Abstract: A method and device capable of properly selecting light radiating conditions in soldering work where components are soldered onto a board with light radiation applied to a solder joint. The device for selecting the light radiation conditions may contain a) an input device for entering information on; b) a storage for storing at least any one of databases on light radiation power and light radiation time for soldering; c) a calculator for determining light radiating conditions according to the information entered through the input device and the database stored in the storage; and d) an output device for outputting the light radiating conditions determined by the calculator. The input device may further comprise i) a component; ii) a board on which the component is soldered; and iii) solder for soldering the component.

Abstract: A fiber-bundle disclosed has: a bundle of a plurality of optical fibers each receives a light beam in one end and emits the light beam from the other end; and an adjuster to adjust positions of a plurality of optical fibers. The configuration can realize a wide variety of irradiation patterns easily and freely.

Abstract: A fiber-bundle disclosed has: a bundle of a plurality of optical fibers each receives a light beam in one end and emits the light beam from the other end; and an adjuster to adjust positions of a plurality of optical fibers. The configuration can realize a wide variety of irradiation patterns easily and freely.

Abstract: The light radiating conditions selecting device contains a) an input device for entering at least any one item of information on i) a component; ii) a board on which the component is soldered; and iii) solder for soldering the component; b) a storage for storing at least any one of databases on light radiation power and light radiation time for soldering; c) a calculator for determining light radiating conditions according to the information entered through the input device and the database stored in the storage; d) and an output device for outputting the light radiating conditions determined by the calculator.

Abstract: A light beam heating apparatus having a condensing lens mechanism including an aspherical lens and a spherical lens disposed in a light path. The light beam heating apparatus also includes a light source and a light path which transmits the light beam irradiated from the light source, to an object to be heated. The light beam is transmitted through an optical fiber along part the light path, and the aspherical lens and spherical lens are disposed on the optical fiber side and on the object-to-be-heated side respectively. The above-described construction functions to suppress lateral aberration when the diameter of an optical fiber in use is changed, thereby preventing deterioration of the imaging capacity. Also, the occurrence of chromatic aberration can be suppressed to a minimum. Thus, energy concentration in the light condensing section can be improved.

Abstract: A movement detector of the feeder of wire solder directly touches the wire solder, and the movement detector includes (a) a rotating body which revolves when the wire solder moves along a feeding direction and (b) a rotation detector which produces a rotation detecting signal by detecting a rotation of the rotating body. An abnormal halt detector of the feeder of the wire solder compares a rotation detecting signal from a rotation detector with a rotation instructing signal sent to a motor which feeds the wire solder, and calculates the comparison result, thereby judges an abnormal halt of the wire solder. When the abnormal halt is detected, a feeding roller for the wire solder is stopped, whereby the wire solder is prevented from being bent and deformed.