Patent ID: 6329647
Filing Date: 2001-12-11
Classification: G01D,G01J,G05G

Abstract:
An electronic compensation reference circuit for fiber optic electromechanical control device for providing a regulated light source and for processing the reflected light from joystick mirrors to compensate for changes due to temperature, aging and reflectivity of mirrors and fiber optic path comprising:a) means for generating a regulated light source;b) means for directing and dividing said regulated light source into two light components as a function of the joystick position along an axis;c) means for directing said two light components one each onto two photo diodes;d) means for converting said two light components into proportional electrical signals;e) means for amplifying said two electrical signals;f) means for reamplifying the difference between said two amplified electrical signals for use as joystick position along an axis; alsog) means for comparing the smaller of said two amplified electrical signals to a reference signal; andh) means for utilizing the output of said comparison to regulate said regulated light source.