Abstract: The present disclosure describes a sensor comprising a first transmitter, a second transmitter, and a receiver. The first transmitter may be configured to emit first light via a first diffractive or refractive material, and the second transmitter may be configured to emit second light via a second diffractive or refractive material. The first diffractive or refractive material and/or the second diffractive or refractive material may be configured to deflect and/or shape light to focus the light in a detection zone. Light reflected by an intended target may be received (e.g., detected) by the receiver. Upon detecting a target, the sensor may cause a device to perform an action. The sensor may be deployed in a plurality of devices, including Internet-of-Things (IoT) devices that have WiFi capabilities. The WiFi capabilities may comprise a bridge-less architecture that allows the IoT devices to communicate with cloud services for remote monitoring purposes.

Abstract: Multiple pairs of substrate-guided wave-based holograms (SGWHs) are laminated to a common thin substrate to form a transparent substrate-guided wave-based holographic CHMSL (SGWHC) that diffracts playback LED illumination over a wide angular range. This device is made pursuant to a technique that includes the steps of recording a first set of SGWHs with one setup, that upon playback, will couple and guide the diffracted light inside the substrate, and a second set of SGWHs recorded with another setup, that will diffract and couple the guided light out.

Abstract: Multiple pairs of substrate-guided wave-based holograms (SGWHs) are laminated to a common thin substrate to form a transparent substrate-guided wave-based holographic CHMSL (SGWHC) that diffracts playback LED illumination over a wide angular range. This device is made pursuant to a technique that includes the steps of recording a first set of SGWHs with one setup, that upon playback, will couple and guide the diffracted light inside the substrate, and a second set of SGWHs recorded with another setup, that will diffract and couple the guided light out.

Abstract: Multiple pairs of substrate-guided wave-based holograms (SGWHs) are laminated to a common thin substrate to form a transparent substrate-guided wave-based holographic CHMSL (SGWHC) that diffracts playback LED illumination over a wide angular range. This device is made pursuant to a technique that includes the steps of recording a first set of SGWHs with one setup, that upon playback, will couple and guide the diffracted light inside the substrate, and a second set of SGWHs recorded with another setup, that will diffract and couple the guided light out.