Abstract: Techniques for ephemeral messaging with remote ephemeral mode configuration are described. In one embodiment, an apparatus may comprise a messaging component operative to receive a messaging update at a messaging client on the client device from a messaging system; determine a message thread associated with the messaging update; and determine that the messaging update indicates a transition to an ephemeral mode for the message thread; and a user interface component operative to configure a user interface for the message thread to an ephemeral mode interface based on the transition to the ephemeral mode for the message thread. Other embodiments are described and claimed.

Abstract: In one embodiment, a system may generate a hologram by processing a first image using a machine-learning model. The system may generate a second image based on at least a portion of the hologram using a processing model that is configured to simulate interactions between a light source and the hologram. The system may compare the second image to the first image to calculate a loss based on a loss function. The system may update the machine-learning model based on the loss between the first image and the second image. The updated machine-learning model is configured to process one or more input images to generate one or more corresponding holograms.

Abstract: Head-mounted display systems may include a display subsystem, an optics subsystem, a prescription accommodation subsystem, and a varifocal adjustment subsystem. The prescription accommodation subsystem may include a prescription accommodation actuator that is configured to adjust a focus of a displayed image to account for the user's visual refractive error. The varifocal adjustment subsystem may include a varifocal adjustment actuator configured to further adjust the focus of the image to change a perceived view of the image on the display subsystem. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: The disclosed head-mounted display systems may include an optical element supported by a head-mounted display frame, a projector mounted to the head-mounted display frame, and at least one voice coil actuator mounted on the head-mounted display frame. The projector may be configured to project, via the optical element, an image toward an eye of a user of the head-mounted display system. The at least one voice coil actuator may be coupled to at least one of the projector or the optical element. When actuated, the at least one voice coil actuator may translate at least one of the projector or the optical element in at least one direction relative to the head-mounted display frame. Various other methods, systems, and methods of manufacture are also disclosed.

Abstract: The disclosed computer-implemented method may include accessing content channels available to a user, where each content channel includes a communication space with at least one specified type of content and an audience with various audience members. The method may also include generating a channel overview that provides context information related to the content channels available to the user. The channel overview may include a navigable list of the accessed content channels. The method may further include receiving a selection input indicating that a specified content channel has been selected from the channel overview. The method may also include navigating to the selected content channel from the channel overview. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: A social networking system recommends objects, such as pages, of the social networking system to users of the social networking system based on the location of the user. The social networking system obtains location information identifying the location of the user. Based on the location of the user, the social networking system identifies levels of geographical partitions encompassing the location of the user. For each level of geographical partitions, the social networking system accesses relevant objects of the social networking system with connections to users located within the level of geographical partitions. The social networking system may have determined a term frequency-inverse document frequency (tf-idf) value for each relevant object. Based on the number of connections and the tf-idf value associated with each relevant object, the social networking system merges the relevant objects accessed at each level into a set of relevant objects to recommend to the user.

Abstract: The disclosed wrist-tracking apparatus includes (1) a wristband dimensioned to be donned on a wrist of a user of an artificial reality system and (2) a set of Time of Flight (ToF) sensors coupled to the wristband, wherein each of the ToF sensors comprises (A) an emitter that emits a modulated pulse of energy, (B) a receiver that facilitates detecting a reflection of the modulated pulse of energy, and (C) a processing circuit communicatively coupled to the emitter and the receiver, wherein the processing circuit calculates a time of flight for the modulated pulse of energy based at least in part on the modulated pulse of energy and the reflection. Various other apparatuses, systems, and methods are also disclosed.

Abstract: An optical device includes a first polarization selective reflector; a second polarization selective reflector positioned relative to the first polarization selective reflector so that the first polarization selective reflector directs first light having a first nonplanar polarization toward the second polarization selective reflector and the second polarization selective reflector directs at least a portion of the first light toward the first polarization selective reflector as second light. The optical device includes a first reflector positioned relative to the first polarization selective reflector so that the first polarization selective reflector directs at least a portion of the second light having a second nonplanar polarization toward the first reflector as third light.

Abstract: A controller is formed as an array of transmitting antennas and receiving antennas that are placed on the skin of a user so that the underlying movement of the user's skin can be measured by the interaction of the transmitting antennas and the receiving antennas. In an embodiment, the transmitting antennas and receiving antennas are located in an area proximate to the wrist. The movement of the transmitting antennas and subsequent measurement of signals received by receiving antennas are used in order to determine position and pose of the hand and its digits.

