Abstract: An image pickup lens having the following disposed from an object side in the order listed below: a first lens having a negative meniscus shape with a concave surface on an image side, a second lens having a negative meniscus shape with a concave surface on the object side adjacent to an optical axis, a third positive lens having a convex surface on the image side adjacent to the optical axis, an aperture, and a fourth lens having a bi-convex shape adjacent to the optical axis. Each of the second, third, and fourth lenses has an aspherical surface on each side.

Abstract: An imaging lens includes a first lens, a second lens, a third lens, an aperture stop, and a fourth lens, sequentially arranged from the object-side of the imaging lens. The first lens has negative power, and an object-side surface is convex and an image-side surface is concave. Both surfaces of the second lens are aspheric, and in the vicinity of the optical axis, the second lens has negative power, and the object-side surface is convex and the image-side surface is concave. Both surfaces of the third lens are aspheric, and in the vicinity of the optical axis, the third lens has positive power, and the object-side surface is convex, and the image-side surface is concave. Both surfaces of the fourth lens are aspheric, and in the vicinity of the optical axis, the fourth lens has positive power, and the object-side surface is concave, and the image-side surface is convex.

Abstract: An imaging lens includes a first lens, a second lens, a third lens, an aperture stop, and a fourth lens, sequentially arranged from the object-side. The first lens has negative power, and an object-side surface is convex and an image-side surface is concave. Both surfaces of the second lens are aspheric, and in the vicinity of the optical axis, the second lens has negative power, and the object-side surface is concave and the image-side surface is convex. Both surfaces of the third lens are aspheric, and in the vicinity of the optical axis, the third lens has positive power, and the object-side surface is convex, and the image-side surface is convex. Both surfaces of the fourth lens are aspheric, and in the vicinity of the optical axis, the fourth lens has positive power, and the object-side surface is concave, and the image-side surface is convex.

Abstract: An imaging lens includes a first lens, second lens, third lens, aperture stop, and fourth lens, sequentially arranged from the object-side. The first lens has negative power, and an object-side surface is convex and an image-side surface is concave. Both surfaces of the second lens are aspheric, and in the vicinity of the optical axis, the second lens has negative power, and the object-side surface is concave and the image-side surface is concave. Both surfaces of the third lens are aspheric, and in the vicinity of the optical axis, the third lens has positive power, and the object-side surface is convex, and the image-side surface is convex. Both surfaces of the fourth lens are aspheric, and in the vicinity of the optical axis, the fourth lens has positive power, and the object-side surface is concave, and the image-side surface is convex. Formula (1) about curvature radii is satisfied.

Abstract: In a surveillance camera 2, an optical system unit for use in imaging is provided with a first lens 7, a second lens 8, a third lens 9, and a fourth lens 10, and a subject image is formed on a photoelectric surface 12 of an imaging element through a cover glass 11. The third lens 9 is an optical lens made of a nanocomposite material of the invention in which inorganic fine particles are dispersed. A thin film layer 15 that blocks UV rays is formed on a light incident surface of the third lens 9. After passing through the first lens 7 and the second lens 8, UV rays contained in subject light are blocked by the thin film layer 15 and therefore cannot enter the third lens 9.

Abstract: A first lens group having a positive refractive power, an aperture stop, and a second lens group having a positive refractive power are provided in order from an object side. The first lens group includes, in order from the object side, a first lens that is a negative meniscus lens having a convex surface directed toward the object side, a negative second lens whose surface on an image side has a concave shape, and a positive third lens whose surface on the image side has a convex shape directed toward the image side. The second lens group includes, in order from the object side, a positive fourth lens whose surface on the image side has a convex shape directed toward the image side, a negative fifth lens having a biconcave shape, and a positive sixth lens having a biconvex shape. The fifth lens and the sixth lens are cemented together.

