An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The device does not provide an image; only presence of light is detectable. Visible light may be used, but infrared radiation conceals the operation of the device and typically is used in modern systems. Originally, systems used lamps powered by direct current or the power line alternating current frequency, but modern photodetector systems use an infrared light-emitting diode modulated at a few kilohertz, which allows the detector to reject stray light and improves the range, sensitivity and
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| - Electric eye (en)
- Œil électronique (fr)
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| - L’œil électronique est un instrument qui rend possible l'analyse visuelle des formes et des couleurs. La palatabilité d'un produit est essentielle pour les industriels de l'agroalimentaire car elle définit le plaisir à manger, faisant intervenir de nombreux sens. Parmi ceux-là, la vue est un sens qui intervient probablement en premier dans l'envie de déguster un produit : par l'intermédiaire des couleurs, de la forme, nous pouvons avoir l'envie de manger, et ce même à distance. Ainsi, il est important d'avoir un standard visuel pour s'assurer de cette palatabilité constante auprès des consommateurs. (fr)
- An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The device does not provide an image; only presence of light is detectable. Visible light may be used, but infrared radiation conceals the operation of the device and typically is used in modern systems. Originally, systems used lamps powered by direct current or the power line alternating current frequency, but modern photodetector systems use an infrared light-emitting diode modulated at a few kilohertz, which allows the detector to reject stray light and improves the range, sensitivity and (en)
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| - An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The device does not provide an image; only presence of light is detectable. Visible light may be used, but infrared radiation conceals the operation of the device and typically is used in modern systems. Originally, systems used lamps powered by direct current or the power line alternating current frequency, but modern photodetector systems use an infrared light-emitting diode modulated at a few kilohertz, which allows the detector to reject stray light and improves the range, sensitivity and security of the device. (en)
- L’œil électronique est un instrument qui rend possible l'analyse visuelle des formes et des couleurs. La palatabilité d'un produit est essentielle pour les industriels de l'agroalimentaire car elle définit le plaisir à manger, faisant intervenir de nombreux sens. Parmi ceux-là, la vue est un sens qui intervient probablement en premier dans l'envie de déguster un produit : par l'intermédiaire des couleurs, de la forme, nous pouvons avoir l'envie de manger, et ce même à distance. Ainsi, il est important d'avoir un standard visuel pour s'assurer de cette palatabilité constante auprès des consommateurs. (fr)
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