Abstract: A two-element f-? lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a biconvex lens and the second lens is a biconcave lens. At least one optical surface is aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-? lens corrects the nonlinear relationship between scanned angle and the time into the linear relationship between the image spot distances and the time. Meanwhile, the two-element f-? lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved.

Abstract: A voice coil driving auto-focus lens module is disclosed. The voice coil driving auto-focus lens module includes a base, two conductive plates, an insulation spacer, four permanent magnets, a lens holder, an optical lens, a spring set, a coil, and a top cover. The lens holder, the optical lens and the coil form a lens set that moves synchronously while the permanent magnets are fixed on an outer circle of a leaf spring. The spring set includes a coil spring and a leaf spring. By resultant spring force due to extension or compression of the coil spring as well as the leaf spring, together with the electromagnetic force, the lens module moves fast, focuses stably and the tilt of the lens module is reduced.

Abstract: An optical glass lens set and a manufacturing method thereof are disclosed. An optical glass lens is used as an insert that is set into a cavity of a mold. By injection molding of the molded insert or press molding, an optical glass lens set with a lens holder is formed. The optical glass lens set includes at least one optical glass lens and a lens holder for fixing the optical glass lens. The manufacturing method simplifies processes and improves the yield rate. Moreover, the produced optical glass lens set is easily packaged into a camera lens, especially suitable for mini-cameras and camera phones.

Abstract: An optical lens, especially an optical lens for mobile phones or image sensors such as CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) is formed by a two-piece lens featuring high performance, minimized total length and low cost.

Abstract: A molding lens with indentations for measuring eccentricity and a method for measuring eccentricity thereof are disclosed. At least one indentation concentric with an optical surface is respectively disposed on a front plane and a rear plane of the molding lens on area outside the optical surface while the indentation is observed by means of a measuring microscope. Moreover, the eccentricity of the molding lens is detected by eccentricity test function of the measuring microscope and the eccentric direction is defined so as to modify the lens mould and replace conventional eccentricity test that uses a transmission eccentric scale indicator in combination with a jig. Thus the cost of test equipment is reduced, test procedure is simplified and efficiency of mould modification is improved. Therefore, it's more convenient to manage manufacturing of the lens.

Abstract: An optical scanning module with linear CMOS image sensor (linear CMOSM) applied to scanners or multi-function printers is disclosed. The optical scanning module includes a light source for emitting light, a reflection mirror group, a focus lens group, and a linear CMOS image sensor having at least one linear CMOS image sensor unit and one A/D analog-digital converter. The light source can be a cold cathode fluorescent lamp (CCFL), a Xenon lamp or linear LED. Light emitted from the light source projects onto an object being scanned. Then the light reflected by the object being scanned becomes scanning light, passing through the reflection mirror group and the focus lens group and being focused on the linear CMOS image sensor for being converted into electrical signal. By A/D conversion of the linear CMOS image sensor unit in the linear CMOS image sensor, signal is sent out in USB or LVDS format so as to achieve high scanning speed, low distortion, large depth of focus and convenient transmission.

Abstract: An auto-focus lens module that uses electromagnetic force as well as spring force as driving force to drive the lens for auto-focusing is formed by a rectangular base, two copper plates, an insulation spacer, four magnets, a lens holder, a lens, a coiled spring, a coil, and a rectangular top cover. The lens holder, the lens and the coil form a lens set that moves synchronously. The coiled spring is between the coil and the lens and is elastically supporting between a circular slot of the lens holder and the top cover while the four magnets are respectively located outside the coil symmetrically and equidistantly, on four corners of the rectangular base so that the structure and volume of the lens module are simplified and minimized. Moreover, the distance between the coil and the magnets is shortened so that the electromagnetic force therebetween is increased. Furthermore, the diameter of the coiled spring is reduced for improving stability of the spring force.

Abstract: A two-piece type optical imaging lens that includes a first lens element with positive refractive power, a second lens element with positive refractive power, an IR cut-off filter and an image sensor arranged along an optical axis in order from an object side. The first lens element and the second lens element are both meniscus aspherical molded glass lens while a convex surface of the first lens element is on the object side and a convex surface of the second lens is on the image side. The two-piece type optical imaging lens satisfies following conditions: 0.4f?d<0.9f, 0.

Abstract: An auto-focus lens module that uses electromagnetic force as well as spring force as driving force to control movement of the lens for auto-focusing consists of a rectangular base, two copper plates, an insulation spacer, four magnets, a lens holder, a lens, a coil, a spring, and a rectangular top cover. The lens holder, the lens and the coil form a lens set. The spring is sleeved outside the coil and is elastically supporting between the outer circular flange and the top cover while the four magnets are respectively located outside the spring, on four corners of the rectangular case. Thus the components of the lens module according to the present invention are simplified, the volume of the device is minimized, and the lens holder moves stably for focusing.

Abstract: A three piece type optical lens includes a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with negative refractive power, an IR cut-off filter and an image sensor arranged along an optical axis in sequence from an object side. The first lens element and the second lens element are both meniscus aspherical lens while a convex surface of the first lens element is on the object side and a convex surface of the second lens is on the image side. The third lens element is an M-shaped aspherical lens whose object side and image side are both M-shaped and a central surface of the optical axis can be a convex surface or a concave surface. A pre-aperture is disposed or a center-aperture is arranged on the optical lens.

