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US 2019/0377073 A1Published application
Distance-measuring apparatus with polarizing filter
AssigneeFanuc Corporation
InventorsYuuki TAKAHASHI, Atsushi WATANABE, Minoru NAKAMURA
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Abstract
A distance-measuring apparatus includes an optical window incorporating a first polarizing filter that polarizes reference light and a second polarizing filter that polarizes incident light in a direction inclined at 90 degrees relative to a polarization direction of the first polarizing filter.
Claims12
A distance-measuring apparatus comprising:
- a light emission section that emits reference light intensity-modulated at a predefined frequency;
- a light reception section that receives incident light from a target space to be measured;
- a distance calculation section that calculates a distance to an object in the target space to be measured, based on a phase difference between the reference light and the incident light;
- and
- an optical window incorporating a first polarizing filter that polarizes the reference light and a second polarizing filter that polarizes the incident light in a direction inclined at 90 degrees relative to a polarization direction of the first polarizing filter.
2 more elements
Dependencies are inferred from the claim text.