论文信息 - Dual numerical aperture confocal operation of moving fibre bar code reader

Dual numerical aperture confocal operation of moving fibre bar code reader

A compact bar code reader using pre-lens scanning by a piezoelectrically-actuated vibrating optical fibre cantilever is demonstrated. Dual numerical aperture confocal operation, based on transmission of a guided mode and reception of cladding modes, is shown to be a simple method for increasing and separating the return signal.

Eric M. Yeatman | Andrew S. Holmes | Richard R. A. Syms | D. A. Roberts

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