摘要:
The present invention discloses an LED lens and a light source device using the same. The light source device includes the LED lens and a LED. The LED lens comprises a light incident surface, a light emitting surface, and a bottom surface. The light emitting surface includes a recession portion disposed at the central thereof and a convex portion connected to the recession portion. The light incident surface is a concave surface and comprises a first optically active area and a second optically active area. The first optically active area is disposed at the central of the light incident surface; the second optically active area is connected to the first optically active area and the bottom surface. At the junction between the first optically active area and the second optically active area, it is an optical path inversion point that is disposed satisfying specific condition.
摘要:
A single-piece optical imaging lens and an array thereof are revealed. The optical imaging lens includes a lens and an image sensor arranged at an image-side surface of the lens. The lens includes an object-side surface, an image-side surface, an optical area, and a non-optical area. The optical imaging lens satisfies the following conditions: BFL/TTL=0.55˜0.81, OH/OD=1.0˜3.6. TTL is total length from the object-side surface of the lens on the optical axis to the image sensor. BFL is back focal length of the imaging lens. OD is the distance between an object on the optical axis and the object-side surface of the lens. OH is the largest height of an object vertical to the optical axis of OD. The single-piece optical imaging lens array is used to produce a plurality of single-piece optical imaging lenses by cutting.
摘要:
A disk-shaped optical lens array produced by resin injection-compression molding and a manufacturing method thereof are revealed. The disk-shaped optical lens array has at least one alignment fixture a first surface and a second optical surface. The optical surfaces respectively including a plurality of optical zones corresponding to each other so as to form a plurality of optical lens elements arranged in an array and a plurality of single optical elements is produced after cutting. At least one disk-shaped optical lens array and other optical lens element/or two disk-shaped optical lens arrays are aligned with an optical axis of an optical lens element by the alignment fixture to form a stacked disk-shaped optical lens array. Therefore the manufacturing processes of the optical lens arrays are simplified with improved precision and reduced cost.
摘要:
A lens holder for alignment of a stacked lens module and a manufacturing method thereof are revealed. A stacked lens submodule disposed with at least one first alignment fixture is used as a molding insert to be set into a mold arranged with a second alignment fixture where the first alignment fixture connects with the second alignment fixture correspondingly. Then by injection or press molding of the embedded molding insert, a lens module with the lens holder for alignment is formed. Thereby the conventional manufacturing method of the lens molder is improved, the processes are simplified and the yield rate is increased. Moreover, the molded lens module is packed into the lens more easily so that it is suitable to be applied to camera lenses, small lenses and mobile phone lenses.
摘要:
A two-element fθ lens with short focal distance for a laser scanning unit comprises a first lens and a second lens. The first lens has first and second optical surfaces, the second lens has third and fourth optical surfaces, and all the optical surfaces in a main scanning direction on the optical axis are aspherical surfaces. The fourth optical surface has an inflection point in SAG counted from the optical axis to peripheral portion and its paraxial portion is convex that is disposed on the polygon mirror side. The two-element fθ lens satisfies an optical condition of: 0.5429≦tan(β)≦1.2799, wherein β is a maximum effective window angle. The first and second lenses of the two-element fθ lens with short focal distance of the invention effectively reduces the distance from the polygon mirror to an imaging surface to achieve the purpose for reducing the volume of the laser scanning unit.
摘要:
A lens holder for alignment of a stacked lens module and a manufacturing method thereof are revealed. A stacked lens submodule disposed with at least one first alignment fixture is used as a molding insert to be set into a mold arranged with a second alignment fixture where the first alignment fixture connects with the second alignment fixture correspondingly. Then by injection or press molding of the embedded molding insert, a lens module with the lens holder for alignment is formed. Thereby the conventional manufacturing method of the lens molder is improved, the processes are simplified and the yield rate is increased. Moreover, the molded lens module is packed into the lens more easily so that it is suitable to be applied to camera lenses, small lenses and mobile phone lenses.
摘要:
A lens holder of a stacked lens module and a manufacturing method thereof are revealed. A stacked lens submodule is used as a molded molding insert to be set into a mold cavity. The molding insert is aligned in the alignment fixture and the clamp of the mold by injection molding or press molding. After molding process, a lens module included the stacked lens submodule as well as the lens holder is formed. Thereby the manufacturing method of conventional lens assemblies or lens modules is improved. Moreover, the processes are simplified and the yield rate is increased. Furthermore, the molded lens module is packed into the lens more easily so that it is suitable to be applied to camera lenses, small lenses and mobile phone lenses.
摘要:
A two-element fθ lens with short focal distance is used for a laser scanning unit with a polygon mirror and the two-element fθ lens comprises a first lens and a second lens. The first lens is a positive power meniscus lens and the second lens is a negative power meniscus lens in the main scanning direction. The first lens has a first and a second optical surface, the second lens has a third and a fourth optical surface. Concave surfaces of the first, second and third optical surfaces are disposed on the polygon mirror side. The fourth optical surface has an inflection point in SAG counted from the optical axis to peripheral portion and its paraxial portion is convex that is disposed on the polygon mirror side. The two-element fθ lens satisfies an optical condition of 0.4557≦tan(β)≦0.7265, wherein β is a maximum effective window angle.
摘要:
A two-element fθ lens with short focal distance for a laser scanning unit comprises a first lens and a second lens. The first lens has first and second optical surfaces, the second lens has third and fourth optical surfaces, and all the optical surfaces in a main scanning direction on the optical axis are aspherical surfaces. The fourth optical surface has an inflection point in SAG counted from the optical axis to peripheral portion and its paraxial portion is convex that is disposed on the polygon mirror side. The two-element fθ lens satisfies an optical condition of: 0.5429≦tan(β)≦1.2799, wherein β is a maximum effective window angle. The first and second lenses of the two-element fθ lens with short focal distance of the invention effectively reduces the distance from the polygon mirror to an imaging surface to achieve the purpose for reducing the volume of the laser scanning unit.
摘要:
A high SAG optical lens and method for fast molding the same is disclosed, in which an optical lens is a single optical lens or an optical lens array formed by placing optical material between an upper mold and a lower mold for molding by heating and pressing processes; a formed rim is molded at the joint of the optical surface and the lens flange simultaneously. Therefore, it is convenient to fabricate the optical lens with high SAG and can eliminate the ghost phenomena effect occurring at the edge of the optical surface and the lens flange. Furthermore, since the feature of squeezing the melted optical material by the formed rim during the molding process, fast molding process can be successfully achieved.