Abstract: An ultra wide-angle imaging lens device 1 includes, in order from an object side: a negative first lens L1 having a meniscus shape with a convex surface directed to the object side; a negative second lens L2 having a concave surface directed to an image side and having at least one aspheric surface; a positive third lens L3 having a convex surface directed to the object side and having at least one aspheric surface; a stop; and a positive fourth lens L4 having a convex surface directed to the image side and having at least one aspheric surface. The following conditional expression (1) is satisfied: ?3.2<L/f34<3.2??(1) where L denotes a distance on an optical axis from an object side surface of the first lens to an image formation surface, and f34 denotes a composite focal length of the third and fourth lenses L3 and L4.

Abstract: An ultra wide-angle imaging lens device 1 includes, in order from an object side: a negative first lens L1 having a meniscus shape with a convex surface directed to the object side; a negative second lens L2 having a concave surface directed to an image side and having at least one aspheric surface; a positive third lens L3 having a convex surface directed to the object side and having at least one aspheric surface; a stop; and a positive fourth lens L4 having a convex surface directed to the image side and having at least one aspheric surface. The following conditional expression (1) is satisfied: ?3.2<L/f34<3.2 ??(1) where L denotes a distance on an optical axis from an object side surface of the first lens to an image formation surface, and f34 denotes a composite focal length of the third and fourth lenses L3 and L4.

Abstract: A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens condenses laser beams transmitted through the collimator lenses in only one of a plane including the stripe width direction of the semiconductor lasers and a plane including a direction perpendicular to the stripe width direction. The second condensing lens condenses laser beams transmitted through the first condensing lens. The optical fiber is arranged in such a manner that the condensed laser beams enter the optical fiber. In the multiplexing optical system, an anamorphic lens is used as the second condensing lens, and the anamorphic lens condenses the laser beams in the two planes in cooperation with the first condensing lens.

Abstract: An objective optical system includes a diffractive optical element on the light source side of an objective lens for focusing incident light of three different wavelengths with two different numerical apertures onto three different optical recording media. The diffractive optical element is formed of two lens elements made of different materials that are cemented together at a diffractive surface. Three conditions are satisfied so as to achieve optimum imaging. The diffractive surface may be shaped so that the order of the diffracted light of the shortest wavelength ?2 having the largest diffracted intensity is different from the order of the diffracted light of the second wavelength ?2 having the largest diffracted intensity, and the order of the diffracted light of the first wavelength ?1 having the largest diffracted intensity is also different from the order of the diffracted light of the third wavelength ?3 having the largest diffracted intensity.

Abstract: A first lens group having a positive refractive power, an aperture stop, and a second lens group having a positive refractive power are provided in order from an object side. The first lens group includes, in order from the object side, a first lens that is a negative meniscus lens having a convex surface directed toward the object side, a negative second lens whose surface on an image side has a concave shape, and a positive third lens whose surface on the image side has a convex shape directed toward the image side. The second lens group includes, in order from the object side, a positive fourth lens whose surface on the image side has a convex shape directed toward the image side, a negative fifth lens having a biconcave shape, and a positive sixth lens having a biconvex shape. The fifth lens and the sixth lens are cemented together.

Abstract: A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens condenses laser beams transmitted through the collimator lenses in only one of a plane including the stripe width direction of the semiconductor lasers and a plane including a direction perpendicular to the stripe width direction. The second condensing lens condenses laser beams transmitted through the first condensing lens. The optical fiber is arranged in such a manner that the condensed laser beams enter the optical fiber. In the multiplexing optical system, an anamorphic lens is used as the second condensing lens, and the anamorphic lens condenses the laser beams in the two planes in cooperation with the first condensing lens.

Abstract: A wide angle imaging lens is provided and includes, in order from an object side, four lenses of a first lens of a negative meniscus lens having a convex surface on the object side, a negative second lens having a concave surface on an image side and constituting at least one of both surfaces by an aspherical surface, a positive third lens having a convex surface on the object side and constituting at least one of both surfaces by an aspherical surface, and a fourth lens having a convex surface on the image side and constituting at least one of both surfaces by an aspherical surface. Further, Abbe numbers of the respective first to fourth lenses with respect to d line are respectively set to be equal to or larger than 40, equal to or larger than 50, equal to or smaller than 40 and equal to or larger than 50, and an aperture diaphragm is arranged between the third lens and the fourth lens.

