Weighing device
AssigneeSeiko Epson Corporation
InventorKoji CHINDO
Life of this patent
Estimating the term…
Abstract
A weighing device includes: a support having a placement surface on which an object to be measured is to be placed, the placement surface being displaced according to a mass of the object to be measured; a mirror disposed on the support; a laser interferometer configured to detect, using a laser beam, a change in optical path length to the mirror due to the displacement of the placement surface; and a controller configured to calculate a weight or a mass of the object to be measured based on the detected change in optical path length, in which the laser interferometer includes a laser light source configured to emit the laser beam, and a optical modulator including a vibrator and configured to modulate a frequency of the laser beam using a vibration of the vibrator.
Claims13
A weighing device comprising:
- a support having a placement surface on which an object to be measured is to be placed, the placement surface being displaced according to a mass of the object to be measured;
- a mirror disposed on the support;
- a laser interferometer configured to detect, using a laser beam, a change in optical path length to the mirror due to the displacement of the placement surface;
- and
- a controller configured to calculate a weight or a mass of the object to be measured based on the detected change in optical path length, wherein
- the laser interferometer includes a laser light source configured to emit the laser beam, and an optical modulator including a vibrator and configured to modulate a frequency of the laser beam using a vibration of the vibrator.
Dependencies are inferred from the claim text.