applying a light beam to the unrecorded photopolymer film layer of the display laminate to obtain a recorded photopolymer film layer comprising the hologram, wherein the recording step is performed in the absence of ambient light.

Abstract: Devices for applying vibration and/or sliding motion to speckle diffusers are provided. A speckle diffusion device comprises at least one speckle diffuser element, one free form torsion spring with an axis of rotation, and at least one actuator. One end of the torsion spring includes an interaction element to interact with the actuator. The actuator actuates motion of the speckle diffusion element via the interaction element attached to the spring. The spring may also limit motion of the speckle diffuser element. The speckle diffusion device may be implemented or employed in various optical systems/devices. The speckle diffusion device may be easily adapted to accommodate various systems with various dimensions and geometry. Other embodiments may be disclosed and/or claimed.

Abstract: A heads up display system with a variable focal plane includes a projection device to generate light representative of at least one virtual graphic, an imaging matrix to project the light representative of the at least one virtual graphic on at least one image plane, a display device to display the at least one virtual graphic on the at least one image plane, and a translation device to dynamically change a position of the imaging matrix relative to the display device based, at least in part, on a predetermined operational parameter to dynamically vary a focal distance between the display device and the at least one image plane.

Abstract: The present disclosure refers to a method (200) for producing a laminated holographic display (100) comprising the following steps; providing (201) a display precursor (100-1), wherein the display precursor (100-1) comprises a first glass layer (113), a second glass layer (115), an unrecorded photopolymer film layer (117, 117-1), which is arranged between the first glass layer (113) and the second glass layer (115), and a polymer film layer (119), which is arranged between the unrecorded photopolymer film layer (117, 117-1) and the second glass layer (115), wherein the providing step (201) is performed in the absence of ambient light; laminating (203) the display precursor (100-1) to obtain a display laminate (100-2), wherein the laminating step (203) is performed in the absence of ambient light; and recording (205) a hologram (111) in the display laminate (100-2) by applying a light beam to the unrecorded photopolymer film layer (117, 117-1) of the display laminate (100-2) to obtain a recorded photopolymer f

Abstract: A heads up display system with a variable focal plane includes a projection device to generate light representative of at least one virtual graphic, an imaging matrix to project the light representative of the at least one virtual graphic on at least one image plane, a display device to display the at least one virtual graphic on the at least one image plane, and a translation device to dynamically change a position of the imaging matrix relative to the display device based, at least in part, on a predetermined operational parameter to dynamically vary a focal distance between the display device and the at least one image plane.