Lissajous curves in a laser barcode reader
photo by cesarastudillo on Flickr
License
Size and Profile
- Uploaded:
- Jan 20, 2010
- Original:
- 1280 × 851
- Original date:
- Nov 11, 2006
In order to be able to read a barcode regardless of orientation, laser barcode readers have rotating mirrors that deflect the laser beam in varying patterns. Here you can see the Lissajous curves created by two mirrors rotating along perpendicular axes (at least, this is my hypothesis). The photo is taken at a Leroy Merlin store in Las Rozas, Madrid, Spain.
Wikipedia Article
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A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones. Additionally, nearly all barcode readers contain decoder circuitry analyzing the barcode's image data provided by the sensor and sending the barcode's content to the scanner's output port.
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In mathematics, a Lissajous curve ( /ˈlɪsəʒuː/ and /ˈbaʊdɪtʃ/), also known as Lissajous figure or Bowditch curve, is the graph of a system of parametric equations
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| Barcode reader |
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