Neutral path multimode optical fibre distance sensor with large measurement range - contains sensor scale and head with fibres of equal dia., and can use coherent or non-coherent light

摘要

The arrangement contains a sensor scale and sensor head, N/2 optical dual transmitters nd N/2 optical dual receivers, where N is an even integer. The sensor scale consists of a linear base, a sawtooth counterpiece and several cylindrical multimode fibres of equal thickness. The fibres are arranged parallel to each other on the base and on the edges of the sawtooth counterpiece at intervals of twice the fibre core dia. The head has a carrier and two groups of fibres of the same dia. as the scale fibres. USE/ADVANTAGE - E.g. for detecting translation motion. Has large measurement range, high resolution and accuracy and simple structure.