Abstract: A photographing system 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 and a fourth lens element. Each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one surface of at least one lens element in the photographing system lens assembly has at least one inflection point. The first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, and the image-side surface of the first lens element is convex in a paraxial region thereof. The object-side surface of the second lens element is concave in a paraxial region thereof. The image-side surface of the third lens element is concave in a paraxial region thereof.

Abstract: A photography optical lens assembly includes four lens elements which are, 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. Each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The third lens element has positive refractive power, the object-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element is convex in a paraxial region thereof. The object-side surface and the image-side surface of the third lens element are both aspheric. At least one of the object-side surface and the image-side surface of the third lens element has at least one inflection point.

Abstract: An optical imaging lens system includes, in order from an object side to an image side along an optical path: a first optical element, a second optical element, a third optical element, a fourth optical element, a fifth optical element, a sixth optical element and a seventh optical element. The first optical element is a reflective element. The second optical element to the seventh optical element are lens elements. The first optical element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The third optical element has negative refractive power. The seventh optical element has an object-side surface being convex in a paraxial region thereof. At least one of an object-side surface and an image-side surface of the seventh lens element has at least one inflection point.

Abstract: This disclosure provides a lens assembly that has an optical path and includes a lens element and a light-blocking membrane layer. The lens element has an optical portion, and the optical path passes through the optical portion. The light-blocking membrane layer is coated on the lens element and adjacent to the optical portion. The light-blocking membrane layer has a distal side and a proximal side that is located closer to the optical portion than the distal side. The proximal side includes two extension structures and a recessed structure. Each of the extension structures extends along a direction away from the distal side, and the extension structures are not overlapped with each other in a direction in parallel with the optical path. The recessed structure is connected to the extension structures and recessed along a direction towards the distal side.

Abstract: A light path folding element includes a first surface, a second surface, a first reflecting surface and a second reflecting surface. A light travels from the first surface into the light path folding element. The second surface is disposed relative to the first surface along a first direction and is parallel to the first surface, and the first direction is perpendicular to the first surface. The first reflecting surface connects the first surface and the second surface, an acute angle is formed between the first reflecting surface and the first surface, and the light forms an internal reflection via the first reflecting surface. The light forms another internal reflection via the second reflecting surface. The light path folding element further includes a light blocking structure, which extends from at least one of the first surface and the second surface into the light path folding element.

Abstract: An optical photographing lens assembly includes seven lens elements which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The object-side surface of the first lens element is convex in a paraxial region thereof. The second lens element has positive refractive power. The third lens element has negative refractive power. The image-side surface of the third lens element is concave in a paraxial region thereof. The image-side surface of the seventh lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the seven lens elements has at least one inflection point.

Abstract: An imaging lens includes a plurality of lens elements sequentially arranged from an object side to an image side along an optical path, and a central axis of the imaging lens passes through a center of each of plurality of lens elements. The plurality of lens elements include a center-shielding lens element, and the center-shielding lens element includes a first optical surface and a second optical surface. The central axis passes through the first optical surface, and the second optical surface is disposed opposite to the first optical surface. The second optical surface includes a center-shielding region and an optical transmission region. The central axis passes through the center-shielding region, and the center-shielding region includes a light-shielding layer. The optical transmission region is disposed adjacent to and surrounds the center-shielding region. An inner side and an outer side of the center-shielding region both have low reflectivity characteristics.

Abstract: A photographing optical lens system includes five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each lens element has an object-side surface facing the object side and an image-side surface facing the image side. The first lens element has positive refractive power and the object-side surface being convex in a paraxial region thereof. The image-side surface of the third lens element is convex in a paraxial region thereof. The object-side surface of the fourth lens element is convex in a paraxial region thereof. The fifth lens element has negative refractive power, the object-side surface being convex, and the image-side surface being concave in a paraxial region thereof.

Abstract: A photographing optical lens assembly includes six lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has negative refractive power. The object-side surface of the second lens element is concave in a paraxial region thereof. The image-side surface of the third lens element is concave in a paraxial region thereof.

Abstract: An imaging lens assembly includes a first plastic lens element and a second plastic lens element arranged along an optical axis. The first plastic lens element includes, in order from a paraxial region to a peripheral region, a first optically effective portion, a first size reduction portion and a first peripheral portion. An object-side surface and an image-side surface of the first size reduction portion each has a roughened surface. The first peripheral portion is to be in physical contact and assembled with adjacent components. The second plastic lens element includes, in order from a paraxial region to a peripheral region, a second optically effective portion, a second size reduction portion and a second peripheral portion. An object-side surface and an image-side surface of the second size reduction portion each has a roughened surface. The second peripheral portion is to be in physical contact and assembled with adjacent components.