Abstract: An optical device and an eye-tracking system to suppress a rainbow effect are provided. The optical device includes a grating. The grating includes at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract an infrared light beam and transmit a visible light beam with a diffraction efficiency less than a predetermined threshold.

Abstract: Systems, methods, and non-transitory computer-readable media can provide a first interface in which a content feed of a first user is presented. The content feed can include one or more content items that were posted by other users, and the first interface being presented on a display screen of a computing device. A determination is made that the first user has performed at least one operation to scroll a content item included in the content feed, the content item being posted by a second user. A second interface is provided through which at least one content item included in an account feed of the second user is presented. The account feed including one or more content items that were posted by the second user.

Abstract: The disclosed human computer interface (HCI) system may include (1) at least one processor, (2) a plurality of sensors that detect one or more neuromuscular signals from a forearm or wrist of a user, and (3) memory that stores (A) one or more trained inferential models that determine an amount of force associated with the one or more neuromuscular signals and (B) computer-executable instructions that, when executed by the at least one processor, cause the at least one processor to (I) identify the amount of force determined by the one or more trained inferential models, (II) determine that the amount of force satisfies a threshold force value, and in accordance with the determination that the amount of force satisfies the threshold force value, (III) generate a first input command for the HCI system. Various other devices, systems, and methods are also disclosed.

Abstract: An eye is illuminated with light propagating substantially normal to a pupil plane of the eye. Illuminating the eye includes illuminating an ellipsoidal combiner that has a foci at a center of rotation of the eye. The light propagates through the pupil to become incident on the retina.

Abstract: A system and method for generating a virtual content to a physical object is described. A processor includes an augmented reality application. The augmented reality application creates virtual content at the head mounted device, and associates the virtual content with predefined conditions based on data from sensors embedded in the head mounted device at a time of creation of the virtual content. The virtual content is displayed in a display of the head mounted device in response to sensor data satisfying the predefined conditions.

Abstract: Techniques are described for operating a display comprising an array of emitters arranged in at least one column. A data shifting circuit stores digital data or an analog representation thereof in a first storage element. The data shifting circuit outputs the digital data or analog representation multiple times to a display driver circuit, using a multiplexer. The first storage element can be a shift register or a capacitor. Digital data can be internally shifted within the data shifting circuit, through multiple shift registers, prior to output to the display driver circuit. An analog representation can be stored and read from the same capacitor without internal shifting. The display driver circuit drives a different emitter of the column each time. A scanning assembly including a reflective surface that receives light from the emitter array forms an output image by rotating the reflective surface in synchronization with driving of the emitters.

Abstract: A curable liquid is provided to a mold having a rigid surface disposed opposite a deformable surface. The curable liquid contacts the rigid surface and the deformable surface. The deformable surface is shaped according to a surface profile by driving actuators configured to move the deformable surface. The curable liquid is cured while the deformable surface is shaped according to the surface profile.

Abstract: Techniques for fabricating a slanted structure are disclosed. In one embodiment, a method of fabricating a slanted surface-relief structure in a material layer includes forming a thin hard mask on top of an intermediate mask layer, etching the intermediate mask layer at a slant angle using the thin hard mask to form a slanted intermediate mask, and etching the material layer at the slant angle using the slanted intermediate mask to form the slanted surface-relief structure in the material layer. The intermediate mask layer is characterized by an etch rate greater than an etch rate of the material layer.

Abstract: Systems, methods, and non-transitory computer readable media are configured to receive metadata for audio content associated with an audio content item for presentation in a news feed to be displayed on a screen of a computing device associated with a user. The metadata is transformed for display in the audio content item. The transformed metadata is displayed in the audio content item. In addition, systems, methods, and non-transitory computer readable media are configured to present an audio content item in a news feed to be displayed on a screen of a computing device associated with a user. An input by the user for scrolling the news feed and the audio content item on the screen is received. A pop out player is presented in response to disappearance of the audio content item from the screen based on the scrolling.

Abstract: Exemplary embodiments relate to improvements in the design of a messaging inbox. The inbox may display different units or “modules” for providing a user with quick access to different inbox functionalities. After a number of recent or unread messages are shown in the inbox's initial interface, the messages end and are replaced with modules. In some embodiments, promotional material may be integrated into a module, or may be integrated as a module. For example, a new message thread may be created to indicate a store in which a discount is offered. The message may appear in a module, or may stand in the place of a module. The promotional material may be selected based on proximity. The messaging service may differentiate between sponsored materials advertising a product or service, and purely beneficial materials such as coupons.