Abstract: A laser annealer has a laser light source with at least one GaN-type semiconductor laser and is configured so as to form emission points that emit laser beams having a wavelength of 350 to 450 nm, and a scanning device for scanning an annealing surface with the laser beams. The laser annealer may have a spatial light modulator for modulating the laser beams, and in which pixel portions whose light modulating states change in accordance with control signals are arranged on a substrate. The invention is applied to a laser thin-film forming apparatus. The apparatus has a laser source that has at least one semiconductor laser and is configured so as to form emission points, and an optical system for focusing laser beams into a single beam in the width direction of a substrate.

Abstract: A laser annealer has a laser light source with at least one GaN-type semiconductor laser and is configured so as to form emission points that emit laser beams having a wavelength of 350 to 450 nm, and a scanning device for scanning an annealing surface with the laser beams. The laser annealer may have a spatial light modulator for modulating the laser beams, and in which pixel portions whose light modulating states change in accordance with control signals are arranged on a substrate. The invention is applied to a laser thin-film forming apparatus. The apparatus has a laser source that has at least one semiconductor laser and is configured so as to form emission points, and an optical system for focusing laser beams into a single beam in the width direction of a substrate.

Abstract: A wide angle imaging lens is provided and includes, in order from an object side, four lenses of a first lens of a negative meniscus lens having a convex surface on the object side, a negative second lens having a concave surface on an image side and constituting at least one of both surfaces by an aspherical surface, a positive third lens having a convex surface on the object side and constituting at least one of both surfaces by an aspherical surface, and a fourth lens having a convex surface on the image side and constituting at least one of both surfaces by an aspherical surface. Further, Abbe numbers of the respective first to fourth lenses with respect to d line are respectively set to be equal to or larger than 40, equal to or larger than 50, equal to or smaller than 40 and equal to or larger than 50, and an aperture diaphragm is arranged between the third lens and the fourth lens.

Abstract: An optical fiber of a bundled fiber light source is an optical fiber whose core diameter is uniform but whose emission end cladding diameter is smaller than an incidence end cladding diameter thereof, and a light emission region thereof is made smaller. An angle of luminous flux from this higher luminance bundled fiber light source, which passes through a lens system and is incident on a DMD, is smaller, i.e., an illumination NA is made smaller. Thus, an angle of flux which is incident on a surface that is to be exposed is smaller. That is, a minute image formation beam can be obtained without increasing the image formation NA, focal depth is lengthen.

Abstract: In an exposure apparatus of the invention, for a spatial light modulator, each of a plurality of pixel portions fewer than the total number of the pixel portions is controlled with a control signal generated according to exposure information. Namely, a part of the pixel portions is controlled without controlling a whole of the pixel portions on the substrate. Thus, the number of pixels in the pixel portions is decreased, and transfer time of the control signal becomes short. This enables modulation speed of the laser beam to be increased and the high-speed exposure to be performed. An incorporated laser light source, in which the laser beams are incorporated and struck on the optical fiber, is preferable to the laser device. By adopting the incorporated laser light source, high brightness and high output can be obtained, and it is preferable to the exposure of the spatial light modulator. Since the fiber array is obtained with few optical fibers, it is low cost.

Abstract: A method of creating a micro-channel in a substrate surface by exposing a resist film with a laser beam, removing the exposed resist film per the predetermined pattern, and etching the substrate using the predetermined pattern to form the micro-channel.

Abstract: In an exposure apparatus of the invention, for a spatial light modulator, each of a plurality of pixel portions fewer than the total number of the pixel portions is controlled with a control signal generated according to exposure information. Namely, a part of the pixel portions is controlled without controlling a whole of the pixel portions on the substrate. Thus, the number of pixels in the pixel portions is decreased, and transfer time of the control signal becomes short. This enables modulation speed of the laser beam to be increased and the high-speed exposure to be performed. An incorporated laser light source, in which the laser beams are incorporated and struck on the optical fiber, is preferable to the laser device. By adopting the incorporated laser light source, high brightness and high output can be obtained, and it is preferable to the exposure of the spatial light modulator. Since the fiber array is obtained with few optical fibers, it is low cost.