Abstract: Provided is a wavelength converter including a phosphor ceramic containing a first phosphor that emits fluorescence due to a parity-forbidden transition, and a phosphor part containing a second phosphor that emits fluorescence due to a parity-allowed transition. A main surface of the phosphor ceramic has a concave and convex structure including a plurality of convex parts and a plurality of concave parts. The phosphor part is arranged inside the plurality of concave parts in the phosphor ceramic. Also provided is a light emitting device including the wavelength converter, and a solid-state light source that emits light with which the wavelength converter is irradiated and which has a light emission peak within a wavelength range of 400 nm or more and less than 500 nm.

Abstract: A method for machining a work in a work machining apparatus provided with a movable main spindle moving between a work supply position and a work take-out position, includes arranging a tool rest on the movable main spindle to move integrally with the movable main spindle, supplying the work at the work supply position to the movable main spindle, moving the movable main spindle from the work supply position toward the work take-out position, machining the work held on the movable spindle with a tool of the tool rest while moving the movable main spindle from the work supply position toward the work take-out position, and taking out the work at the work take-out position from the movable main spindle.

Abstract: A work machining apparatus capable of reducing the stand-by time in each main spindle as much as possible and can improve the operation ratio is provided. In a work machining apparatus having at least one movable spindle 22 which moves forward and backward between the work supply position and the work take-out position, in which a work is supplied to movable main spindle 22 at the supply position, the movable main spindle 22 is moved from the supply position to the take-out position and the work is taken out from the movable main spindle 22 at the supply position, whereby the work is conveyed from the supply position to the take-out position, wherein a tool rest 6 corresponding to the movable main spindle 22 is provided integrally with the movable main spindle 22 and movably on the movable spindle 22, thereby enabling the tool on the tool rest 6 to process the work held on the movable main spindle 22 during the conveyance movement of the work by the movable main spindle 22.