Abstract: An auto focus lens module with a piezoelectric actuator having a piezoelectric actuator, a tangent thrust element, a sliding fixture, a metal member, a guiding fixture, and a lens barrel is revealed. By a thrust in the tangent direction generated from the tangent thrust element toward the outer edge of the lens barrel, a friction is generated between the lens barrel and the piezoelectric actuator. When the piezoelectric actuator is applied with a voltage, the lens barrel driven by the piezoelectric actuator moves along an optical axis for focusing with the auxiliary of the guiding fixture. Due to fewer elements, light weight and compact volume, the design is applied to miniature auto focus lens modules so as to achieve effects of fast movement, stable focusing and reduced tilting.

Abstract: 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.

Abstract: The present invention discloses a MEMS scanning coordinate detection method and a touch panel thereof, wherein the touch panel comprises a light source module, a MEMS reflector, an image sensor, an image signal processor, and a coordinate calculator. When the laser light from the light source module is reflected by the MEMS reflector, the laser light is transformed into a scanning light beam. When the touch panel is touched by a pen or a finger, the scanning light beam is blocked and two inactive pixels are formed on the image sensor. The electronic signal is transmitted from the image signal processor and calculated by the coordinate calculator to determine the touch point position.

Abstract: 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.

Abstract: The present invention discloses an image scanning module having four reflecting mirrors, the image scanning module comprises at least one source, four reflection mirrors, a pickup lens, an image sensor and a frame, wherein at least one of reflection mirror is multi-reflection along the optical path, satisfies the specific optical conditions. The TTL (total tracking length) can only be adjusted through the arrangement of the distance of the four reflecting mirrors and will not need to adjust through the angle of the four reflecting mirrors. Accordingly, the benefit of present invention not only increases the field of depth by increasing the total length of optical path in the limited space, but also be convenient to assemble respectively to different total tracking length.

Abstract: An miniature three-piece optical imaging lens with short back focal length, along an optical axis from the object side to the image side including: a first lens of positive refractive power that is a meniscus aspherical lens having a convex surface on the object side, an aperture stop, a second lens of negative refractive power that is a meniscus aspherical lens having a convex surface on the image side, a third lens of negative refractive power that is an aspherical lens whose center is on the optical axis, while on the lens center the convex surface is on the object side and the concave surface is on the image side. Moreover, from the center of the third lens element toward the edge, the refractive power changes from negative power, through an inflection point, to positive power. Furthermore, the optical imaging lens further satisfies conditions: 0.25 ? bf TL ? 0.4 wherein bf is back focal length, TL is total distance on the optical axis from the object side of the first lens to the image plane.

Abstract: A stacked optical glass lens array, a stacked lens module and a manufacturing method thereof are disclosed. The stacked optical glass lens array includes at least two optical glass lens arrays whose optical axis are aligned and then stacked with each other by cement glue in glue grooves. A stacked optical glass lens element can be singularized by cutting along with the alignment notches of stacked optical glass lens array. The stacked lens module is formed by a single stacked optical glass lens element and related optical element mounted in a lens holder. Thereby the optical axis of the lenses of the stacked lens module are aligned precisely, the manufacturing processes are simplified and the production cost is reduced.

Abstract: A miniature stacked glass lens module is disclosed. The miniature stacked glass lens module includes at least one stacked optical glass lens element, a lens holder and other optical element. The stacked optical glass lens element is formed by cutting along alignment notches on a glued and stacked optical glass lens array. Then the stacked optical glass lens element and other optical element are mounted into the lens holder to form a miniature stacked glass lens module. Thereby the precise alignment of the optical axis of the lens in the lens module can be achieved. The manufacturing processes of the lens module can be simplified dramatically and the manufacturing cost is reduced significantly.

Abstract: A compact zoom lens with three lens groups and a design method thereof are revealed. Along the optical axis from the object side to the image side, the compact zoom lens with three lens groups includes a negative power first lens group having a negative power first lens and a negative power second lens sequentially, a positive power second lens group having a positive power third lens, a negative power fourth lens leaned with the third lens and a positive power fifth lens, and a third lens group having a positive power sixth lens. The zoom lens matches requirements of optical properties for aberration correction. Moreover, use minimum change of the distance between the first lens of the first lens group and the image forming plane from the WIDE position to the TELE position as the objective function of optimization to design the zoom lens, a zoom lens with nearly unchanged lens length, high resolution, high image quality and good aberration correction is produced.

