Abstract: Wavelength selection apparatus for use in various applications such as spectrometry, the demultiplexing/multiplexing of multiline laser beams, and so forth, includes an input prism and an output prism aligned along an optical axis, and at least one side mirror. A second side mirror spaced from the first side mirror on the opposite side of the optical axis may be provided, as well as end mirrors adjacent to the input and output prisms. An incoming beam incident upon the input prism is refracted so as to deflect and angularly disperse the various wavelengths present in the input beam, with the dispersing beam reflected from the first side mirror either directly to the output prism or with intermediate reflections from the second side mirror and the end mirrors before impinging upon the output prism. The output prism matches the input prism and deflects and recollimates the dispersed wavelengths to provide parallel output beams of different wavelengths spaced from one another.

Abstract: A bicycling shoe has a ferromagnetic backing plate positionably connected to its sole. A nonmagnetic support plate has a plurality of through holes, and is fixed to the backing plate. NdFeB magnets of alternating polarity are attached by epoxy to the sidewalls of the through holes and make magnetic contact with the backing plate. A similar backing plate, support plate and alternating polarity magnet assembly is fixed to a bicycle pedal. A post extends from the pedal to position the shoe laterally. When the shoe is in a pedaling position, the polarity of the pedal magnets is opposite to the polarity of the shoe magnets, and the shoe is gripped to the pedal to permit transmission of power on the up stroke. To disengage, the shoe is rotated about the post, until like magnets are brought into opposition and the shoe is ejected from its position on the pedal.

Abstract: The objective lens in a confocal tandem scanning reflected light microscope is movable relative to the specimen stage by piezoelectric actuators controlled by a closed-loop feedback control system having eddy current sensors to detect lens position. Position control input is either manual or automatic.