| 摘要 |
An optical input and/or control de and/or actuating variable functions of, for examp device, the optical input and/or control device ha radiation from a diode laser ( 3 ) is converged. As across the window ( 12 ), part of the scattered radi due to the movement of the finger ( 15 ), re-enters measured using the self-mixing effect of the lase radiation emitted by the laser ( 3 ) and re-entering of the laser and thus in the radiation emitted by photo-diode ( 4 ) which converts the radiation vari circuitry is provided which processes this signal. ice for manually selectively controlling e, an image capture device or a computer mg a transparent window ( 12 ) on which an object, e.g. a user's finger ( 15 ), moves tion, whose frequency is Doppler-shifted the laser cavity. Relative movement is diode ( 3 ), which is the phenomenon that e laser cavity induces a variation in gain e laser ( 3 ). The change can be detected by a tion into an electric signal and electronic
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