Abstract: The present invention discloses a penta-mirror multi-reflection image scanning module including at least one light source, five reflecting mirrors, a pickup lens, an image sensor, and a frame. The reflecting mirrors reflect a light beam from a document and a plurality of reflecting mirrors reflect a light beam of the document twice or more to change the light beam direction along light path, and satisfy specific optical conditions. The total tracking length (TTL) may be adjusted through an arrangement of the distance of the five reflecting mirrors, but may not be adjusted through the angle of the five reflecting mirrors. Therefore, the present invention not only increases the field of depth by increasing the length of optical path in a limited space, but also facilitates the assembling to adapt to different tracking lengths.

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, the second lens is a meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, at least one optical surface is an 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 rectangular stacked lens module and a manufacturing method thereof are disclosed. The rectangular stacked lens module is produced by cutting straight lines through a stacked lens module array. Firstly, it produces at least two lens arrays. Each lens array includes a plurality of optical lenses by multi-cavity glass molding and at least one alignment member disposed on the non-optical area of the lens array. Then at least the two lens arrays are assembled by the alignment members and are stacked with other optical elements so as to form a stacked lens module array. The optical axis of each optical lens is aligned easily with each other so as to meet requirements for optical precision. Moreover, the manufacturing processes are simplified and the purposes of mass-production and low cost are achieved.

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, the second lens is a meniscus lens of which the concave surface is disposed on a side of a MEMS mirror, at least one optical surface is an 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 two-element f? lens with short focal distance is used for a laser scanning unit with a polygon mirror and the two-element f? 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 f? lens satisfies an optical condition of 0.4557?tan(?)?0.7265, wherein ? is a maximum effective window angle.

Abstract: The present invention discloses a U-shape optical path image scanning method and a scanning module thereof, in which an image of a document is reflected by a plurality of reflection mirrors to form image beams, and the image beams which enter the scanning module and the image beams which enter the pickup lens form a U-shape optical path. Optical axis of the pickup lens and the scanning module are parallel to the image of the document so as to prevent scattered beams from entering the pickup lens or forming a ghost image. Accordingly, the depth of field not only can be increased by increasing the length of the optical path in a limited space, but the pickup lens and the image sensor also can be easily adjusted in manufacture or assembly to reduce the assembly complexity and improve the mass production rate.

Abstract: A two-element f? 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 f? lens satisfies an optical condition of: 0.5429?tan(?)?1.2799, wherein ? is a maximum effective window angle. The first and second lenses of the two-element f? 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.

Abstract: A Fresnel light emitting diode (LED) Lens and a LED Assembly thereof are provided. The Fresnel LED Lens is a lens disposed with a plurality of Fresnel optical surfaces. Each Fresnel optical surface includes a zone area having a plurality of drafts with vertical shape. Each Fresnel optical surface is arranged linearly along a center of a corresponding LED, and each Fresnel optical surface can used to focus light emitted from a LED chip so as to generate a quasi-circle distribution pattern of light with uniform light intensity and satisfy special optical requirements. A LED assembled formed by the Fresnel LED lens and a corresponding LED is used as a light source applied to illumination, mobile phone flashlights or camera flashlights.

Abstract: A two-element f? 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 f? lens satisfies an optical condition of: 0.5429?tan(?)?1.2799, wherein ? is a maximum effective window angle. The first and second lenses of the two-element f? 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.

Abstract: A rectangular optical glass lens and a manufacturing method thereof are disclosed. A rectangular glass blank is put between an upper mold and a lower mold of a multi-cavity mold and then being heated and pressured. The rectangular glass blank is molded into a lens sheet having a plurality of optical surfaces and the lens sheet is cut to form a plurality of rectangular optical glass lenses. The rectangular optical glass lens produced by such method includes two optical surfaces working as optical areas and a rectangle circumference on non-optical area surrounding the optical surface. The circumference is a rectangular part with four right angles on each corner while the right angles as well as the rectangular shape are formed by cutting of the lens sheet. Thus the manufacturing method of rectangular optical glass lenses are simplified and the produced lens is assembled with a lens module conveniently.

Abstract: A convex-Fresnel LED lens and a LED assembly thereof are revealed. The lens is a Fresnel lens whose optical surface on a forward side thereof is a convex surface having draft with vertical shape so that the lens in the LED assembly concentrates light emitted from a LED chip to generate light whose peak intensity is an elliptic distribution pattern. Moreover, the lens and the LED assembly thereof satisfy certain conditions. Thereby, light from the LED chip is gathered by a single lens to form a preset specific distribution pattern and is satisfying requirement of the ratio of the luminous flux that is larger than 85%. The convex-Fresnel LED lens and a LED assembly thereof are applied to lights and flashlights in mobile phones or cameras.