Abstract: A laser machining device for forming dots on a substrate includes a light-combining assembly having a first reflection surface and a second reflection surface, a first laser source module, and a second laser source module. The first laser source module emits a first laser beam to the first reflection surface along a first light path. The second laser source module emits a second laser beam to the second reflection surface along a second light path. The light-combining assembly combines the reflected first and second laser beams into a third laser beam to focus on the substrate. The light-combining assembly is moveable between the first laser source module and the second laser source module. The second laser source module is fixed relative to the first laser source module, such that a sum of the length of the first light path and the length of the second light path is maintained constant.

Abstract: A light ray concentration device includes a concentrating lens and a base for holding the concentrating lens. The concentrating lens includes a planar surface defining a number of first Fresnel zones and a convex surface facing away from the planar surface and defining a number of second Fresnel zones. The first and second Fresnel zones are coaxial with each other.

Abstract: An LED includes an LED chip, a first package configured for packaging the LED chip, the first package including a flat first surface, and a second package including a second surface opposing the first surface. A micro-structure is defined in the second surface and protruding toward the first surface. A gap is maintained between the first and second surfaces. The gap is filled with a filler, and the refractive index of the filler is smaller than that of the first and second packages. Light generated by the LED chip radiates first through the first package, then the gap and the micro-structure, thereafter the second package to finally reach an outside of the LED. A light module including the LED is also provided.

Abstract: An exemplary apparatus for manufacturing a light guide film having patterns simultaneously formed on two opposite surfaces thereof, includes a first conveyor roller, a second conveyor roller, a imprinting group roller, two coating devices, two solidifying devices, a first template and a second template. The imprinting group rollers are positioned between the first and second conveyor rollers, including a first imprinting roller and a second imprinting roller opposite to the first imprinting roller. The two coating devices are positioned between the first conveyor roller and the imprinting group roller. The two solidifying devices are positioned between the imprinting group rollers and the second conveyor roller. The first template has a first imprinting pattern, and is fixed on a circumferential surface of the first imprinting roller. The second template has a second imprinting pattern, and is fixed on a circumferential surface of the second imprinting roller.

Abstract: An LED backlight module includes at least one LED and a light guide plate. The light guide plate includes a light incident surface, a light emitting surface connected to the light incident surface, and a bottom surface parallel to the light emitting surface. The at least one LED is placed on the light incident surface and spaced at regular intervals. The light from the at least one LED enters the light guide plate from the light incident surface and is reflected to the light emitting surface by the bottom surface. The light guide plate defines a plurality of concave dots on the bottom surface. The bottom surface is divided into a plurality of discontinuous dot zones. In the dot zone closest to the incident surface, proximity of the dot to the LED decreases the depth and the distribution density of the dots.

Abstract: An exemplary radio frequency identification tag antenna includes a substrate and a patterned carbon nanotube layer. The patterned carbon nanotube layer is formed on the substrate. The carbon nanotube layer consists of a number of carbon nanotube segments. The carbon nanotube segments are connected end-to-end and well aligned. Each carbon nanotube segment includes a number of carbon nanotubes substantially parallel to each other.

Abstract: An image scanner includes a light-pervious supporting plate, an enclosure, an image sensor, several light sources, and two or four light guide plates. The supporting plate supports an original to be scanned. The enclosure and the supporting plate cooperatively define a receiving space. The image sensor is received in the receiving space, and has a receiving surface. The two, four, or six light sources emit light. The light guide plates each include a light incident surface and an output surface. The light incident surface is configured for receiving light from the respective light sources. The output surface is configured for emission of surface light to scan the original on the supporting plate. In this manner, the surface light is reflected by the original to the receiving surface of the image sensor, thus an image of the original is captured.

Abstract: A method for manufacturing a Fresnel lens includes the flowing steps: a. providing a mixture for forming the Fresnel lens; b. providing a lower mold on which the mixture is disposed; c. vacuumizing the mixture on the lower mold; d. providing an upper mold to exert a pressure on a top surface of the mixture; e. vacuumizing the mixture on the lower mold again; and f. heating the mixture on the lower mold to harden the mixture whereby the Fresnel lens can be obtained.

