Abstract: This application relates generally to an optical fiber for the delivery of infrared light where the polarization state of the light entering the fiber is preserved upon exiting the fiber and the related methods for making thereof. The optical fiber has a wavelength between about 0.9 ?m and 15 ?m, comprises at least one infrared-transmitting glass, and has a polarization-maintaining (PM) transverse cross-sectional structure. The infrared-transmitting, polarization-maintaining (IR-PM) optical fiber has a birefringence greater than 10?5 and has applications in dual-use technologies including laser power delivery, sensing and imaging.

Abstract: A tape rewinding device for manually rewinding video cassette tapes includes a rectangular housing having an open face communicating with a hollow interior portion dimensioned to receive a video cassette tape. A pair of sprockets are mounted for rotation in the housing and are dimensioned for engagement with spool drive openings of a video cassette tape. An upwardly extending cylindrical pin in the housing is disposed for engagement with a spool lock clutch of a video cassette tape. A shallow rectangular recess formed in the back face of the housing is separated from the hollow interior by a partition wall and encloses a gear mechanism for rapidly rewinding a video tape. A manually actuated drive shaft extends through a cover plate disposed over the recess and is connected to a manual crank.