Abstract: A manufacturing method of a plastic lens formed by using a metal mold having a fixed mold and a movable mold. The plastic lens comprises a flange part surrounding a lens face, and an image side face of the flange part comprises a black coating part and an outer peripheral part. The manufacturing method may include a molding process in which the plastic lens is molded by using the fixed mold for molding an object side lens face and the movable mold for molding an image side lens face and the flange part, a mold opening process in which the metal mold is opened by moving the movable mold, and a pushing-out process in which the outer peripheral part is pushed out by an ejector pin disposed in the movable mold when the mold opening process is performed or, after the mold opening process has been performed.

Abstract: Provided is a lens unit. A second lens is provided with a flange surface section that surrounds a lens surface. An image-side flange surface has an image-side flange surface inner-circumferential section which is shaped like a ring-shaped groove, and also has a ring-shaped image-side flange surface outer-circumferential section formed to the outside of the inner-circumferential section. The image-side flange surface inner-outer circumferential section is coated with black ink. The image-side flange surface outer-circumferential section is provided with boss-shaped positioning surface at six equidistant locations along the outer circumference. Ejector pin contact sections are formed between adjacent positioning surface, and said contact sections contact the ejector pins at the time of separation from the mold during resin molding.

Abstract: A cemented lens may include a first lens and a second lens connected via an adhesive layer. The first lens may include a convex surface facing toward the second lens, and a first flange surrounding an outer circumference of the convex surface. The second lens may include a concave surface connected to the convex surface, and a second flange surrounding an outer circumference of the concave surface. One of the first and second flange may include a projection protruding toward an other of the first and second flange. The other of the first and second flange may include an opposed portion opposed to a side surface of the projection Ga is a distance between the convex surface and the concave surface, and Gb is a distance between the side surface and the opposed portion, and the following expression: Gb<Ga may be satisfied.

Abstract: A wide angle lens includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are disposed in order from an object side. The first, second, third and sixth lenses are negative meniscus lenses, and the fourth, fifth and seventh lenses are positive lenses. The fifth lens is a glass lens, and the second, third, fourth, sixth and seventh lenses are plastic lenses. The sixth lens and the seventh lens constitute a cemented lens. When a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2×f0?|R52|?5×f0.

Abstract: An in-vehicle camera lens unit having stable temperature characteristics even when lenses are mounted in a resin holder is provided. With an in-vehicle camera lens unit, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens, which are disposed in this order from an object side to an image side, are held in a resin holder. The first lens 1, the second lens, the fifth lens, and the sixth lens are glass lenses, and of the third lens and the fourth lens disposed on both sides of the diaphragm, the third lens, which is a meniscus lens, is a plastic lens, and the fourth lens, which is a double convex lens, is a glass lens.

Abstract: An optical unit is provided. In the optical unit, a holder holding part is provided with a guide part determining a first center axial line that is a reference and the tube part is provided with a guided part determining a second center axial line coincided with an optical axis of the lenses. A guided part is positioned by the guide part. A circuit board holding part is provided with a positioning part with which the circuit board is abutted and at least one of the circuit board holding part and the circuit board includes a fixed part through which the circuit board is fixed to the circuit board holding part so that a position of the circuit board to the circuit board holding part is capable of being adjusted in a direction perpendicular to the first center axial line.

Abstract: A lens unit is provided capable of reducing the shift of the focal position when the temperature rises. The lens unit includes a plurality of lenses and a cylindrical holder configured to internally hold the plurality of lenses. The holder has a smaller coefficient of thermal expansion, compared to single lenses (i.e., the second lens and the third lens) that are meniscus-shaped plastic lenses. The side surfaces of the second lens and the third lens are press-fitted such that the concave side portions corresponding to the positions of the concave lens surfaces abut the inner surface of the holder, the second lens and the third lens including the concave lens surfaces and the convex lens surfaces. Therefore, when the ambient temperature rises, the refractive index of the plastic lens decreases but the convex lens surface deforms such that the curvature radius becomes smaller.

