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US 2006/0186326 A1Published application
Wave receiving apparatus and distance measuring apparatus
OwnerTakashi Itoinventor
Life of this patent
Estimating the term…
Abstract
A wave receiving apparatus includes a light receiving element and a lens for condensing a reflected light toward the light receiving element. The lens has at least three portions that are different from one another in focal length. The lens has at least three portions that are different in focal length, and can input a stable amount of light to the light receiving element in a wide range.
Claims15
A wave receiving apparatus, comprising:
- wave receiving means for receiving a wave;
- and
- a lens for condensing the wave toward the wave receiving means,
- wherein the lens has at least three portions that are different from one another in focal length.
1 more element
A distance measuring apparatus, comprising:
- wave receiving means for receiving a wave;
- a lens for condensing a wave toward the wave receiving means;
- wave emitting means for emitting the wave toward an object to be measured;
- and
- distance deriving means for deriving a distance to the object to be measured based on a traveling time of the wave from an instance of the wave emitted to the instance received back from the object,
- wherein the lens has at least three portions that are different from one another in focal length.
3 more elements
Dependencies are inferred from the claim text.