A single-ended output circulator includes a three-core optical fiber head having first, second, and third optical fiber cores; a walk-off crystal having a first surface facing towards the second end of the three-core optical fiber head tube and a second surface facing away from the second end of the three-core optical fiber head tube; a plurality of half-wave plates each having a first surface coupled to the second surface of the walk-off crystal and a second surface facing away from the second surface of the walk-off crystal; a collimating lens having a first end and a second end; a reflection mirror configured to reflect light beams from the collimating lens; an optical prism between the collimating lens and the reflection mirror and configured to transmit a light beam along a propagation direction according to a polarization direction of the light beam; and a polarization rotator.

A backlight module includes a light guide plate, a light source, multiple first optical microstructures, and multiple second optical microstructures. The first optical microstructures and the second optical microstructures are disposed on the bottom surface of the light guide plate. Each of the first optical microstructures has a first light receiving surface facing the light source.

Each of the second optical microstructures has a second light receiving surface facing the light source. A first angle is included between the first light receiving surface and the bottom surface. A second angle is included between the second light receiving surface and the bottom surface. The second angle is different from the first angle. A display apparatus adopting the backlight module is also provided.

Embodiments are disclosed for providing a silicon photonics collimator for wafer level assembly. An example apparatus includes a silicon photonics (SiP) device and a micro-optical passive element. The SiP device comprises a set of optical waveguides. The micro-optical passive element is mounted on an edge of a cavity etched into a silicon surface of the SiP device. Furthermore, the micro-optical passive element is configured to direct optical signals between the set of optical waveguides and an external optical element.

Provided is a sunlight lighting system used in a greenhouse or a plant factory. The sunlight lighting system converts sunlight into light with a stable illumination direction and a controllable illumination intensity by means of a combination of a controller, a light condenser, a main driving mechanism and an illuminator, so that the sunlight lighting system meets lighting requirements of high-density stereoscopic cultivation frames. A supporting greenhouse is further comprised, where a facade or a top is provided with a light through hole. A main optical axis of the sunlight lighting system passes through the light through hole. A supporting lighting method is further comprised, which can obtain a better lighting effect with fewer steps.

A lamp for a vehicle includes a light source configured to emit light; a light guide provided in front of the light source and into which the light is incident; and a heat dissipation unit provided in close contact with one side of the light guide. The light guide includes a first recessed region formed on a bottom surface of the light guide and having an upward recessed shape, and the heat dissipation unit is provided in close contact with the first recessed region.

The present disclosure includes a first optical member (light-guiding member) and a second optical member (light-guiding member) that are included in a first display device and a second display device configured to display images corresponding to left and right eyes and are configured to guide the images, a central member serving as a coupling member configured to couple these light-guiding members, and a protruding portion provided on the central member and extending in a lateral direction (±X direction) in which these light-guiding members are aligned.

An optical device comprises a waveguide plate comprising an entrance pupil grating unit, a left pupil-expanding grating unit, and a right pupil-expanding grating unit. The left and right pupil-expanding grating units are bilaterally symmetric, and left and right exit pupil grating units are bilaterally symmetric. An input light is diffracted by the entrance pupil grating unit to form a first left guided light and a first right guided light, the first left guided light is diffracted by the left pupil-expanding grating unit to form a second left guided light, and the first right guided light is diffracted by the right pupil-expanding grating unit to form a second right guided light. The second left guided light is diffracted by the left pupil-expanding grating unit to form a left output light, and the second right guided light is diffracted by the right pupil-expanding grating unit to form a right output light.

A light fixture delivering electrically controlled lighting distributions for mounting within an installed panel system typically used in ceiling and wall constructions and incorporating acoustic, drywall or wood panels. The light fixture can provide low-glare or wide spread “batwing” ambient light or more directional wall wash, task and accent lighting. The light fixture comprises one or more LED boards and an optical element which can be back-lit or edge-lit. The light fixture body is configurable, comprising a 3-dimensional extruded elongate body with its ends cut at a configured angle. The body typically comprises additional side support features that support and enclose the edge of installed panels. In the case of a T-bar based ceiling grid system the side support features may also replicate the function and appearance of T-bar horizontal and vertical portions. The body comprises features to retain and align LED boards, reflectors and a back-lit or edge-lit optical element. In the edge-lit configuration the optical element may also be a light guide. The edge-lit design also enables the height of the lighting assembly body to be equivalent to or less than the height of T-bar main beams or cross tees. This is very important in applications where there is zero or little available plenum space above the ceiling grid. Because the lighting assembly can also provide structural support within the installed panel system it can replace one or more T-bars and can also be used to connect one or more T-bars or other structural grid elements. The lighting fixture can be mounted at an oblique or diagonal angle to the typical square grid layouts, or in a corner of a ceiling grid T-bar cell at the intersection of one or more T-bars. Additionally, more than one elongate bodies can be connected to form square, crosses, curves or arcs or more complex shapes. The electrical power may additionally be configured to control lighting distributions of the fixtures independently of one another.

An optical member includes a light guide body. The light guide body has an incident surface on which an outside light is incident, a first surface having flat portions and prism portions, an incident light incident on the incident surface reaching the first surface for the first time, and a second surface arranged opposite to the flat portions. The flat portions totally reflect the incident light toward the second surface. The second surface totally reflects a reflected light reflected by the flat portion toward the first surface. The prism portion has an ejection surface to emit the incident light to outside.

Provided is a fixture including a base; and a light guide, which is positioned on the base and is configured to receive light emitted from a light source in a first direction and guide the received light to be emitted in a second direction crossing the first direction.