Abstract: An optical imaging module includes an optical imaging lens assembly, a light path folding element and a light blocking element. The optical imaging lens assembly includes at least one optical lens element. The light path folding element has an incident surface, an emitting surface and at least one optical reflecting surface, and the light path folding element is disposed on an image side of the optical imaging lens assembly. The light blocking element is disposed on one of the optical lens element and the light path folding element, and the light blocking element includes an opening hole and a light blocking surface. The light blocking surface has an anti-reflective light blocking membrane layer. A surface of the anti-reflective light blocking membrane layer has a plurality of nanostructures, and the nanostructures are arranged in an irregular form.

Abstract: An optical lens assembly includes at least two optical lens elements. At least one of the optical lens elements includes a long wavelength absorbing material, the optical lens element including the long wavelength absorbing material is made of a plastic material, and the long wavelength absorbing material is evenly mixed with the plastic material. At least one of the optical lens elements includes a long wavelength filter coating, the optical lens element including the long wavelength filter coating is made of a plastic material, and the long wavelength filter coating is arranged on an object-side surface or an image-side surface of the optical lens element. The long wavelength filter coating includes a plurality of high refractive index coating layers and a plurality of low refractive index coating layers, and the high refractive index coating layers and the low refractive index coating layers are stacked in alternations.

Abstract: An optical imaging lens assembly includes four lens elements which are, in order from an object side to an image side along an optical path: 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 an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. 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 and an image-side surface being convex in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the optical imaging lens assembly has at least one inflection point.

Abstract: A photographing lens assembly includes six lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has an object-side surface being convex in a paraxial region thereof. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface having an inflection point. The photographing lens assembly further includes an aperture stop disposed between the second lens element and the third lens element.

Abstract: An imaging lens includes lens elements arranged along an optical axis, a lens barrel, a first opening element and a second opening element. The lens elements include a first lens element. The lens barrel includes a tube portion surrounding the optical axis, with the lens elements disposed therein and an opening portion extending along a direction from the tube portion towards the optical axis. The opening portion has a barrel opening located on an object side of the first lens element and a first step surface. The first opening element is disposed between the first lens element and the opening portion to space the first lens element apart from the opening portion. The first opening element and the first step surface form a gap therebetween in which the second opening element is disposed. The first and second opening elements each have a light-passable opening.

Abstract: A photographing optical 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, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The second lens element has positive refractive power. The eighth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the eighth lens element has at least one convex shape in an off-axis region thereof, and both an object-side surface and the image-side surface thereof are aspheric. The photographing optical lens system has a total of eight lens elements. An air gap in a paraxial region is located between every two lens elements of the photographing optical lens system that are adjacent to each other.

Abstract: An imaging lens module includes a lens element having an optical axis, a lens carrier and a variable through hole assembly. The lens carrier accommodates the lens element and sequentially includes an object-side portion, an image-side portion and a tubular portion. The object-side portion configured for light entering the imaging lens module forms a minimum opening of the lens carrier. The variable through hole assembly is disposed on the object-side portion and includes rotatable blades rotatably disposed about the optical axis and configured to form a through hole with a variable size. Moreover, the object-side portion further has a guiding structure guiding the movement of the rotatable blades and located further away from the optical axis than the minimum opening. Moreover, the object-side portion and the image-side portion form an air sleeve therebetween, and the air sleeve is located further away from the optical axis than the tubular portion.

Abstract: An imaging optical system 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 refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The second lens element with positive refractive power has an image-side surface being convex in a paraxial region. The third lens element with negative refractive power has an image-side surface being concave in a paraxial region. The fourth lens element with positive refractive power has an image-side surface being convex in a paraxial region. The fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region and having a convex shape in an off-axial region thereof.

Abstract: An imaging system lens assembly includes a first lens group and a second lens group. The first lens group includes a first catadioptric lens element and a second catadioptric lens element, the second lens group includes at least one lens element. Each of an object-side surface and an image-side surface of the first catadioptric lens element and the second catadioptric lens element includes a central region and a peripheral region. The peripheral region of the object-side surface of the first catadioptric lens element includes a first refracting surface. The peripheral region of the image-side surface of the second catadioptric lens element includes a first reflecting surface. The central region of the object-side surface of the first catadioptric lens element includes a second reflecting surface. The central region of the image-side surface of the second catadioptric lens element includes a last refracting surface.

Abstract: A photographing lens system includes five lens elements which are, in order from an object side to an image side along an optical path: 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 an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. The fifth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof.