Abstract: A method and apparatus for beam combining for multiple multimode semiconductor laser diodes includes achieving beam combining in radiant space to provide a directional laser beam with a uniform high radiant intensity level distribution over a large area at a long distance from the source. The method uses more than one broad area high-power multimode semiconductor laser diode and individual optics for collimation, and includes combining the beams of these emitters to provide a relatively homogeneous radiant intensity beam at a long distance for applications such as directed energy delivery, free-space laser communication, and directional infrared countermeasures.

Abstract: An electronic device is provided. The electronic device includes a housing, and a camera module disposed in an inner space of the housing, wherein the camera module includes an image sensor and a plurality of lenses aligned with the image sensor, and wherein at least one of the plurality of lenses includes a first area formed to transfer at least a part of an external light to the image sensor and a second area including a light absorbing layer formed to absorb the at least a part of the external light and to penetrate from an outer surface of the lens into an inner space with a predetermined depth.

Abstract: The present disclosure provides a fiber laser light coherent combination system, comprising: a modulator module configured to perform a phase modulation on sub-beams according to pseudo-random sequences orthogonally independent from each other, and perform a frequency shift on a reference beam according to a set frequency; a fiber laser light amplifier module configured to perform a power amplification on the modulated sub-beams; a laser light collimation emission module configured to collimate and output the sub-beams and the reference beam; a combination sampling module configured to perform a combination of the sub-beams and the reference beam which are collimated and outputted, and convert them into an electrical signal; a digital phase modulation and demodulation module configured to perform a demodulation on the electrical signal according to the shifted frequency and each of the pseudo-random sequences, and obtain a phase difference between each of the sub-beams and the reference beam.

Abstract: An optical system is provided. The optical system includes a first movable portion, a fixed portion, a first driving assembly, and a first sensing assembly. The first movable portion is used for connecting to an optical assembly having a main axis. The first movable portion is movable relative to the fixed portion. The first driving assembly is used for driving the first movable portion to move relative to the fixed portion. The first sensing assembly is used for sensing the movement of the first movable portion relative to the fixed portion.

Abstract: An optical system includes an optical waveguide, and a first optical element configured to direct a first ray, having a first circular polarization and impinging on the first optical element at a first incidence angle, in a first direction so that the first ray propagates through the optical waveguide via total internal reflection toward a second optical element. The first optical element is configured to also direct a second ray, having a second circular polarization that is distinct from the first circular polarization and impinging on the first optical element at the first incidence angle, in a second direction that is distinct from the first direction so that the second ray propagates away from the second optical element. The second optical element is configured to direct the first ray propagating through the optical waveguide toward a detector.

Abstract: A lens assembly includes a plurality of lenses spaced apart from each other along an optical axis; and a first spacer disposed along the optical axis between any two lenses of the plurality of lenses, wherein the first spacer includes a body portion including an opening enabling light to travel between the two lenses; and an extension portion protruding from one surface of the body portion and extending toward one lens of the two lenses, the one lens being either one of the two lenses, the one surface of the body portion is spaced apart from the one lens, and the extension portion contacts and supports the one lens.

Abstract: A lens driving device is provided, including: a holder member; a bobbin disposed at an inner side of the holder member; a magnet disposed at the holder member; a first coil unit disposed at the bobbin, and facing the magnet; a first support member coupled to the holder member and the bobbin; and a detection sensor disposed at the bobbin, and configured to detect magnetic force of the magnet, wherein the magnet includes a facing surface and an opposite surface disposed at an opposite side of the facing surface, wherein a polarity of the facing surface and a polarity of the opposite surface are different from each other, wherein a polarity of an upper portion of the facing surface and a polarity of a lower portion of the facing surface are different from each other. According to an embodiment, Hall output detected by the detection sensor can be enhanced.

Abstract: Optical apparatus includes an electrically-tunable lens, including an electro-optical layer, having, for a given polarization of light incident on the layer, an effective local index of refraction at any given location within an active area of the electro-optical layer that is determined by a voltage waveform applied across the electro-optical layer at the location. Conductive electrodes extend over opposing first and second sides of the electro-optical layer and include an array of excitation electrodes. Control circuitry applies control voltage waveforms to the excitation electrodes. A polarization rotator is positioned and configured to intercept incoming light that is directed toward the lens and to rotate a polarization of the intercepted light so as to ensure that the light incident on the electro-optical layer has a component of the given polarization regardless of an initial linear polarization of the intercepted light.

Abstract: An optical imaging system is provided. The optical imaging system has a first lens, a second lens, a third lens, and a fourth lens disposed in order from an object-side to an image-side. The optical imaging system satisfies the following conditional expressions: F No.?1.5, 0.5<EPD/TTL<0.7, where EPD is an entrance pupil diameter, and TTL is a distance from an object-side surface of the first lens to an imaging plane.

Abstract: A lens actuating unit is provided. The lens actuating unit includes: a bobbin configured to accommodate a lens module at an inner side of the bobbin; a first coil unit disposed at the bobbin; a housing disposed at an outer side of the bobbin; and a magnet unit configured to move the first coil unit through electromagnetic interaction with the first coil unit, wherein the housing includes a hole formed by being recessed from an inner side to an outer side to accommodate the magnet unit.

Abstract: A plastic barrel includes an object-end portion, an image-end portion, an inner tube portion and a plurality of protrusions. The object-end portion includes an outer object-end surface, an object-end hole and an inner annular object-end surface. One side of the inner annular object-end surface is connected to the outer object-end surface and surrounds the object-end hole. The image-end portion includes an outer image-end surface, an image-end opening and an inner annular image-end surface. The inner annular image-end surface is connected to the outer image-end surface and surrounds the image-end opening. The inner tube portion connects the object-end portion and the image-end portion and includes a plurality of inclined surfaces. The protrusions are disposed at least on one of the inner annular object-end surface, the inner annular image-end surface and the inclined surfaces, wherein the protrusions are regularly arranged around the central axis of the plastic barrel.

Abstract: An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

Abstract: An alignment apparatus for aligning components of an optical assembly include a chuck configured to support the optical assembly thereon, and an adjustable flexure assembly disposed around the chuck. The adjustable flexure assembly includes a plurality of flexures. The plurality of flexures are positioned relative to the chuck such that each of the plurality of flexures contact the optical assembly when the optical assembly is positioned on the chuck. Adjustment of a position of one or more flexures of the plurality of flexures adjusts an alignment of an optical axis of an optical component of the optical assembly when the optical assembly is positioned on the chuck, wherein the alignment apparatus is configured to align optical axes of the optical component to an angle of deviation of less than about 1,000 ?rad and provide an extinction ratio within the optical assembly of greater than or equal to 1000:1.

Abstract: An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

Abstract: A topographical measurement system uses an imaging cartridge formed of a rigid optical element and a clear, elastomeric sensing surface configured to capture high-resolution topographical data from a measurement surface. The imaging cartridge may be configured as a removable cartridge for the system so that the imaging cartridge, including the rigid optical element and elastomeric sensing surface can be removed and replaced as a single, integral component that is robust/stable over multiple uses, and easily user-replaceable as frequently as necessary or desired. The cartridge may also usefully incorporate a number of light shaping and other features to support optimal illumination and image capture.

Abstract: A microelectromechanical device for diffracting optical beams comprises a diffractive element suspended over a channel. The diffractive element is configured to receive an optical beam and diffract and/or transmit the optical beam based on an orientation of the diffractive element. At least one torsional actuator is operatively connected to the diffractive element. The at least one torsional actuator is configured to selectively adjust the orientation of the diffractive element. The diffractive element has a diffractive element resonant frequency that is nearly the same as a resonant frequency of the optical beam.

Abstract: An annular light trapping component includes an inner surface, an outer surface, an object-side surface and an image-side surface. The inner surface includes multiple L-shaped annular grooves. The annular light trapping component includes multiple stripe-shaped structures in the L-shaped annular grooves. The L-shaped annular grooves include an object-side L-shaped annular groove closest to the object-side surface and an image-side L-shaped annular groove closest to the image-side surface. A bottom diameter of the image-side L-shaped annular groove is larger than a bottom diameter of the object-side L-shaped annular groove. Each L-shaped annular groove includes a first side and a second side located between the object-side surface and the image-side surface. The stripe-shaped structures are disposed on the first side or the second side. A degree of inclination between the first side and the central axis is larger than a degree of inclination between the second side and the central axis.

Abstract: The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the first lens has a positive refractive power, and the camera optical lens satisfies conditions of: 0.95?f/TTL; 3.50?f2/f?5.50; and ?20.00?(R5+R6)/(R5?R6)??3.00. The camera optical lens can achieve good optical performance while meeting the design requirements for long focal length and ultra-thinness.

Abstract: An alignment tool including a first and a second positioning system configured for positioning and orientating a first lens and a second lens respectively, wherein a light beam is configured to be disposed through the first lens and the second lens to cast a light spot on the image plane, if the light spot does not stay stationary on the image plane when at least one of the first lens and the second lens is rotated about the central axis of the light beam, at least one of the first positioning system and the second positioning system is actuated to alter at least one of the position and orientation of at least one of the first lens and the second lens until the light spot becomes stationary on the image plane, indicating the first lens is coaxially disposed with the second lens.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit configured not to move for zooming, a plurality of zooming lens units configured to move in zooming, a front relay lens unit configured not to move for zooming, an extender lens unit insertable into and removable from an optical path for changing a focal length range of the zoom lens, and a rear relay lens unit configured not to move for zooming, and satisfies specific conditional expressions.