Kyocera Corporation

Daihen Corporation

Daisuke Kanai

Takaharu Fujii

Takashi Saotome

Nobuhiro Tani

Hirokazu Saito

Kengo Onishi

Tomohiro Noguchi

Satoru Kihara

Kousuke Sugiki

An imaging lens unit includes a resin lens barrel and a plurality of lenses incorporated in the lens barrel. The lens barrel has a lens barrel body and a box-shaped part. A plurality of lens receiving parts are arranged at predetermined intervals in a circumferential direction of the lens barrel body and protrude from an inner peripheral surface of the lens barrel body. The fourth lens is fixed to the lens barrel in a state of being engaged with the plurality of lens receiving parts.

Imaging lens unit and manufacturing method thereof

An imaging lens includes a front group having negative power, an aperture stop, and a rear group having positive power, in order from an object side. In the front group, a first lens surface has a convex shape toward the object side. In the rear group, a second lens surface has a convex shape toward the object side, a third lens surface has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat. A curvature radius of the second lens surface is represented by Rr, a curvature radius of the third lens surface is represented by Re, a distance from the second lens surface to the third lens surface on an optical axis is represented by Da, and the following condition is satisfied: 1.6<(Rr+|Re|)/Da<2.3.

Imaging lens and imaging apparatus

An imaging lens may be a retrofocus type imaging optical system including, in order from an object side, a first lens group, an aperture and a second lens group. The first lens group may include, from the object side, a meniscus as a first lens in which a convex surface is formed on the object side, and a meniscus lens as a second lens in which a convex surface is formed on the object side. The second lens group may include a convex lens as a third lens, a biconvex lens as a fourth lens, a biconvex lens as a fifth lens and a sixth lens, and the fifth lens and the sixth lens may be joined to each other. The imaging lens may be constructed with 6 elements and 5 groups including the first lens group and the second lens group.

Imaging lens and camera device equipped with imaging lens

The durability and detection accuracy of a sensor unit may possibly decrease due to radiation heat generated from work pieces while they are welded together. A sensor deviceincludes a sensor unit, a housing case, and a shielding member. The sensor unitis a device for measuring the shapes of the work pieces W or the distance to the work pieces W. The housing casehouses the sensor unitand has formed therein a pass-through portionfor laser beam projection and a pass-through portionfor detection that pass a laser beam Lfrom a laser beam projection unitand a laser beam Ldirected to a detection unit, respectively. The shielding memberis attached to the housing case, and shields radiation heat directed toward the lower surface of the housing caseamong radiation heat generated while the work pieces W are welded together. The shielding memberis made of a material with lower thermal conductivity than that of the housing case

Sensor device for welding

A gas, which flows between a welding device and work pieces while the work pieces are welded together, has large influence on the welding. A sensor device includes a sensor unit and a container that includes a housing case (i.e., housing portion) and a shielding member (i.e., shielding portion). The shielding member is attached to the housing case, and shields radiation heat directed toward the lower surface of the housing case among radiation heat generated while the work pieces W are welded together. The shielding member is inclined with respect to a flow direction of a gas passing through an outlet port for detection of a second gas flow channel so that the gas discharged from the outlet port for detection is blown to the shielding member and thus flows to a side opposite to the side where the work pieces W are to be welded together.

A sensor device includes a sensor to detect a light beam to measure states of work pieces or a distance to the work pieces, a case body housing the sensor, and a protective cover including a protective plate that transmits the detection light beam. The protective cover includes a gas flow channel that passes a gas to be blown to the protective plate, the gas flow channel having formed therein an outlet port that passes the detection light beam and discharges the gas having flowed through the gas flow channel. The gas flow channel includes an accumulator between the protective cover and the case body adapted to have accumulated therein the gas flowing through the gas flow channel, and the accumulator includes vent holes through which the gas is allowed to flow out toward the outlet port.

Growing community of inventors

Ome, Japan

Daisuke Kanai