ASIA OPTICAL CO., INC.

A pattern structure and a sight utilizing the pattern structure are provided. The pattern structure includes a first pattern and a second pattern. The first pattern is corresponded to a first geometric shape and has a first color. The second pattern is corresponded to a second geometric shape. The inner edge of the second pattern is placed corresponding to the outer edge of the first pattern. The outer edge of the first pattern and the inner edge of the second pattern have a first characteristic interval therebetween that is uniform. The second pattern includes a first end, a second end disposed opposite to the first end, and an inner edge connecting the first end and the second end. The first end and the second end have a second characteristic interval therebetween.

A lens assembly includes a first lens, a second lens, a third lens, and a fourth lens. The first lens is with positive refractive power and includes a convex surface facing an object side. The second lens is with refractive power. The third lens is a meniscus lens with positive refractive power and includes a concave surface facing the object side and a convex surface facing an image side. The fourth lens is with negative refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, and the fourth lens are arranged in order from the object side to the image side along an optical axis.

A lens assembly, in sequence from an object side to an image side, includes an optical element including a plurality of pairs of nanostructures, and an image sensing element including a plurality of pairs of pixel areas. Each pair of nanostructures includes a first view nanostructure and a second view nanostructure. Each pair of pixel areas includes a first view pixel area and a second view pixel area. The first view nanostructure guides a light from the object to form an image of the object on the first view pixel area and the second view nanostructure guides a light from the object to form an image of the object on the second view pixel area.

A double lens-barrel device includes a first lens barrel, a second lens barrel, an intermediate connecting portion and a distance detecting element. The intermediate connecting portion is disposed between the first lens barrel and the second lens barrel. The first lens barrel is fixed to the intermediate connecting portion. The second lens barrel is movable with respect to the intermediate connecting portion for changing the distance between the first lens barrel and the second lens barrel. The distance detecting element is only disposed between the second barrel portion and the intermediate connecting portion to detect a change of distance between a first optical axis of the first lens barrel and a second optical axis of the second lens barrel. The first optical axis and the second optical axis are perpendicularly connected to a reference line.

An optical device includes a prism module, a base element connected to the prism module, a first optical element, a first optical element carrier, and an adjustment assembly. The first optical element carrier is connected to the base element and carries the first optical element. The adjustment assembly includes an adjustable element, an elastic element, and a connecting element. The adjustable element and the connecting element respectively pass through the first optical element carrier and are movably connected to the base element. The elastic element is placed between and against the first optical element carrier and the base element. The first optical element carrier is moved along the connecting element or is rotated about the connecting element, when the adjustable element is adjusted relative to the base element to adjust an elastic force of the elastic element applied to the first optical element carrier and the base element.

A lens device includes a lens group unit, a guiding unit, a transmission unit and a driving unit. The guiding unit is connected to the lens group unit for guiding the lens group unit to move in a first direction or in a second direction. The transmission unit includes a fixing element. The driving unit is connected to the transmission unit so as to output power for driving the lens group unit through the transmission unit to move in the first direction X or in the second direction. The fixing element includes a body portion and a bent portion, and the bent portion extends from the body portion to form a space between the fixing element and the lens group unit.

A lens structure includes a first lens, a second lens and a first spacer. The first lens includes a first surface, a second surface opposite to the first surface and a first outer circumferential surface connecting the first surface and the second surface. The second lens includes a third surface, a fourth surface opposite to the third surface and a second outer circumferential surface connecting the third surface and the fourth surface. The first spacer is annular and includes a first end surface and a second end surface. The first end surface is connected to the first surface, and the second end surface is connected to the second surface, whereby the first lens is connected to the second lens through the first spacer.

A wide-angle lens assembly includes a first, a second, a third, a fourth, a fifth, a sixth, a seventh, an eighth, a ninth, and a tenth lenses, all of which are arranged in order from an object side to an image side along an optical axis. The first lens is a meniscus lens with negative refractive power. The second lens is with refractive power. The third lens is with negative refractive power. The fourth, seventh, and ninth lenses are with positive refractive power. The fifth lens is a meniscus lens with refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The sixth lens includes a convex surface facing the object side. The eighth lens includes a concave surface facing the image side. The tenth lens is with positive refractive power and includes a convex surface facing the object side.

A lens assembly includes a first lens group, a second lens group, and a third lens group, all of which are arranged in order from a first side to a second side along an optical axis. The first lens group is with positive refractive power. The second lens group is with positive refractive power. The third lens group is with positive refractive power. The first lens group is fixed, the second lens group can move along the optical axis, and the third lens group can move along the optical axis, so that the lens assembly is zoomed from a wide-angle end to a telephoto end to change an effective focal length.

A lens module includes an optical prism. The optical prism includes a prism body and at least one recess structure. The prism body includes a first surface, a second surface, a third surface and a fourth surface, wherein the first surface and the third surface are opposite, the second surface and the fourth surface are opposite, the first surface is adjacent to the second surface and the fourth surface, and the third surface is adjacent to the second surface and the fourth surface. A light beam enters the prism body through the first surface, undergoes multiple total internal reflections in the prism body, and leaves the prism body through the fourth surface. The recess structure is formed on the prism body, and extended from the surfaces of the prism body to the interior.