Abstract: A holding device (1) holds a lens (6) at its lens edge (5) with the aid of an adhesive connection (16, 17). The adhesive connection (16, 17) is applied only at one adhesive point or only at two spaced apart adhesive points (16, 17). Each holding device (1) provided with a lens (6) is positioned on the dip frame in such a manner that the lens (6) is positioned above its holding device (1). A method is provided for finishing lenses (6) wherein the lenses (6) are subjected to various sequential finishing steps of a finishing process and the lenses (6) are cemented to the same holding device during finishing. The application of adhesive is only at one adhesive point or at two spaced apart adhesive points (16, 17).

Abstract: A light source apparatus includes a semiconductor laser which emits a laser beam, a coupling lens which converts the laser beam emitted from the semiconductor laser into a light flux, and a cylindrical lens into which the light flux is allowed to come from the coupling lens. The cylindrical lens is integrally formed with a lens portion, an outer circumferential portion which is arranged at an outer circumference of the lens portion, and a support portion which extends from the outer circumferential portion toward the semiconductor laser and which supports the coupling lens.

Abstract: An optical image capturing lens assembly includes four non-cemented lens elements, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface, and is made of plastic material, wherein the surfaces of the third lens element are aspheric. The fourth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and is made of plastic material, wherein the surfaces of the fourth lens element are aspheric.

Abstract: Including, in order from an object side: a first lens group having positive power; a second lens group having negative power; and a third lens group having positive power, each distance between respective lens groups varying upon zooming; the third lens group including, in order from the object side, a first sub-group having positive power, a second sub-group having positive power, a third sub-group having negative power, and a fourth sub-group having positive power, the first sub-group being movable along an optical axis for focusing, the third sub-group being movable in a direction including a component perpendicular to the optical axis, thereby correcting an image blur, and a given condition being satisfied, thereby providing a compact zoom lens having high optical performance with disposing a focusing lens and a vibration reduction lens in the same lens group, an optical apparatus equipped therewith, and a method for manufacturing the zoom lens.

Abstract: The invention relates to a reflective surface substantially perpendicular to a vector field described by the equation: W(x,y,z)=T(proj(x,v,z))?(x,v,z)+proj(x,v,z)?(x,v,z)?T(proj(x,y,z))?(x,y,z)? ?proj(x,y,z)?(x,y,z)? and a method for forming the reflective surface. The reflective surface is capable of providing a non-reversed, substantially undistorted direct reflection.

Abstract: An apparatus includes a recording light source configured to emit recording beams, an EASLM configured to time sequentially modulate the recording beams emitted from the recording light source according to hologram information corresponding to a 3-dimensional image spatially divided into a plurality of portions, an OASLM configured to include a plurality of regions corresponding to the plurality of the divided portions of the 3-dimensional image and images on a region corresponding to the portions using the modulated recording beams to form a hologram, a scanning optical unit configured to reproduce the hologram formed by the recording beams serially modulated by the EASLM on a reduced scale and transmit the hologram to the regions of the OASLM corresponding to the portions, and a reproducing light source configured to produce a surface light and emit the surface light to the OASLM.

Abstract: A lens barrel includes a moving frame, a stepper motor that drives the moving frame, a screw member that rotates in accordance with rotation of the stepper motor, a screw gear that rotates in accordance with rotation of the screw member, a nut member that screws with the screw member, moves, by pressing, the moving frame, an external rotation operation ring, including a drive gear that rotates in response to external operation, that switches between a first state where the drive gear meshes with the screw gear, rotates the screw member, and drives the moving frame and a second state where the drive gear and the screw gear are not meshed, and control means that drive-controls the stepper motor in conjunction with rotation of the external rotation operation ring when the external rotation operation ring is in the second state.

Abstract: An imaging lens includes: a first lens group; an aperture stop; and a second lens group having a positive power, in this order from an object side. The first lens group includes a first lens having a negative power and a second lens having a positive power. The imaging lens satisfies Conditional Formulae (1), (2), and (3): ?0.50<f/f1<0.20??(1) 0.08<d12/f<0.35??(2) 2.5<TL/Y<4.0??(3) wherein f is the focal length of the entire system, f1 is the focal length of the first lens group, d12 is a distance along an optical axis from the image side lens surface of the first lens to the object side lens surface of the second lens, TL is the distance along the optical axis from the most object side lens surface within the first lens group to an imaging surface Sim, and Y is a maximum image height, when focused on an object at infinity.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a reflective unit configured to bend an optical axis, and a rear lens group including two or more lens units, the reflective unit being stationary during zooming, the first and second lens units and two or more lens units of the rear lens group being moved during zooming, wherein the following conditions are satisfied: 4.3<?2t/?2w<12.0, and 2.1<?Rt/?Rw<3.0, where ?2w and ?2t denote lateral magnifications of the second lens unit at a wide-angle end and a telephoto end, respectively, and ?Rw and ?Rt denote lateral magnifications at the wide-angle end and the telephoto end, respectively, of a lens unit having a greatest variable power contribution out of the rear lens group.

Abstract: An eyeglass frame includes a front portion, a hinge provided on each of both ends of the front portion, and a temple connected to the front portion via the hinge. The hinge has a hinge piece, the temple has a metal connection part integrally formed with the hinge piece, and the connection part has a partially reduced section to form an elastic portion.

