Abstract: A fiber optical circulator wherein optical fibers of three ports share one glass capillary, one collimator lens and one walk-off crystal. Three optical fibers lie on a plane in a glass capillary that is aligned with a collimator lens concentrically. A light fed into the fiber of port 1, which is off optical axis of collimator lens, is collimated with an angle &thgr; to the axis of collimate lens. The collimated beam is divided into two orthogonal components by a first crystal. A device group consisting of one Faraday rotator and one pair of Half Wave Plates transfers the State Of Polarization (SOP) of two components into the same. The angled part of a combined prism bent both beams to be parallel to optical axis of system. The lights pass through a second crystal without displacement due to their SOP. Their SOP receive 90° rotations by a round trip in followed Faraday rotator with help of a reflection film on the backside or a mirror.

Abstract: An apparatus for feeding a carrier tape with successive sprocket holes and indexed pockets for carrying small components, and used in conjunction with various pick and place assembly machines for surface-mounting of the small components onto a printed circuit board or other assembly substrate. The apparatus has an interchangeable electronic feeder adaptable to various surface mount assembly machines and a set of height support adapters. The feeder has both a flip-chip and non flip-chip capabilities. The interchangeable electronic feeder further has a tape guiding assembly, an indexing assembly, an adjustable push-up tool assembly, and a flipping-converting assembly.