Ability Opto-electronics Technology Co., Ltd.

Asia Optical Co., Ltd.

Chao-Hsiang Yang

Kuo-Yu Liao

Po-Jui Liao

Chen-Hung Tsai

Chun-Hong Chen

Hung-Kuo Yu

A lens assembly includes a lens set which includes a first lens, a second lens, a third lens and a fourth lens arranged in sequence along an optical axis. The first lens has a positive optical power. The second lens has a positive optical power. The third lens has a negative optical power. The fourth lens has a positive optical power, and has an image-side surface, an object-side surface, and a peripheral surface interconnecting the two. At least one of the object-side and image-side surfaces has an inflection point located between the optical axis and the peripheral surface. The lens assembly satisfies 15&#x3c;HFOV/f&#x3c;50, in which, HFOV represents one half of a maximum angle of view of the lens assembly, and f represents a focal length thereof.

Lens assembly

An imaging lens assembly includes first, second and third optical lenses that are arranged sequentially from an object side to an image side along an optical axis, and a constant-aperture diaphragm disposed between the second optical lens and the object side. Each of the first and second optical lenses has a positive refractive power near the optical axis. The third optical lens has a negative refractive power near the optical axis and has an object-side surface and an image-side surface, at least one of which has at least an inflection point. The imaging lens assembly satisfies: 0.55&#x3c;f/Dg&#x3c;0.85, in which, f is a focal length of the imaging lens assembly, and Dg is a length of a diagonal line of a maximum viewing angle in an imaging plane.

Imaging lens assembly

A miniaturized lens assembly includes a first lens, a stop, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is made of plastic material, is a meniscus lens with negative refractive power, and includes a convex surface facing the object side. The second lens is made of plastic material and is a biconvex lens with positive refractive power. The third lens is made of glass material and is a biconvex lens with positive refractive power. The fourth lens is made of glass material, is a biconcave lens with negative refractive power, and is adhered to the third lens to form a compound lens. The fifth lens is made of plastic material, is provided with positive refractive power, and includes an aspheric surface.

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Taichung, Taiwan

Chao-Hsiang Yang