Abstract: A light emitting end face side front end part of an optical fiber bundle 16 is covered by a sleeve member 13 and an emitting part outer cover 14. A glass rod holding member 42, which holds a glass rod 40, is mounted to emitting part outer cover 14. Glass rod 40 is fixed to glass rod holding member 42 by means of positioning pins 44 and a light incidence end face 40i thereof opposes a light emitting end face 16o of optical fiber bundle 16. A light emitting end face 40o of glass rod 40 has a rectangular shape. The light emitting from light emitting end face 40o is made uniform in illuminance across the entirety of its cross section and the cross section thereof is shaped to a rectangular shape in the process of being propagated while being totally reflected at the boundary surface of glass rod 40.

Abstract: A light emitting end face side front end part of an optical fiber bundle 16 is covered by a sleeve member 13 and an emitting part outer cover 14. A glass rod holding member 42, which holds a glass rod 40, is mounted to emitting part outer cover 14. Glass rod 40 is fixed to glass rod holding member 42 by means of positioning pins 44 and a light incidence end face 40i thereof opposes a light emitting end face 16o of optical fiber bundle 16. A light emitting end face 40o of glass rod 40 has a rectangular shape. The light emitting from light emitting end face 40o is made uniform in illuminance across the entirety of its cross section and the cross section thereof is shaped to a rectangular shape in the process of being propagated while being totally reflected at the boundary surface of glass rod 40.

Abstract: Determined is a correlation value R (=I(t)/I(0)) between an intensity I(0) of monitor light at least at one specific wavelength which is detected before cure of resin RSN and I(t) of the monitor light at the specific wavelength which is thereafter detected, and the cure of the resin RSN is judged to be completed when a temporal change of the correlation value R comes to a stable state. In assembly manufacturing, light-cure resin RSN is interposed between at least two members M1 and M2. After the above described cure end point is detected, application of resin curing light to the resin RSN is stopped, and the assembly is transferred.

Abstract: The present invention comprises a discharge lamp (2) for emitting light; a cold mirror (4), having an opening portion, for reflecting the light emitted from the discharge lamp; a reflecting mirror (10), located on the opening portion side of the cold mirror, for reflecting the light reflected by the cold mirror; a light-shielding drum (6) having a light emission port (8) for emitting the light reflected by the reflecting mirror; a stepping motor 14 for driving the reflecting mirror and the light-shielding drum to rotate about an optical axis of the discharge lamp; rotational angle detecting means (18, 20) for detecting a rotational angle of the reflecting mirror and the light-shielding drum; and control means (40, 46) for controlling, according to the rotational angle detected by the rotational angle detecting means, the rotational driving of the reflecting mirror and the light-shielding drum (6) caused by the stepping motor 14; wherein any of a plurality of irradiation ports is selectively irradiated through