Transparent light beam detectors
AssigneeXerox Corporation
InventorsWarren B. Jackson, Mark H. Yim, Andrew A. Berlin
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Abstract
A system of partially transparent light beam detectors that allow passage of the light beam through the detector allows multiple detectors that use the same reference light beam. Transparent detectors can be position sensitive detectors (PSD), photodiode arrays, or CCD imaging arrays. The detectors are attached to vibration susceptible structural elements, with detected movement of the light beam with respect to the partially transparent light beam detectors corresponding to movement of the vibration susceptible structural element.
Claims21
A position sensitive detector comprising
- a transparent substrate,
- a plurality of layers on the substrate, with at least one of the plurality of layers generating electrical current in response to a light beam, with light transparency of the combination of transparent substrate and the plurality of layers allowing at least some of a light beam entering the position sensitive detector to exit.
A system for detecting light beam movement comprises
- a first partially transparent light beam detector allowing at least some of an entering light beam to exit, and
- a second partially transparent light beam detector positioned to intercept an exiting light beam from the first partially transparent light beam detector, with the second light beam detector being partially transparent to allow at least some of the entering light beam to exit.
A vibration detection system comprising
- a vibration susceptible structural element,
- a plurality of light beam detectors for generating signals corresponding to light beam position, the plurality of light beam detectors including at least two partially transparent light beam detectors attached to the vibration susceptible structural element, the partially transparent light beam detector positioned to allow passage therethrough of light beams, with relative detected movement of light beams with respect to the partially transparent light beam detector corresponding to movement of the vibration susceptible structural element.
Dependencies are inferred from the claim text.