Abstract: A light source includes a substrate on which an excitation light source is mounted, a lens including a light transmitting portion that transmits light from the excitation light source and a body attached to the substrate, a first thermal expansion absorber that protrudes from the body and has high heat resistance and elasticity, and a cover fixed to the substrate in a state where the body of the lens is sandwiched between the cover and the substrate via the first thermal expansion absorber.

Abstract: A light source includes a substrate on which an excitation light source is mounted, a lens including a light transmitting portion that transmits light from the excitation light source and a body attached to the substrate, a first thermal expansion absorber that protrudes from the body and has high heat resistance and elasticity, and a cover fixed to the substrate in a state where the body of the lens is sandwiched between the cover and the substrate via the first thermal expansion absorber.

Abstract: A sub-nozzle in an air injection type weaving machine in which fluffing or the like caused by contact thereof with warp etc. does not occur, and for which its manufacture and control is facilitated. A sub-nozzle jetting a high-speed air flow for acceleration toward weft thrown from a main nozzle to between warps when they are raised and lowered to form shed opening comprises a holder connected to the side of a supply source of compressed air and a nozzle head connected to the holder, where at least the nozzle head is integrally formed by a high-strength glass material and occurrence of warp damage or wear of the nozzle head per se is restrained by the smoothness of its surface.