Abstract: A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An electronic device includes a lens system including four lens elements. the four lens elements are, in order from an outer side to an inner side, a first lens element, a second lens element, a third lens element and a fourth lens element. The second lens element has negative refractive power. The fourth lens element has positive refractive power. At least one surface of the four lens elements has at least one inflection point. A projection device and a detecting module of the electronic device including the lens system are also disclosed.

Abstract: An image capturing lens system includes, in order from an object side to an image side, a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, a third lens element with positive refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, and a fourth lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.

Abstract: A camera lens is disclosed. The camera lens includes: a first lens with positive refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with negative refractive power, which are arranged sequentially from an object side. The camera lens is characterized in that it satisfies specified conditions.

Abstract: This invention provides an optical lens assembly including, in order from an object side to an image side: a first lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof; a second lens element having positive refractive power; a third lens element having an object-side surface being concave in a paraxial region thereof; and a fourth lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface thereof having at least one convex shape in an off-axis region thereof; wherein the optical lens assembly has a total of four lens elements. With such configuration, the optical lens assembly is characterized by a reduced size and a wide field of view.

Abstract: An optical image capturing assembly includes four lens elements, in order from an object side to an image side, the four lens elements are a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof.

Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.

Abstract: Disclosed are an imaging lens having satisfactory performance in a region of near infrared light, and an imaging apparatus including the imaging lens. The imaging lens includes, in order from an object side, as lenses having refractive power, only four lenses including a positive first lens L1, a negative second lens L2, a positive third lens L3, and a positive fourth lens L4. A conditional expression relating to a focal length fs1 of the first lens L1 with respect to s-line and a focal length fs of the entire system with respect to s-line: 0.5<fs1/fs<2.5 is satisfied.

Abstract: A four-piece 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, a second lens element with a negative refractive power, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power. Such arrangements not only can be applied to a portable electronic product, but also has a long focal length, high pixel and low height.

Abstract: A four-piece infrared single wavelength lens system, in order from an object side to an image side, includes: an aperture stop; a first lens element with a positive refractive power having an object-side surface being convex and an image-side surface being concave near the optical axis; a second lens element with a positive refractive power having an object-side surface being concave and an image-side surface being convex near the optical axis; a third lens element with a refractive power having an object-side surface being concave and an image-side surface being convex near the optical axis; and a fourth lens element with a refractive power having an object-side surface being convex and an image-side surface being concave near the optical axis, and at least one inflection point being formed on one of the object-side surface and the image-side surface of the fourth lens element.

Abstract: An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is disclosed. The first lens element has negative refractive power. The second through third lens elements have refractive power. The fourth lens element has positive refractive power. At least one of the image side surface and the object side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: A four-piece optical lens for capturing image and a four-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with positive refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a positive refractive power, a stop, a second lens element with a refractive power, a third lens element with a positive refractive power, and a fourth lens element with a negative refractive power. The focal length of the first lens element is f1, the focal length of the second lens element and the third lens element combined is f23, and they satisfy the relation: 0.05<f1/f23<1.8. When the above relation is satisfied, a wide field of view can be obtained and the resolution can be improved evidently.

Abstract: An image forming lens system includes an aperture stop, and an image-side lens unit group which is disposed on an image side of the aperture stop. The image-side lens unit group includes a first image-side lens unit having a negative refractive power, a second image-side lens unit having a positive refractive power, and a third image-side lens unit having a negative refractive power. Any one of the first image-side lens unit, the second image side lens unit, and the third image-side lens unit is a focusing lens unit which moves along the optical axis at the time of focusing, and the following conditional expression (1) is satisfied: 0.06<|ffo/f|<0.4??(1) where, f denotes a focal length of the image forming lens system at the time of focusing at an object at infinity, and ffo denotes a focal length of the focusing lens unit.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, 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. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

Abstract: A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

Abstract: An optical imaging lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refractive power. The second lens element has negative refractive power. The fourth lens element has an object-side surface being concave in a paraxial region thereof, wherein at least one of the object-side surface and an image-side surface of the fourth lens element has at least one inflection point. The optical imaging lens system has a total of four lens elements.

Abstract: A projection lens assembly includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in order from a projection side to an image source side along an optical axis. The first lens group is with negative refractive power. The second lens group is with positive refractive power and includes a projection side surface and an image source side surface, wherein both of the projection side surface and the image source side surface are convex surfaces. The third lens group includes a convex surface facing the projection side. The fourth lens group is with positive refractive power and includes a convex surface facing the image source side. The projection lens assembly satisfies: 1.4<F<3.5, wherein F is an F-number of the projection lens assembly.