Abstract: A laser device applied to a light source of laser scanning units (LSU) including a laser diode disposed on an accommodation hole of a flange. A collimator lens is arranged on one end of an inner tube part of a holder while the other end of the inner tube part faces the laser diode. The laser beam passes through the inner tube part of the holder and the collimator lens, then projects out. A lug extends radially from outer surface of the holder and a plurality of axial guide slots are disposed on the lug. A plurality of guide pins corresponding to the guide slots are arranged on the flange. An adhesive is located between the guide pins and the guide slots and spaced apart from the collimator lens.

Abstract: An auto-focus lens module that uses electromagnetic force as well as spring force as driving force to drive the lens for auto-focusing is formed by a rectangular base, two copper plates, an insulation spacer, four magnets, a lens holder, a lens, a coiled spring, a coil, and a rectangular top cover. The lens holder, the lens and the coil form a lens set that moves synchronously. The coiled spring is between the coil and the lens and is elastically supporting between a circular slot of the lens holder and the top cover while the four magnets are respectively located outside the coil symmetrically and equidistantly, on four corners of the rectangular base so that the structure and volume of the lens module are simplified and minimized. Moreover, the distance between the coil and the magnets is shortened so that the electromagnetic force therebetween is increased. Furthermore, the diameter of the coiled spring is reduced for improving stability of the spring force.

Abstract: A two-piece type optical imaging lens that includes a first lens element with positive refractive power, a second lens element with positive refractive power, an IR cut-off filter and an image sensor arranged along an optical axis in order from an object side. The first lens element and the second lens element are both meniscus aspherical molded glass lens while a convex surface of the first lens element is on the object side and a convex surface of the second lens is on the image side. The two-piece type optical imaging lens satisfies following conditions: 0.4f?d<0.9f, 0.

Abstract: An optical lens for mobile phones or image sensors such as CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) is formed by a three-piece lens with features of high performance, minimized total length and low cost.

Abstract: An optical lens, especially an optical lens for mobile phones or image sensors such as CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) is formed by a two-piece lens featuring high performance, minimized total length and low cost.

Abstract: A LED assembly with a molded glass lens includes a base, at least one LED chip and a cover lens. The LED assembly feature on that the cover lens consists of a molded glass lens and a transparent resin layer. A molded glass lens is covered on a loading surface of the base and then liquid transparent resin is filled into space between an inner surface of the molded glass lens and the loading surface through preset filling holes to coat the LED chip completely. After hardening, the transparent resin integrated with the molded glass lens so as to replace conventional cover lens made from transparent resin. Therefore, not only thermal resistance, weather resistance, discoloration resistance, and mechanical strength of the LED assembly are increased, but the brightness and light-emitting efficiency of the LED assembly are also improved.

Abstract: A molding lens with indentations for measuring eccentricity and a method for measuring eccentricity thereof are disclosed. At least one indentation concentric with an optical surface is respectively disposed on a front plane and a rear plane of the molding lens on area outside the optical surface while the indentation is observed by means of a measuring microscope. Moreover, the eccentricity of the molding lens is detected by eccentricity test function of the measuring microscope and the eccentric direction is defined so as to modify the lens mould and replace conventional eccentricity test that uses a transmission eccentric scale indicator in combination with a jig. Thus the cost of test equipment is reduced, test procedure is simplified and efficiency of mould modification is improved. Therefore, it's more convenient to manage manufacturing of the lens.

Abstract: An LED lighting device applied to laser beam printers (LBP), scanners, or multi-function printers (MFP) includes a lighting source, a focusing cap and a strip lens. The lighting source is composed of a plurality of LEDs that are arranged on the circuit board in a certain interval or in non-isometric, linearly or nonlinearly. The focusing cap disposed with a plurality of reflective areas is arranged between the lighting source and the lens. Each of the reflective areas corresponds to each of the LEDs and each of the reflective areas is arranged with a reflective surface according to types or lighting patterns of the LED. The strip lens is disposed on outer side of the focusing cap. The cross section of the lens includes an inner and an outer (or an upper and a lower) optical surfaces, respectively faces the plurality of LEDs and the scanned object.

Abstract: A molding lens with indentations for measuring eccentricity and a method for measuring eccentricity thereof are disclosed. At least one indentation concentric with an optical surface is respectively disposed on a front plane and a rear plane of the molding lens on area outside the optical surface while the indentation is observed by means of a measuring microscope. Moreover, the eccentricity of the molding lens is detected by eccentricity test function of the measuring microscope and the eccentric direction is defined so as to modify the lens mold and replace conventional eccentricity test that uses a transmission eccentric scale indicator in combination with a jig. Thus the cost of test equipment is reduced, test procedure is simplified and efficiency of mold modification is improved. Therefore, it's more convenient to manage manufacturing of the lens.

Abstract: An auto-focus lens module that uses electromagnetic force as well as spring force as driving force to control movement of the lens for auto-focusing consists of a rectangular base, two copper plates, an insulation spacer, four magnets, a lens holder, a lens, a coil, a spring, and a rectangular top cover. The lens holder, the lens and the coil form a lens set. The spring is sleeved outside the coil and is elastically supporting between the outer circular flange and the top cover while the four magnets are respectively located outside the spring, on four corners of the rectangular case. Thus the components of the lens module according to the present invention are simplified, the volume of the device is minimized, and the lens holder moves stably for focusing.