Abstract: System for free-space light coupling between 2-dimensional light transmitter and receiver arrays using flat optics. The system includes: a transmitter array configured to emit one or more light beams; a first flat optic configured to receive the light beams from the transmitter array and generate one or more intermediate light beams; a first spacer disposed between the light transmitter array and the first flat optic; a receiver array; a second flat optic configured to receive the intermediate light beams and generate one or more output light beams toward the receiver array; and a second spacer disposed between the second flat optic and the light receiver array. The TX and RX portions of the light coupling system may be used in LiDAR systems as the light emitter (beam steerer) and detector, respectively. The flat optics are configured to provide a wide field of view for the LiDAR.

Abstract: A wide field-of-view sensor or projector includes a transparent substrate with one or more apertures on one side, and one or more chip stacks joined to the opposite side. Each chip stack includes a flat optics layer (e.g., metasurface), at least one spacer layer, an optional filter layer, and either an image sensor or a light source. In one example, two apertures and two corresponding chip stacks are provided; both chip stacks include image sensors but different metasurfaces and filters to capture different information from the scene. In an alternative embodiment, the two chip stacks include a light source and an image sensor, to function as a light projector and a light receiver, respectively. In other examples, two apertures and a single chip stack are provided, where the single chip stack include two metasurface and/or two filters corresponding to the two apertures.

Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.

Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.

Abstract: The present invention relates to a polyimide film and a preparation method thereof. According to the present invention, a polyamic acid solution having a high weight-average molecular weight may be obtained by adjusting viscosity and solid content of the polyamic acid solution, and thus, a desired polyimide film may be prepared therefrom. Furthermore, since a length of carbon chains rearranged during graphitization is increased, a graphite sheet having excellent thermal conductivity can be prepared from the polyimide film of the present invention. Also, since the polyimide film has improved windability by further including inorganic particles as a filler, it may facilitate the wind operation.

Abstract: Caps for milk or juice bottles having four screw threads with serrations. The matching threads on the containers also display serrations. The serrations on the caps and the bottles engage each other to prevent their relative rotation to prevent the opening of the closure. An applicator places the cap onto the bottles by first twisting the caps in the reverse direction to properly seat them on the bottle necks. It then reverses the direction to start the closure. The applicator first holds the cap at an angle relative to the horizon and the direction in which the bottles move on a conveyor. As a bottle moves on the conveyor, it engages the lower, tilted edge of the cap. The bottle moving on the conveyor and in contact with the cap overcomes the tension, created by gravity, holding the cap from its location where it awaited the arrival of a bottle.