Abstract: The present disclosure provides an image capturing optical system comprising: a positive first lens element having a convex object-side surface; a negative second lens element having a concave object-side surface; a third lens element; a fourth lens element having a convex object-side surface and a concave image-side surface, the object-side surface and the image-side surface thereof being aspheric; a fifth lens element having a concave image-side surface concave, both of the object-side surface and the image-side surface being aspheric, at least one of the object-side surface and the image-side surface having at least one convex shape in an off-axis region thereof.

Abstract: An optical lens system comprises, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, and a fourth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with refractive power has an image-side surface being convex in a paraxial region. The third lens element with positive refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. The fourth lens element with refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. There are a total of four lens elements with refractive power in the optical lens system.

Abstract: First to third lens groups that are formed of anamorphic lenses having positive power and anamorphic lenses having negative power combined with one another and allow the distances between the anamorphic lenses to be changed cooperate with one another to allow field curvature to be changed both in the meridian direction and the sagittal direction.

Abstract: A photographing optical lens assembly includes, in order form an object side to an image side, a first lens element, a second lens element, a third lens element, and a fourth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element has negative refractive power. The third lens element with refractive power has an object-side surface being concave in a paraxial region, and the object-side surface and an image-side surface are both aspheric. The fourth lens element with negative refractive power has an object-side surface being concave in a paraxial region, and an image-side surface being convex in a paraxial region, the object-side surface and the image-side surface are both aspheric.

Abstract: The present disclosure relates to the field of optical lens, and discloses an optical camera lens, which includes: an aperture, a first lens having positive refraction power, a second lens having negative refraction power, a third lens having positive refraction power, a fourth lens having negative refraction power and a fifth lens having negative refraction power; the optical camera lens satisfies following relational expressions: 0.4<f1/f<0.55, ?0.8<f2/f<?0.7, 2.0<f3/f<2.3, ?1.9<f4/f<?1.7, ?1.6<f5/f<?1.2, 0.3<f2/f4<0.45. The optical camera lens provided by the present disclosure can meet the design requirements on low TTL and large aperture, which can effectively weaken the background and highlight the focusing object.

Abstract: An optical system for an image acquisition device comprises a filter comprising a central aperture arranged to transmit both visible and selected near infra-red (NIR) wavelengths and a peripheral aperture arranged to block visible wavelengths and to transmit the NIR wavelengths. An image sensor comprises an array of pixels including pixels sensitive to visible wavelengths and corresponding pixels sensitive to the NIR wavelengths. A lens assembly is axially located between the filter and the image sensor and comprises a plurality of lens elements. The lens elements are arranged to simultaneously focus NIR light received from a given object through central and peripheral apertures of the filter and visible light received from the object through the central aperture onto the sensor surface.

Abstract: A three-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a positive refractive power, and a third lens element with a positive refractive power. The focal length of the first lens element is f1, the focal length of the second lens element and the third lens element combined is f23, and they satisfy the relation: 0.5<f1/f23<1.0. When the above relation is satisfied, a wide field of view can be obtained and the resolution can be improved evidently.

Abstract: An optical lens system with a wide field of view includes, in order from the object side to the image side: a stop; a first lens element with a positive refractive power having a convex image-side surface and at least one aspheric surface; a second lens element with a negative refractive power having a concave image-side surface and at least one aspheric surface; a third lens element with a positive refractive power having a concave object-side surface and at least one aspheric surface; and a fourth lens element with a negative refractive power having a convex object-side surface and at least one aspheric surface, at least one of the object-side and the image-side surfaces of the fourth lens element is formed with an inflection point.

Abstract: An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is provided. The first lens element has positive refractive power. The second through third lens elements have refractive power. The fourth lens element has negative refractive power. At least one of the image side surface and the object side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: A four-piece optical lens for capturing image and a four-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with positive refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is provided. The first lens element has positive refractive power. The second through third lens elements have refractive power. The fourth lens element has negative refractive power. At least one of the image side surface and the object side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: Present embodiments provide for an optical imaging lens. The optical imaging lens comprises a first lens element, a second lens element, a third lens element, and a fourth lens element positioned in an order from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may exhibit better optical characteristics and an enlarged field angle, and the total length of the optical imaging lens may be shortened.

Abstract: The present disclosure relates to the field of optical lens, and discloses an optical camera lens, which includes: an aperture, a first lens having positive refraction power, a second lens having negative refraction power, a third lens having positive refraction power, a fourth lens having negative refraction power and a fifth lens having negative refraction power; the optical camera lens satisfies following relational expressions: 0.45<f1/f<0.55, ?0.85<f2/f<?0.75, 2.0<f3/f<2.3, ?3.4<f4/f<?3, ?1.3<f5/f<?1.1, 0.2<f2/f4<0.3. The optical camera lens provided by the present disclosure can meet the design requirements on low TTL and large aperture, which has good sensitivity performance.

