Abstract: An optical lens assembly for image pickup, sequentially arranged from an object side to an image side along the optical axis, comprising: the first lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the second lens element with positive refractive power has bi-convex surfaces; and the third lens element with negative refractive power, made of plastic, and which has a convex object-side surface and a concave image-side surface with at least one thereof is aspheric. By such arrangements, the optical lens assembly for image pickup satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

Abstract: A keyboard capable of generating a tactile feedback signal makes use of acceleration change of pressing behavior and releasing behavior of a physical keyswitch during pressing and releasing stages. The acceleration change is modulated according to a touch sensitive frequency response in various ways so that a simulated tactile feedback may be generated on the keyswitches of the keyboard.

Abstract: An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power is made of plastic material, and has an image-side surface being concave at a paraxial region and being convex at a peripheral region, wherein at least one of an object-side surface and the image-side surface of the fifth lens element is aspheric.

Abstract: This invention provides an optical lens system in order from an object side to an image side comprising: a first lens element having a convex object-side surface; a negative second lens element having a concave object-side surface and a convex image-side surface; a positive third lens element having a convex object-side surface and a convex image-side surface; a plastic negative fourth lens element having a concave object-side surface and a convex image-side surface, with both the object-side and image-side surfaces thereof being aspheric. By such arrangement, the incident angle of off-axis light projected onto the sensor can be suppressed for improving the sensitivity of the sensor effectively. Also, a sufficient back focal length can be retained for disposing other optical elements (e.g., an IR-pass filter), and thereby the system can be more suitable for the infrared aspect of optical imaging systems.

Abstract: An image capturing lens assembly includes, in order from an object-side to an image-side along an optical axis, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region. The second lens element with positive refractive power has an image-side surface being convex at a paraxial region. The third lens element with negative refractive power has an object-side surface being concave at a paraxial region, and an image-side surface being convex at a paraxial region. The fourth lens element with positive refractive power has an object-side surface being convex at a paraxial region, and an image-side surface being concave at a paraxial region, and at least one of the object-side surface and the image-side surface is aspheric.

Abstract: This invention provides an image capturing lens system in order from an object side to an image side comprising four non-cemented lens elements with refractive power: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave image-side surface; a plastic third lens element having a concave object-side surface and a convex image-side surface, both the object-side and image-side surfaces thereof being aspheric; and a plastic fourth lens element with negative refractive power having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof; wherein the image capturing lens system comprises a stop positioned between the first lens element and the second lens element.

Abstract: An image lens system includes, in order from an object side to an image side, a first lens element with negative refractive power including a concave image-side surface; a second lens element with positive refractive power including a convex object-side surface; a third lens element with negative refractive power including an object-side surface and a concave image-side surface, the object-side surface and the image-side surface being aspheric; a fourth lens element with positive refractive power including a convex object-side surface and a convex image-side surface; and a fifth lens element with negative refractive power including a convex object-side surface and a concave image-side surface, the object-side surface and the image-side surface being aspheric, the fifth lens element having at least one inflection point.

Abstract: An image lens assembly includes, in order from an object side to an image side, the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power, the third lens element with refractive power, the fourth lens element with positive refractive power made of plastic material, the fifth lens element with negative refractive power made of plastic material. At least one surface of the third lens element, the fourth lens element and the fifth lens element are aspheric.

Abstract: An image capturing lens assembly includes, in order from an object-side to an image-side along an optical axis, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region. The second lens element with positive refractive power has an image-side surface being convex at a paraxial region. The third lens element with negative refractive power has an object-side surface being concave at a paraxial region, and an image-side surface being convex at a paraxial region. The fourth lens element with positive refractive power has an object-side surface being convex at a paraxial region, and an image-side surface being concave at a paraxial region, and at least one of the object-side surface and the image-side surface is aspheric.

Abstract: An optical image lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The second lens element with refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has two surfaces being aspheric. The fourth lens element with positive refractive power has a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points on at least one of the surfaces thereof.