Abstract: An exemplary solar energy conversion device includes a substrate, a solar energy conversion chip, and a carbon nanotube layer. The substrate defines a through hole. The solar energy conversion chip is positioned on the substrate and covers the through hole. The solar energy conversion chip includes a light incident surface facing away from the substrate and a heat dissipating surface at an opposite side thereof to the light incident surface. The carbon nanotube layer is formed on the heat dissipating surface.

Abstract: An exemplary Fresnel lens includes a flat emitting surface and a plurality of annular Fresnel lens elements at an opposite side thereof to the emitting surface. Each of the Fresnel lens elements has a non-lens surface perpendicular to the emitting surface and a Fresnel lens surface adjoining the non-lens surface with an acute angle. Each of the Fresnel lens elements has a plurality of spaced cavities defined in the non-lens surface.

Abstract: A solar cell package comprises a substrate, a light-electricity transformation unit provided on the substrate for transforming solar energy into electricity, a package component covering the light-electricity transformation unit and the substrate, and a carbon nanotube film. The carbon nanotube film is provided on a surface of the light-electricity transformation unit to increase heat dissipation. A Fresnel lens is disposed corresponding to the top of the light-electricity transformation unit, and converges and concentrates solar energy on the light-electricity transformation unit.

Abstract: A solar cell package comprises a ceramic substrate, a light-electricity transformation unit provided on the substrate for transforming solar energy into electricity, and a sealing component covering the light-electricity transformation unit and the ceramic substrate. A Fresnel lens is disposed corresponding to the top of the light-electricity transformation unit, converges and concentrates solar energy onto the light-electricity transformation unit.

Abstract: An exemplary method for fabricating a molding stamper includes the following steps. Firstly, a master mold having microstructures spaced apart from each other is provided. Secondly, a patterned layer is formed on the microstructures, the patterned layer having molding surfaces apart from each other, and being made of a flexible organic material. Thirdly, the master mold is removed from the patterned layer. Finally, a hard coating layer is deposited on the molding surfaces to form a molding stamper.

Abstract: An exemplary light guide plate includes an light incident surface, an light emitting surface, a number of parallel V-shaped structures, and a Fresnel lens portion. The light incident surface is configured for receiving light beams. The light emitting surface is adjacent to the light incident surface, and configured for emission of the light beams. The V-shaped grooves are defined in the light incident surface and arranged perpendicular to the light emitting surface. The Fresnel lens portion is provided on the light incident surface between each two neighboring V-shaped grooves.

Abstract: A mold for manufacturing Fresnel lenses includes a carrying holder, and a mold core including a bottom side surface adjacent to the carrying holder and a top side with a molding structure, wherein the mold core further comprises a number of through holes connected between the molding structure and the bottom side surface, and the carrying holder further comprises a number of pumping holes connected with the through holes.

Abstract: A method for making a mold, the method includes steps of: providing a substrate and a retaining member, the retaining member being made of polytetrafluoroethylene, and being ring-shaped; engaging the substrate with the retaining member; disposing viscous liquid polydimethyl siloxane containing material on the substrate within the retaining member; rotating the retaining member and the substrate to cause the polydimethyl siloxane containing material to spread out on the substrate and form a polydimethyl siloxane containing layer; press-molding the polydimethyl siloxane containing layer using a stamper to form one or more molding portions on the polydimethyl siloxane containing layer; solidifying the polydimethyl siloxane containing layer with the one or more molding portions; separating the stamper from the polydimethyl siloxane containing layer; and separating the substrate from the retaining member to obtain a mold.

Abstract: An exemplary Fresnel lens includes a flat emitting surface and a plurality of annular Fresnel lens elements at an opposite side thereof to the emitting surface. Each of the Fresnel lens elements has a non-lens surface perpendicular to the emitting surface and a Fresnel lens surface adjoining the non-lens surface with an acute angle. Each of the Fresnel lens elements has a plurality of spaced cavities defined in the non-lens surface.