Disclosed are a projection module, a structured light three-dimensional imaging device, and an electronic apparatus. The projection module includes a laser emitter and a reflective grating. The laser emitter includes a light emitting surface from which laser light is emitted. The reflective grating includes a reflecting surface arranged obliquely relative to the light emitting surface and opposite to the light emitting surface. The reflective face is provided with a grating microstructure thereon. The projection module can adjust a reflection angle of the laser light when expanding beams to generate a laser pattern.

An optical sensing device adopted to use structured light to detect an object is provided. The optical sensing device includes a structured light projector and a sensor. The structured light projector includes a light source and at least one beam multiplication film. The light source is configured to emit a light beam. The at least one beam multiplication film is disposed on a transmission path of the light beam and is made of anisotropic refractive index material, wherein a plurality of separated light beams are produced after the light beam from the light source passes through the at least one beam multiplication film, so as to form the structured light. The sensor is configured to sense the structured light reflected from the object. Besides, a structured light projector is also provided.

Techniques are described for reducing the number of angles needed in structured illumination imaging of biological samples through the use of patterned flowcells, where nanowells of the patterned flowcells are arranged in, e.g., a square array, or an asymmetrical array. Accordingly, the number of images needed to resolve details of the biological samples is reduced. Techniques are also described for combining structured illumination imaging with line scanning using the patterned flowcells.

Techniques disclosed herein relate generally to eye-tracking in near-eye display systems. One example of an eye illuminator for eye-tracking includes a substrate transparent to visible light, an array of light sources immersed in the substrate and configured to emit infrared light, and a holographic optical element conformally coupled to a surface of the substrate and encapsulated by an encapsulation layer. The holographic optical element is configured to transmit the visible light and diffract the infrared light emitted by the array of light sources to the eye of a user for eye-tracking.

The optical component includes a first substrate, a first diffractive layer formed on the first substrate, a second substrate, a second diffractive layer formed on the second substrate, and a bonding material disposed between the first substrate and the second substrate and connecting the first substrate and the second substrate. The second diffractive layer is disposed opposite to the first diffractive layer, and both the first diffractive layer and the second diffractive layer are located between the first substrate and the second substrate. A gap is formed between the first diffractive layer and the second diffractive layer.

An IV line identification system to enable ready identification of an IV line and its associated fluid source and output from other IV lines with their fluid sources and outputs. The IV line identification system includes an optical member fixed to elongated member that emits light when a light source provides a light into the optical member.

A light-diffusing layer is provided for diffusing incident light by diffracting at least a portion of the incident light, and the diffuse light diffused by the light-diffusing layer is diffused about a direction different from the emission direction of non-diffused light that passes through the light-diffusing layer without being diffused.

Techniques are described for reducing the number of angles needed in structured illumination imaging of biological samples through the use of patterned flowcells, where nanowells of the patterned flowcells are arranged in, e.g., a square array, or an asymmetrical array. Accordingly, the number of images needed to resolve details of the biological samples is reduced. Techniques are also described for combining structured illumination imaging with line scanning using the patterned flowcells.

A laser navigational system for a vehicle having a lighting assembly configured for emission of light. A lens array assembly receives incoming light from the lighting assembly and changes the direction of the incoming light received from the lighting assembly such that the outgoing light emanating from the lens array assembly is collimated in a first direction but diverges along a different, second direction. A scanning unit aligns with the lighting assembly to direct the collimated beam in two orthogonal directions. The lighting assembly, the lens array assembly and the scanning unit are configured to direct the light to form a visual beacon that guides navigation of the vehicle to a location.

Structured light systems for three dimensional imaging are provided with a pulsed light source, an imaging sensor and an infrared band-pass filter to selectively pass filtered light to the imaging sensor, as well as a global shutter to control exposure of the imaging sensor to light.