Abstract: An optical system includes a first optical group configured to form, at a first intermediate image plane, a first intermediate image of an object disposed at an object plane; a second optical group and a third optical group configured to form, at an image plane, a final image of the object based on the first intermediate image. The first optical group consists of a solid lens having a first surface and a concave second surface facing the first surface; the solid lens is configured to collect light originated at the object and to reflect thereinside at least twice the collected light. The second optical group includes at least one mangin mirror and the third optical group includes a plurality of lenses. The first, second and third optical groups can appropriately control axial chromatic aberration and Petzval curvature, so that imaging with high NA illumination may be performed.

Abstract: A power supply for supplying direct current (DC) power from a pulse width modulated (PWM) source includes a connector configured to be in electrical communication with a PWM power source. A hold-up circuit is in electrical communication with the connector and is configured to convert electrical power supplied from the PWM power source to DC power. This DC power is supplied to a drive circuit where a microcontroller is configured to control the drive circuit by supplying the DC power from the drive circuit to a load.

Abstract: In certain example embodiments, a solar collector system including a plurality of reflectors is provided. Each reflector has a stiffening rib associated therewith and is attached thereto on a side facing away from the sun. At least one area on each stiffening rib is suitable for accommodating a polymer-based adhesive for bonding the rib to a side of the associated reflector facing away from the sun. Each stiffening rib is formed so as to substantially match a contour of the associated reflector. At least two of each rib, the associated reflector, and the adhesive have respective coefficients of thermal expansion within about 50% of one another. Each stiffening rib is sized and positioned on the associated reflector so as to increase an EI value thereof at least about 10 times or to at least about 9,180 pascal meters4. Methods of making the same also are provided in certain example embodiments.

Abstract: Photonic nanostructures, light absorbing apparatuses, and devices are provided. The photonic nanostructures include a plurality of photonic nanobars configured to collectively absorb light over an excitation wavelength range. At least two of the photonic nanobars of the plurality have lengths that are different from one another. Each photonic nanobar of the plurality has a substantially small width and a substantially small height relative to the different lengths. A method for forming such may comprise forming a plurality of first photonic nanobars comprising a width and a height that are smaller than a length of the plurality of first photonic nanobars, and forming a plurality of second photonic nanobars comprising a width and a height that are smaller than a length of the second photonic nanobar, wherein the lengths of the plurality of first photonic nanobars and the lengths of the plurality of second photonic nanobars are different from one another.

Abstract: A lens barrel having an insertable/removable optical element includes an advancing/retracting member, an anti-shake frame supported by the advancing/retracting member, an insertable/removable frame holding the insertable/removable optical element and supported by the anti-shake frame, an anti-shake drive mechanism, and a removal drive mechanism which moves the insertable/removable frame between the insertion and the removed positions. The anti-shake drive mechanism includes first and second anti-shake drive actuators positioned on the opposite side of the insertion position from the removed position and are respectively positioned on opposite sides of a straight line connecting a center of the insertable/removable optical element at the insertion position and at the removed position. Directions of driving forces produced by the first and second anti-shake drive actuators are at right angles to each other.

Abstract: An eyeguard for use on the eye-end of an optical instrument is provided having an instrument-end member adapted for connection to the optical instrument, an eye-end member adapted to interface with the periocular portion of the user's face, a hinge member disposed between the instrument-end and eye-end members having two flexible annular hinges, and a diaphragm comprising a plurality of segments attached to the interior of the hinge member between the annular hinges. The force of the user's eye pressing the eye-end member toward the instrument-end member deforms the annular hinges such that the normally closed diaphragm segments move to an open position, allowing light to pass through the eyeguard.

Abstract: A micro-mirror includes stiffer end sections for limiting curvature, and thin middle sections forming ground electrodes and a hinge. Spacers arc provided beneath the thin middle sections of the micro-mirror for supporting hot electrodes, which attract the ground electrodes for rotating the micro-mirror about a tilt axis. The spacers enable the gap between the hot electrode and the micro-mirror to be designed separately from the thickness of the micro-mirror, and the gap between the ends of the micro-mirror and the substrate.

Abstract: A method and apparatus for preparing a digital hologram representing an image of an object includes generating a measurement beam and a first reference beam, irradiating the object by the measurement beam, and guiding the measurement beam reflected to an optical sensor. The method also includes guiding the first reference beam to a first mirror, and guiding the reflected beam to the optical sensor so that both beams generate an interference pattern on the sensor. The method includes providing a digital signal representing the interference pattern on the optical sensor, to obtain a digital hologram, and subjecting the digital hologram to a Fourier transform in the spatial frequency domain to obtain a spectrum. The method further includes replacing a section of a first image term overlapped by a DC-term by a corresponding section of a second image term.

Abstract: The present invention provides a wide-angle imaging lens assembly comprising, in order from an object side to an image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a third lens element with positive refractive power; a fourth lens element with negative refractive power having a concave image-side surface; and a fifth lens element with positive refractive power; wherein the two lens elements with refractive power closest to the object side are the first lens element and the second lens element; and wherein the number of lens elements with refractive power does not exceed six.

Abstract: The present invention relates to a variable magnification device and a telescopic sight using the same, and more particularly, to a variable magnification device which is capable of easily adjusting a magnification of a telescopic sight. The variable magnification device includes: a rotation bunch which has a ring shape conforming to the circumference of a barrel of a telescopic sight and includes a bent end formed on one side of the circumference of the rotation bunch; and a rod which is connected to the bent end and is bendable in the longitudinal direction of the barrel. The magnification of the telescopic sight can be adjusted with an aiming posture maintained, thereby allowing immediate hit on a target. In addition, a leverage effect can be used to easily and finely adjust the magnification of the telescopic sight with one hand, thereby preventing distortion of an aiming posture as maximally as possible.