Abstract: [Object] To provide a laser device that has a concave mirror structure and exhibits excellent optical characteristics, a laser device array, and a method of producing the laser device. [Solving Means] A laser device according to the present technology includes: a first light-reflecting layer; a second light-reflecting layer; and a stacked body. The stacked body includes an active layer, a lens being provided on a first surface on a side of the first light-reflecting layer.

Abstract: A conveyor chain having a large diameter load-carrying roller and a small diameter running roller coaxially mounted on a connecting pin which alternately connects an inner link plate with an outer link plate, a cover mounted on said link plate of a configuration to cover a gap between adjacent load-carrying rollers and a gap between adjacent running rollers preventing entrance of foreign matter. Included are chain covers covering sideways the inner and outer link plates and travelling rollers of the conveyor chain, and gap covers for preventing entrance of foreign substances which covers the gap between adjacent loading rollers and also covers the gap between adjacent travelling rollers. The gap covers have a projection portion in a position between adjacent loading rollers having a surface which is lower than an outside diameter of the loading rollers and higher than lower surfaces of the chain covers.

Abstract: An acceleration accumulating conveyor chain includes connecting pins with outer link plates disposed at opposite ends thereof, bushings clearance fitted with the connecting pins, each having a larger diameter article carrying roller and a smaller diameter running roller coaxially positioned, and inner link plates clearance fitted with the bushings at both ends thereof. The pins contact the bushings along the whole length of the bushings, whereby the bearing pressure per unit area is low. The clearance fit between the bushings and the inner link plates provides "play" permitting the running rollers to positively roll along a supporting rail. A rotation preventing mechanism can be provided at the engaging structures between the bushings and the inner link plates. By preventing rotation of the bushings relative to the inner link plates, noise caused by rotation of the bushings is eliminated.