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APPARATUS AND METHOD FOR MEASURING AMPLITUDE OF SCANNING REFLECTOR

  • US 20190310133A1
  • Filed: 07/27/2017
  • Published: 10/10/2019
  • Est. Priority Date: 07/29/2016
  • Status: Active Grant
First Claim
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1. A device for measuring amplitude of a scanning mirror, comprising:

  • a light source for outputting an optical signal;

    a diaphragm for modifying a size and a shape of a light spot of the optical signal output by the light source;

    a scanning mirror retainer for placing a scanning mirror to be measured, the scanning mirror, after being retained, being able to periodically reflect the optical signal;

    a photoelectric sensor disposed lateral to the scanning mirror, the photoelectric sensor comprising three or more sensing elements and configured to detect and collect the optical signal reflected by the scanning mirror, wherein in a scanning cycle, when the scanning mirror is oriented in correspondence with an initial orientation, the reflected optical signal is collected by a center one of the three or more sensing elements, otherwise the reflected optical signal is collected by other ones of the three or more sensing elements; and

    a signal acquisition and processing unit for processing a signal collected by the photoelectric sensor to derive an amplitude of the scanning mirror.

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