摘要:
A tuning-fork type crystal resonator plate includes a base portion and a pair of leg portions protruding from the base portion in one direction. A groove and a bank portion are formed on at least one of main surfaces of each of the leg portions. The bank portion is formed accompanied by the formation of the groove, and a width of the bank portion differs along a width direction. The bank portion is constituted by a thick portion having a large width and a thin portion having a small width.
摘要:
A reflector used in an electronic flash device that collectively emits direct light emitted from a light source and reflected light that has been reflected by a reflective surface onto a subject, and an electronic flash device that uses such reflector. The reflector includes a pair of first reflective surfaces that are composed of portions of a cylindrical curved surface and face one another, and a second reflective surface that is contiguous with the pair of first reflective surfaces and inside which a xenon lamp is housed. Contiguous portions where the pair of first reflective surfaces and the second reflective surface are contiguous are set closer to the opening of the pair of first reflective surfaces than a center of the xenon lamp. With this construction, by it is possible to maintain a predetermined optical performance while making the electronic flash device smaller and slimmer.
摘要:
A reflector used in an electronic flash device that collectively emits direct light emitted from a light source and reflected light that has been reflected by a reflective surface onto a subject, and an electronic flash device that uses such reflector. The reflector for an electronic flash device includes a pair of first reflective surfaces 24, 25 that are composed of portions of a cylindrical curved surface and face one another and a second reflective surface 26 that is contiguous with the pair of first reflective surfaces 24, 25 and inside which a xenon lamp 12 is housed. Contiguous portions B1, B2 where the pair of first reflective surfaces 24, 25 and the second reflective surface 26 are contiguous are set closer to the opening 13a of the pair of first reflective surfaces 24, 25 than a center O of the xenon lamp 12 that is the light source. With this construction, by emitting all or the majority of the reflected light to the front from the opening, it is possible to maintain a predetermined optical performance while making the electronic flash device smaller and slimmer.