NEWMAX TECHNOLOGY CO., LTD.

A lens module includes a lens mount, at least one lens, and a positioning ring. The lens mount is cylinder-shaped and has a first end and a second end along an axial direction. The inner peripheral face of the lens mount has a positioning section near the first end. The lens is arranged inside the lens mount. The positioning ring is arranged inside the lens mount, and an outer peripheral face thereof is positioned to the positioning section of the lens mount to prevent the lens from falling out. At least one of the positioning section and the outer peripheral face is formed with at least one threaded groove. The threaded groove extends around the axial direction. An end of the threaded groove near the first end is open for being injected with an adhesive for an engagement between the positioning ring and the lens mount.

An optical element having stray light suppression structure includes a main body which is ring-shaped and defines an axial direction. The main body has an inner peripheral face and an outer peripheral face. The main body is for being arranged inside a lens mount. The main body has a first end and a second end along the axial direction and has plural stray light suppression structures on the inner peripheral face. The stray light suppression structures are spacedly arranged around the axial direction. A surface of each stray light suppression structure is non-coplanar with the inner peripheral face. Each stray light suppression structure has a third end closer to the first end and a fourth end closer to the second end. Each stray light suppression structure has an extension path at least partially nonoverlapping a line defined from the third end to the fourth end.

An electronic device with fingerprint identification mechanism includes a touch panel, a camera unit, and a processing unit. A part of the touch panel is defined as a recognition area. The touch panel is adapted for at least one finger to touch for controlling. The camera unit is arranged under the touch panel. The camera unit includes a plurality of camera devices spacedly arranged. The camera devices face the touch panel. Projections of imaging ranges of the camera devices on the touch panel partially overlap so that the recognition area is covered by the projections of the imaging ranges of the camera devices. The processing unit is electrically connected to the touch panel and the camera unit respectively.

A lens with shielding structure includes a main body. The main body defines an axial direction. The main body includes an optical portion and a shielding portion. The optical portion is located at a center of the main body. The shielding portion is annular to surround the optical portion. The shielding portion includes a micro structure and a shielding layer. The micro structure includes a plurality of recesses formed on the main body. The shielding layer is coated on the micro structure to fill the recesses up.

A four-piece dual waveband optical lens system includes, in order from the object side to the image side: a stop; a first lens element with a positive refractive power having an object-side surface being convex near an optical axis, an image-side surface being convex near the optical axis; a second lens element with a negative refractive power having an object-side surface being concave near the optical axis, an image-side surface being convex near the optical axis; a third lens element with a positive refractive power having an object-side surface being concave near the optical axis, an image-side surface being convex near the optical axis; a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis, an image-side surface being concave near the optical axis, which has a short length and good performance without re-focusing in visible light and infrared dual waveband.

A five-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a stop, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power, a fifth lens element with a negative refractive power, a radius of curvature of an object-side surface of the second lens element is R3, a radius of curvature of an image-side surface of the second lens element is R4, focal lengths of the system, first, second and fourth lens elements are f, f1, f2, f4, respectively, satisfying the relations: 1.9 mm<f+(R3+R4)/(R3−R4)<2.9 mm, −2.0 mm<f1/(f2*f4)<−1.2 mm. Such arrangements can provide a five-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

A three-piece compact optical lens system includes, in order from the object side to the image side: a flat panel assembly made of glass, a first lens element with a negative refractive power having an object-side surface being concave near an optical axis; a stop; a second lens element with a positive refractive power having an object-side surface being convex near the optical axis and an image-side surface being convex near the optical axis; and a third lens element with a positive refractive power. Such a system can not only effectively collect light at a large angle, receive a wider range of images and achieve identification effects within very short distances, but also can reduce the distance between an object and the three-piece compact optical lens system, reduce the volume effectively and maintain its miniaturization.

A three-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a negative refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, a stop, a second lens element with a positive refractive power having an image-side surface being convex near the optical axis, at least one of an object-side and the image-side surfaces of the second lens element being aspheric, a third lens element with a refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis, at least one of the object-side and the image-side surfaces of the second and third lens elements being aspheric. Such a system has a wide field of view, large stop, short length and less distortion.

A three-piece infrared single wavelength projection lens system, in order from an image side to an image source side: a stop; a first lens element with a refractive power having an image-side surface being convex near an optical axis and an image source-side surface being concave near the optical axis; a second lens element with a positive refractive power; and a third lens element with a positive refractive power having an image-side surface being concave near the optical axis and an image source-side surface being convex near the optical axis. Such arrangements can provide a three-piece infrared single wavelength projection lens system with better image sensing function.

A three-piece infrared single wavelength projection lens system, in order from an image side to an image source side: a stop; a first lens element with a positive refractive power having an image-side surface being convex near an optical axis and an image source-side surface being concave near the optical axis; a second lens element with a negative refractive power having an image source-side surface being concave near the optical axis; and a third lens element with a positive refractive power having an image-side surface being concave near the optical axis and an image source-side surface being convex near the optical axis. Such arrangements can provide a three-piece infrared single wavelength projection lens system with better image sensing function.