Abstract: An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power is made of plastic material, and has an image-side surface being concave at a paraxial region and being convex at a peripheral region, wherein at least one of an object-side surface and the image-side surface of the fifth lens element is aspheric.

Abstract: An image lens system includes, in order from an object side to an image side, a first lens element with negative refractive power including a concave image-side surface; a second lens element with positive refractive power including a convex object-side surface; a third lens element with negative refractive power including an object-side surface and a concave image-side surface, the object-side surface and the image-side surface being aspheric; a fourth lens element with positive refractive power including a convex object-side surface and a convex image-side surface; and a fifth lens element with negative refractive power including a convex object-side surface and a concave image-side surface, the object-side surface and the image-side surface being aspheric, the fifth lens element having at least one inflection point.

Abstract: This invention provides an image capturing lens assembly in order from an object side to an image side comprising five lens elements with refractive power: 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 positive refractive power having a convex image-side surface, a third lens element with positive refractive power having a convex object-side surface, a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; and a fifth lens element with positive refractive power. By such arrangement, sufficient field of view is provided, and the aberration of the lens assembly is corrected for obtaining higher image resolution.

Abstract: An optical image lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The second lens element with refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has two surfaces being aspheric. The fourth lens element with positive refractive power has a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points on at least one of the surfaces thereof.

Abstract: This invention provides an optical lens system in order from an object side to an image side comprising: a first lens element having a convex object-side surface; a negative second lens element having a concave object-side surface and a convex image-side surface; a positive third lens element having a convex object-side surface and a convex image-side surface; a plastic negative fourth lens element having a concave object-side surface and a convex image-side surface, with both the object-side and image-side surfaces thereof being aspheric. By such arrangement, the incident angle of off-axis light projected onto the sensor can be suppressed for improving the sensitivity of the sensor effectively. Also, a sufficient back focal length can be retained for disposing other optical elements (e.g., an IR-pass filter), and thereby the system can be more suitable for the infrared aspect of optical imaging systems.

Abstract: This invention provides an image capturing lens system in order from an object side to an image side comprising five lens elements with refractive power: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with both the object-side and image-side surfaces thereof being aspheric; a plastic fourth lens element with both the object-side and image-side surfaces thereof being aspheric; and a plastic fifth lens element having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof. By such arrangement, the lens system of the invention has larger chief ray angle, and thereby not only the total track length of the system can be reduced, but also better image quality can be obtained.

Abstract: A wide viewing angle optical lens assembly comprises, 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 positive refractive power having a convex object-side surface, a third lens element with positive refractive power having a convex image-side surface. By adjusting the relationship among the above-mentioned lens elements, the wide viewing angle optical lens assembly can effectively reduce its size, obtain greater angle of view as well as superior imaging quality.

Abstract: This invention provides an image capturing lens system in order from an object side to an image side comprising four non-cemented lens elements with refractive power: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave image-side surface; a plastic third lens element having a concave object-side surface and a convex image-side surface, both the object-side and image-side surfaces thereof being aspheric; and a plastic fourth lens element with negative refractive power having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof; wherein the image capturing lens system comprises a stop positioned between the first lens element and the second lens element.

Abstract: An optical lens assembly for image pickup, sequentially arranged from an object side to an image side along the optical axis, comprising: the first lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the second lens element with positive refractive power has bi-convex surfaces; and the third lens element with negative refractive power, made of plastic, and which has a convex object-side surface and a concave image-side surface with at least one thereof is aspheric. By such arrangements, the optical lens assembly for image pickup satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

Abstract: An image lens assembly includes, in order from an object side to an image side, the first lens element with positive refractive power having a convex object-side surface, the second lens element with negative refractive power, the third lens element with refractive power, the fourth lens element with positive refractive power made of plastic material, the fifth lens element with negative refractive power made of plastic material. At least one surface of the third lens element, the fourth lens element and the fifth lens element are aspheric.