Abstract: An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An image capturing lens system includes, in order from an object side to an image side, a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, a third lens element with positive refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, and a fourth lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: A four piece optical lens for capturing image and a five-piece optical module for capturing image, includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power, in order from an object side to an image side, the optical lens along the optical axis. At least one of the image-side surface and object-side surface of each of the four lenses is aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

Abstract: A first optical imaging system includes, in order from the object side to the image side, a first lens element, a second lens element, and a third lens element, arranged along an optical axis. A second optical imaging system includes, in order from the object side to the image side, a first lens element, a second lens element, a third lens element, and a fourth lens element, arranged along an optical axis. A third optical imaging system is a telecentric lens system having only lens elements having a refractive power and a chief ray angle smaller than 1 degree. The lens elements of the optical imaging systems may be made of the same material having absorption in visible wavelengths and high transmission in near infrared radiation. The lens elements may be coated with an antireflective coating that is optimized for near infrared radiation.

Abstract: An optical lens comprising a first lens (L1), a second lens (L2), and a third lens (L3) that are sequentially arranged on a common optical axis in the transmission direction of an incident light. Both the first lens and the second lens are positive plano-convex lenses. The third lens is a negative meniscus lens. The first lens comprises a first curved surface (S1) and a second curved surface (S2). The second lens comprises a third curved surface (S3) and a fourth curved surface (S4). The third lens comprises a fifth curved surface (S5) and a sixth curved surface (S6). The two curved surfaces of each lens respectively are the light incident surface and the light exit surface of the lens. The first to the sixth curved surfaces are sequentially arranged in the transmission direction of the incident light. The first curved surface and the third curved surface protrude in reverse to the transmission direction of the incident light.

Abstract: The present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having a positive (+) refractive power, a second lens having a negative (?) refractive power, a third lens having a positive (+) refractive power, and a fourth lens having a negative (?) refractive power and having a negative (?) refractive power from a lens center to a lens ambience.

Abstract: Embodiments provide an image pickup lens including a first lens to a fourth lens arranged in sequence from an object side to an image side, the first lens to the fourth lens each having refraction. The first lens and the second lens have negative refraction. The first lens has a second surface facing the image side, and a ratio of an effective radius to a radius of curvature in relation to the second surface is less than 0.96. The first lens, the second lens, and the fourth lens are formed of plastic.

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

Abstract: An imaging lens includes: a first lens having positive refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a sixth lens having positive or negative refractive power in vicinity of an optical axis, a peripheral portion of a surface on an image side of the sixth lens including one or more inflection points, the first to sixth lenses being provided in order from an object side.

Abstract: An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is provided. The first lens element has negative refractive power. The second through third lens elements have refractive power. The fourth lens element has positive refractive power. At least one of the image side surface and the object side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An imaging lens system includes, in order from an object side to an image side, 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 in a paraxial region thereof. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element has negative refractive power. The imaging lens system has a total of four lens elements, and the imaging lens system further includes an aperture stop disposed between the second lens element and the third lens element.

Abstract: An imaging optical system includes, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element having negative refractive power; a third lens element having an object-side surface being concave in a paraxial region thereof, both of the object-side surface and an image-side surface thereof being aspheric; and a fourth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, both of the object-side and image-side surfaces thereof being aspheric. There are a total of four lens elements in the imaging optical system, and an air gap is arranged between every two adjacent lens elements.

Abstract: the An optical imaging lens includes four lens elements positioned in order from object side to the image side of the optical imaging lens. Through controlling the convex or concave shape of the surfaces of lens elements, the refracting power of lens elements, the thickness of the at least one lens element, one or more air gaps between lens elements along the optical axis, and a half field of view HFOV of the optical imaging lens, an embodiment satisfies the relation: 4.21?T3/(G12×tan(HFOV))?7.55, for which T3 is the thickness of the third lens element and G12 is the air gap between the first lens element and the second lens element. The optical imaging lens provided by embodiments of the present invention has better optical characteristics and a reduced total length in comparison to conventional lenses.

Abstract: An imaging 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 with negative refractive power has an image-side surface being concave. The second lens element has an object-side surface being concave and an image-side surface being convex. The third lens element has an object-side surface being concave and an image-side surface being convex. The fourth lens element with positive refractive power has an image-side surface being convex. The fifth lens element with negative refractive power has an object-side surface being concave.

Abstract: An imaging lens assembly includes, in order from an object side to an image side, a first lens element (100), a second lens element (120), a third lens element (130), and a fourth lens element (140). The first lens element (110) with positive refractive power has an object-side surface (111) being convex. The second lens element (120) with negative refractive power has an object-side surface (121) being concave. The third lens element (130) with positive refractive power has an object-side surface (131) and an image-side surface (132) being both aspheric. The fourth lens element (140) with refractive power has an object-side surface (141) and an image-side surface (142) being aspheric.