Abstract:
A variety of light-emitting devices for general illumination utilizing solid state light sources (e.g., light emitting diodes) are disclosed. In general, the devices include a scattering element in combination with an extractor element. The scattering element, which may include elastic and/or inelastic scattering centers, is spaced apart from the light source element. Opposite sides of the scattering element have asymmetric optical interfaces, there being a larger refractive index mismatch at the interface facing the light emitting element than the interface between the scattering element and the extractor element. Such a structure favors forward scattering of light from the scattering element. In other words, the system favors scattering out of the scattering element into the extractor element over backscattering light towards the light source element. The extractor element, in turn, is sized and shaped to reduce reflection of light exiting the light-emitting device at the devices interface with the ambient environment.
Abstract:
The present invention provides an optical assembly, a backlight unit having the same, and a display apparatus thereof, and the optical assembly includes: a light emitting device; and a lens disposed above the light emitting device, and the lens has: a lower surface portion through which light emitted from the light emitting device travels inside; an upper surface portion that totally reflects at least some of the light traveling inside through the lower surface portion, downward to the side; and a side portion through which the light totally reflected from the upper surface portion is discharged to the outside.
Abstract:
A solar concentrator (1) having a longitudinal axis of extension (3) and a cross-section at right angles to the longitudinal axis substantially equal for a continuum of cross-sections, and comprising a reflective system (6) and a refractive system (7), the reflective system forming an optical inlet (8) and an optical outlet (9) and comprising two semi-portions positioned specularly relative to the plane of symmetry, where the cross-section profile of the refractive system is a triangle (11) having a base (12) at the optical outlet (9) and apex (13) on the axis of symmetry (5), where the cross-section profile of each semi-portion of the reflective system comprises a segment (18) in the shape of a parabola having an axis (20) forming with the axis of symmetry an acceptance angle (&thetas;0) greater than zero and a focus (F) on the axis of symmetry, and where the focus falls inside the triangle.
Abstract:
An optical assembly is provided wherein the optical assembly includes a first optical element configured to receive light and alter a transmission path of the light through the first optical element in a first direction and a second direction, and a second optical element in optical communication with the first optical element, the second optical element configured to receive the light from the first optical element, and alter a transmission path of the light through the second optical element in the first and second directions, wherein the light is passed through the second optical element, such that a sensor receives light from a field of view that is approximately 30 degrees to 60 degrees offset from a field of view of the sensor.
Abstract:
The present invention relates to a lens (100) for an illuminating device, wherein the lens (100) has a bottom surface (1) and an emergent surface (2) protruding from the bottom surface (1), the bottom surface (1) comprises a recessed region (3) that forms an incident surface (4), characterized in that the emergent surface and the incident surface are configured in such a manner that light is incident upon the incident surface and emits from the emergent surface, the light emitted from the emergent surface forms symmetrical light spots at both sides of a first section (V1) defined by an optical axis (A) of a light source (5) of the illuminating device and a first straight line perpendicular to the optical axis (A), and forms asymmetrical light spots at both sides of a second section (V2) defined by the optical axis (A) and a second straight line perpendicular to the first straight line, wherein light emitted from the emergent surface (2) produces uniform luminance (L) after reflected by various positions of an illuminated surface (S). The present invention further relates to an illuminating device having the above lens (100).
Abstract:
The present invention relates to an optical device (229) for forming a light beam, which optical device comprises a lens (330) having a top section (331) configured to receive light emitted by a light source (220), a bottom section (332) configured to allow the received light to exit the lens, and a plurality of side sections (333) stretching from the top section to the bottom section. The plurality of side sections enclose the lens and are adapted to reflect and refract incident rays of the received light. A cross-section (334) of the lens, in a plane perpendicular to a center axis (338) stretching from the top section to the bottom section, has the shape of a polygon, which polygon is oriented in a length-wise direction (335) and in a transversal direction (336) being perpendicular to each other. Furthermore, the lens is adapted such that the received light exits the lens as a light beam formed to an elongated shape (5) at a predetermined distance (4) from the optical device. With the presented optical device, a compact lens enabling for a desired elongated illumination distribution is provided.
Abstract:
In a particle analyzing apparatus including a capillary for passing through a fluid containing particles to be analyzed, an optical system is employed to collect fluorescent light emitted from particles or substances labeled to the particles with improved collection efficiency preserving resolution of the instrument. The optical system may include a first collection lens attached to the capillary and a first reflection element arranged adjacent to the first collection lens configured to reflect fluorescent light of one or more wavelengths. The optical system may include a second collection lens attached to the capillary and a second reflection element arranged adjacent to the second collection lens configured to reflect fluorescent light of one or more wavelengths.
Abstract:
Disclosed is a light emitting device. The light emitting device includes a light emitting chip, and an optical lens provided on the light emitting chip. The optical lens includes an incident surface into which a light emitted from the light emitting chip is incident, a recess portion opposite to the incident surface and recessed in a direction of the incident surface, an exit surface provided at a peripheral portion of the recess portion to output a light incident through the incident surface, and a convex portion protruding between the recess portion and the exit surface and connected with at least one of the recess portion and the exit surface through an inflection point. The convex portion is located inward of a line segment ranging from the light emitting chip to a first inflection point provided at an outermost portion of the recess portion.