Abstract: An imaging lens system may include a first lens; a second lens; a third lens; a diaphragm; a fourth lens; a fifth lens; a sixth lens; and a seventh lens. The first lens may be a positive meniscus lens. The second lens may be a negative meniscus lens. The third lens may be a meniscus lens comprising. The fourth lens may be a positive lens. The fifth lens may be a positive lens. The sixth lens may be a negative lens comprising a sixth lens concave surface facing the image side. The seventh lens may be a positive lens comprising a seventh lens convex surface facing the object side. The fifth lens may be a glass lens. The second, third, fourth, sixth and seventh lenses may be plastic lenses. The sixth lens concave surface may be joined to the seventh lens convex surface with an adhesive.

Abstract: A lens unit is provided capable of reducing the shift of the focal position when the temperature rises. The lens unit includes a plurality of lenses and a cylindrical holder configured to internally hold the plurality of lenses. The holder has a smaller coefficient of thermal expansion, compared to single lenses (i.e., the second lens and the third lens) that are meniscus-shaped plastic lenses. The side surfaces of the second lens and the third lens are press-fitted such that the concave side portions corresponding to the positions of the concave lens surfaces abut the inner surface of the holder, the second lens and the third lens including the concave lens surfaces and the convex lens surfaces. Therefore, when the ambient temperature rises, the refractive index of the plastic lens decreases but the convex lens surface deforms such that the curvature radius becomes smaller.

Abstract: A wide-angle lens 100 includes a first lens 10, a second lens 20, a third lens 30, a diaphragm 72, a fourth lens 40, and a fifth lens 50. The first lens 10 is a negative meniscus lens whose lens surface on an image side Lb is a concave curved surface. The second lens 20 is a negative lens whose lens surface on the image side Lb is a concave curved surface and whose lens surface on the object side La is convex curved surface. The third lens 30 is a positive lens whose lens surface on the image side Lb is a convex curved surface. The fourth lens 40 is a negative lens whose lens surface on the image side Lb is a concave curved surface. The fifth lens 50 is a biconvex lens. A refractive index n1 of the first lens 10 satisfies a conditional expression.

Abstract: A lens unit includes a plurality of lenses and a lens barrel. The lenses include at least one plastic lens which is molded by injection molding. A side face of the plastic lens is formed with a lens side press-fitted portion which is press-fitted to the lens barrel and a parting line which is formed by parting surfaces of a fixed die and a movable die of a die used in the injection molding. An inner peripheral face of the lens barrel is formed with a press-fitting holding part to which the lens side press-fitted portion is press-fitted and held, and a large diameter part whose diameter is larger in a radial direction than a diameter of the press-fitting holding part, and the large diameter part faces the parting line and is formed on an opposite side in a press-fitting direction with respect to the lens side press-fitted portion.

Abstract: A wide angle lens includes a first to a third lenses, a diaphragm, a fourth to a sixth lenses disposed in order from an object side. The fourth lens is a glass lens, and the second lens, the third lens, the fifth lens and the sixth lens are plastic lenses. The fifth lens and the sixth lens constitute a cemented lens. When a center curvature radius on an image side face of the fourth lens is “R42” and a focal length of an entire wide angle lens is “f0”, the center curvature radius “R42” and the focal length “f0” satisfy the conditional expression: 2×f0?|R42|?5×f0. When a center curvature radius on an object side face of the fourth lens is “R41”, the center curvature radii “R41” and “R42” may satisfy the conditional expression: |R41|?|R42|.

Abstract: An in-vehicle camera lens unit having stable temperature characteristics even when lenses are mounted in a resin holder is provided. With an in-vehicle camera lens unit, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens, which are disposed in this order from an object side to an image side, are held in a resin holder. The first lens 1, the second lens, the fifth lens, and the sixth lens are glass lenses, and of the third lens and the fourth lens disposed on both sides of the diaphragm, the third lens, which is a meniscus lens, is a plastic lens, and the fourth lens, which is a double convex lens, is a glass lens.

