摘要:
A light concentration element assembly includes a Fresnel lens unit and a compound parabolic concentrator. The Fresnel lens unit includes a first Fresnel lens and a second Fresnel lens arranged parallel with each other, and configured for converging light transmitted therethrough. The compound parabolic concentrator includes at least two paraboloidal reflecting surfaces. The parabolic concentrator includes a light incident opening facing the Fresnel lens unit and a light output opening, and the paraboloidal reflecting surfaces are configured for reflecting the converged light from the Fresnel lens unit and outputting the reflected light through the light output opening. A solar cell apparatus using the light concentration element assembly is provided.
摘要:
An LED lamp includes a lamp holder, a heat sink, a light source and an envelope. The lamp holder is configured for electrically connecting with a power source. The heat sink is connected to the lamp holder. The light source is mounted on the heat sink. The envelope is mounted on the heat sink and covers the light source. The envelope has a light incident surface and a light output surface opposite to the light incident surface. A plurality of lens are formed on the lamp envelope and configured for collecting light rays generated by the light source.
摘要:
A LED package includes a substrate, at least one LED chip, a transparent adhesive and a lens. The at least one LED chip is mounted on the substrate. The transparent adhesive is filled between the LED chip and the lens. A number of through holes is regularly defined in an optical non-effective portion of the lens. The through holes are configured for increasing the air convection between inside and outside of the lens.
摘要:
A light energy testing device includes a light source emitting parallel light, a Fresnel lens concentrating the parallel light, a fiber array consisting of a plurality of optical fibers, and an energy detecting device. Each fiber includes a light incident and emitting surface. The light incident surfaces are coplanar to define a light receiving surface. The light emitting surfaces cooperatively define a light transmitting surface. The energy detecting device includes a plurality of sensor units optically coupled with the light transmitting surface and a testing device connected to the sensor units. The parallel light is focused by the Fresnel lens to irradiate the light receiving surface. The sensor units generate energy signals according to the light from the light transmitting surface. The energy detecting device calculates a light energy distribution according to the energy signals.
摘要:
A light concentrator assembly includes a first Fresnel lens, a second Fresnel lens, and a compound parabolic concentrator. The first Fresnel lens includes a first flat surface and an opposite first Fresnel lens surface. The second Fresnel lens includes a second flat surface and an opposite second Fresnel lens surface facing the first Fresnel lens surface. A first focal point of the first Fresnel lens and a second focal point of the second Fresnel lens coincide. The compound parabolic concentrator is located opposite the second flat surface. Light beams are converged by the first and second Fresnel lenses, and exit through the compound parabolic concentrator.
摘要:
A light concentrator assembly includes a Fresnel lens, a plano-concave lens, and a CPC. The CPC is aligned with the Fresnel lens and the plano-concave lens. The Fresnel lens unit is configured for converging parallel light transmitted the Fresnel lens. The plano-concave lens is configured for further concentrating the light from the Fresnel lens before the light converged at a point. The CPC is configured for reflecting and directing the light beams from the plano-concave lens to exit through a light output opening of the CPC. The light concentrator assembly has a large incident acceptance angle.
摘要:
A light source holder includes a spherical surface and a number of recessed portions. The recessed portions are defined in the spherical surface and arranged substantially evenly over the spherical surface. Each of the recessed portions comprises a plurality of inner surfaces. The inner surface of each recessed portion comprises a bottom surface and a lateral reflective surface. The bottom surface is capable of having a solid-state light source arranged thereon. The lateral reflective surface is adjacent to the bottom surface and configured for reflecting light emitted from the solid-state light source and outputting the light from the recessed portion.
摘要:
A non-imaging lens includes a transparent member, a first Fresnel lens portion and a second Fresnel lens portion. The transparent member includes a first surface and a second surface. The first Fresnel lens portion includes a plurality of first saw-toothed protrusions concentrically defined on the first surface. The second Fresnel lens portion includes a plurality of second saw-toothed protrusions concentrically defined on the first surface. The second saw-toothed protrusions are defined around the first saw-toothed protrusions. Each of radii of curvature of the second saw-toothed protrusions is different from each of radii of curvature of the first saw-toothed protrusions.
摘要:
A non-imaging lens includes a transparent member, a conical protrusion, and a plurality of annular protrusions. The transparent member includes a first surface and a second surface. The first surface and the second surface are planar. The conical protrusion is defined on the first surface of the transparent member. The annular protrusions are concentrically defined on the first surface around the conical protrusion. Each of cross-sections of the annular protrusions approximately forms a right triangle. Each of the triangles includes a first angle, a second angle, a bottom surface, a first surface and a second surface. The first angle exceeds the second angle. The first angle is less than or equal to 90°. The second angles increase in turn outwards from the conical protrusion. The width of the bottom surface is equal to the radius of the conical protrusion.
摘要:
A reflecting cover includes a first reflective plate, a second reflective plate and a plurality of side reflective plates. The first reflective plate and the second reflective plate are perpendicular to the X-Z plane. The side reflective plates are perpendicular to the X-Y plane. The side reflective plates are located between the first reflective plate and the second reflective plate. The first reflective plate and the second reflective plate inclined toward each other. A plurality of LEDs is received in the reflecting cover and adjacent to the first reflective plate and the second reflective plate. A part of the emission of the LEDs is blocked and reflected by the first reflective plate and the second reflective plate and portions of the side reflective plates adjacent to the first and second reflective plates.