An optical imaging lens may include a first, a second, a third, a fourth, a fifth, a sixth, and a seventh lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of lens elements, the optical imaging lens may provide great resolution along with enlarged aperture stop and image height.

An optical imaging system includes a first lens, a second lens, and a third lens disposed in order from an object side. The optical imaging system satisfies 1.2 mm<TTL<2.0 mm and 0<f3/f<1.0, where TTL is a distance from an object-side surface of the first lens to an imaging plane, f is a focal length of the optical imaging system, and f3 is a focal length of the third lens.

Device for shaping laser radiation (10a, 10c), comprising a component (1) having an entrance face (2) and an exit face (3), a first lens array (4) on the entrance face (2) with a plurality of lenses (5a, 5c, 5e) juxtaposed in the X-direction, and a second lens array (6) on the exit face (3) with a plurality of lenses (7a, 7c, 7e) juxtaposed in the Y-direction, wherein the laser radiation (10a, 10c) is deflected by a first one of the lenses (5a, 5c, 5e) of the first lens array (4) with respect to the X- and Y-direction by a different angle than from a second one of the lenses (5a, 5c, 5e) of the first lens array (4), and/or wherein the laser radiation (10a, 10c) is deflected by a first of the lenses (7a, 7c, 7e) of the second lens array (6) with respect to the X- and Y-direction by a different angle than by a second one of the lenses (7a, 7c, 7e) of the second lens array (6).

The present invention discloses a method of forming an optical sheet. The optical sheet comprises a substrate and a film. The substrate has a first surface and a second surface opposite to the first surface. The film has a third surface and a fourth surface opposite to the third surface. The third surface of the film is on the first surface of the substrate. The fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second convex or concave shapes superimposed on the plurality of first convex shapes.

The present invention discloses a method of forming an optical sheet. The method comprises: providing a mold having a first surface; forming a plurality of first concave shapes on the first surface of the mold such that the first surface of the mold is changed to a second surface of the mold; forming a plurality of second shapes on the plurality of first concave shapes such that the second surface of the mold is changed to a third surface of the mold; and using the third surface of the mold to emboss a film on a substrate to form a composite structure corresponding to the combination of the plurality of first concave shapes and the plurality of second shapes.

An illumination device has a coherent light source, an optical device that diffuses the plurality of coherent light beams and illuminates a predetermined illumination area, and a timing control unit that individually controls incident timing of the plurality of coherent light beams to the optical device or illumination timing of the illumination area, wherein the optical device has a plurality of diffusion regions, the diffusion regions being provided corresponding to the plurality of coherent light beams, the plurality of diffusion regions illuminate the illumination range by diffusion of incident coherent light beams, the plurality of diffusion regions have a plurality of element diffusion regions, the plurality of element diffusion regions illuminate partial regions in the illumination area by diffusion of incident coherent light beams, and at least parts of the partial regions illuminated by the plurality of element diffusion regions are different from one another.

A device configured for radiating a focused electromagnetic beam is proposed. Such device comprises: —a first (101) and a second (102) part having respectively a second n.sub.2 and third n.sub.3 refractive index and a first W.sub.1 and second W.sub.2; —a first contact area (100e1) intended to be between a host medium having a first refractive index n1 and in which the micro or nanoparticles are intended to be trapped or moved by a focused electromagnetic beam radiated by the device; —a second contact area (100e2) between the first part and the second part; and —a third contact area (100e3) intended to be between the second part and the host medium. The focused electromagnetic beam results from a combination of at least two beams among a first (NJ1), a second (NJ2) and a third (NJ3) jet beams radiated respectively by the first, second and third contact areas when an incoming electromagnetic wave (IEM) illuminates the device. The device is configured for having a direction of propagation of the focused electromagnetic beam tilted in respect of a direction of propagation of the incoming electromagnetic wave.

A light emitting device includes a substrate, a plurality of light emitting elements arranged in three or more rows on the substrate, and a light-transmissive member including a cylindrical lens portion having an array of three or more cylindrical lenses arranged parallel to each other along the rows of the light emitting elements so that each of the cylindrical lenses is on one of the three or more rows of light emitting elements. The rows of the light emitting elements are arranged with substantially uniform intervals. The cylindrical lens portion includes first cylindrical lens portions including at least cylindrical lenses at outermost sides of the array, and a second cylindrical lens portion arranged at an inner side of the first cylindrical lens portions and having a height greatest in the cylindrical lens portion.

There is provided a lens array and an lens array capable of suitably preventing irregular brightness without reducing resolution. A micro lens array of a screen includes upper-level microlenses and lower-level microlenses which are formed on the incidence surface of the screen, which have the same effective diameter, and which have a structure that generates an optical path length difference Δ in transmission light. By disposing the upper-level microlenses and the lower-level microlenses at an interval based on the effective diameter, the basic periodic structure of a lens period is formed. Further, the upper-level microlenses and the lower-level microlenses form a basic block comprising a combination of the lenses having a structure that generates the optical path length difference. A concave-and-convex period PC based on the basic block is an integer multiple of the lens period.

Embodiments comprise a system created through fabricating a lens array through which lasers are emitted. The lens array may be fabricated in the semiconductor substrate used for fabricating the lasers or may be a separate substrate of other transparent material that would be aligned to the lasers. In some embodiments, more lenses may be produced than will eventually be used by the lasers. The inner portion of the substrate may be formed with the lenses that will be used for emitting lasers, and the outer portion of the substrate may be formed with lenses that will not be used for emitting lasers—rather, through etching these additional lenses, the inner lenses may be created with a higher quality.