Abstract: A wide angle lens includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are disposed in order from an object side. The first, second, third and sixth lenses are negative meniscus lenses, and the fourth, fifth and seventh lenses are positive lenses. The fifth lens is a glass lens, and the second, third, fourth, sixth and seventh lenses are plastic lenses. The sixth lens and the seventh lens constitute a cemented lens. When a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2×f0?|R52|?5×f0.

Abstract: A wide angle lens includes a first to a third lenses, a diaphragm, a fourth to a sixth lenses disposed in order from an object side. The fourth lens is a glass lens, and the second lens, the third lens, the fifth lens and the sixth lens are plastic lenses. The fifth lens and the sixth lens constitute a cemented lens. When a center curvature radius on an image side face of the fourth lens is “R42” and a focal length of an entire wide angle lens is “f0”, the center curvature radius “R42” and the focal length “f0” satisfy the conditional expression: 2×f0?|R42|?5×f0. When a center curvature radius on an object side face of the fourth lens is “R41”, the center curvature radii “R41” and “R42” may satisfy the conditional expression: |R41|?|R42|.

Abstract: An optical unit is provided. In the optical unit, a holder holding part is provided with a guide part determining a first center axial line that is a reference and the tube part is provided with a guided part determining a second center axial line coincided with an optical axis of the lenses. A guided part is positioned by the guide part. A circuit board holding part is provided with a positioning part with which the circuit board is abutted and at least one of the circuit board holding part and the circuit board includes a fixed part through which the circuit board is fixed to the circuit board holding part so that a position of the circuit board to the circuit board holding part is capable of being adjusted in a direction perpendicular to the first center axial line.

Abstract: To provide a novel semiconductor device in which a reduction in channel length is controlled. The semiconductor device includes an oxide semiconductor layer having a crystal part, and a source electrode layer and a drain electrode layer which are in contact with the oxide semiconductor layer. The oxide semiconductor layer includes a channel formation region and an n-type region in contact with the source electrode layer or the drain electrode layer. The crystal orientation of the crystal part is different between the channel formation region and the n-type region.

Abstract: Variation in the electrical characteristics of transistors is minimized and reliability of the transistors is improved. A display device includes a pixel portion 104 and a driver circuit portion 106 outside the pixel portion. The pixel portion includes a pixel transistor, a first insulating layer 122 which covers the pixel transistor and includes an inorganic material, a second insulating layer 124 which is over the first insulating layer and includes an organic material, and a third insulating layer 128 which is over the second insulating layer and includes an inorganic material. The driver circuit portion includes a driving transistor for supplying a signal to the pixel transistor, and the first insulating layer covering the driving transistor. The second insulating layer is not formed in the driver circuit portion.

Abstract: An object is to suppress conducting-mode failures of a transistor that uses an oxide semiconductor film and has a short channel length. A semiconductor device includes a gate electrode 304, a gate insulating film 306 formed over the gate electrode, an oxide semiconductor film 308 over the gate insulating film, and a source electrode 310a and a drain electrode 310b formed over the oxide semiconductor film. The channel length L of the oxide semiconductor film is more than or equal to 1 ?m and less than or equal to 50 ?m. The oxide semiconductor film has a peak at a rotation angle 2? in the vicinity of 31° in X-ray diffraction measurement.

Abstract: An object is to suppress conducting-mode failures of a transistor that uses an oxide semiconductor film and has a short channel length. A semiconductor device includes a gate electrode 304, a gate insulating film 306 formed over the gate electrode, an oxide semiconductor film 308 over the gate insulating film, and a source electrode 310a and a drain electrode 310b formed over the oxide semiconductor film. The channel length L of the oxide semiconductor film is more than or equal to 1 ?m and less than or equal to 50 ?m. The oxide semiconductor film has a peak at a rotation angle 2? in the vicinity of 31° in X-ray diffraction measurement.