Optical sensor
First Claim
1. An optical sensor comprising:
- a substrate;
a light-emitting element disposed on a surface of the substrate;
a light-receiving element disposed on the surface of the substrate and configured to detect a target object by receiving light emitted from the light-emitting element and reflected by the target object;
a lens disposed above the light-emitting element and having an optical axis, optical axis of the lens being offset from a center of the light-emitting element so that the optical axis of the light emitted from the light-emitting element and passing through the lens has an optical axis which tilts away from the optical axis of the lens in a direction moving away from the light-receiving element; and
a cover plate located above the light-emitting element, the light-receiving element and the lens such that at least some of the light emitted by the lens reflects off the cover plate; and
wherein the optical axis of the light passing through the lens has an elevation angle between 50 degrees and 89 degrees in a direction away from the light-receiving element and a beam divergence angle between 1.8 degrees and 20.3 degrees.
1 Assignment
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Accused Products
Abstract
A light-emitting element and a light-receiving element are provided on a surface of a substrate. The light-emitting element and the light-receiving element are sealed by transparent resin members and, respectively. A lens is provided at the transparent resin member at a position above the light-emitting element. The center of the lens and a mounting position of the light-emitting element are disposed being shifted from each other. With this, an optical axis of light outputted via the lens is slanted toward an opposite direction side with respect to the light-receiving element at a predetermined elevation angle. In this case, a beam divergence angle of light outputted from the lens is set to a predetermined value.
16 Citations
15 Claims
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1. An optical sensor comprising:
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a substrate; a light-emitting element disposed on a surface of the substrate; a light-receiving element disposed on the surface of the substrate and configured to detect a target object by receiving light emitted from the light-emitting element and reflected by the target object; a lens disposed above the light-emitting element and having an optical axis, optical axis of the lens being offset from a center of the light-emitting element so that the optical axis of the light emitted from the light-emitting element and passing through the lens has an optical axis which tilts away from the optical axis of the lens in a direction moving away from the light-receiving element; and a cover plate located above the light-emitting element, the light-receiving element and the lens such that at least some of the light emitted by the lens reflects off the cover plate; and wherein the optical axis of the light passing through the lens has an elevation angle between 50 degrees and 89 degrees in a direction away from the light-receiving element and a beam divergence angle between 1.8 degrees and 20.3 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical sensor comprising:
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a substrate; a light-emitting element disposed on a surface of the substrate; a light-receiving element disposed on the surface of the substrate and configured to detect a target object by receiving light emitted from the light-emitting element and reflected by the target object; a refractive-index medium disposed above the light-emitting element, the refractive index medium having a planar sloped outer surface which is located directly above the light-emitting element and through which the light emitted by the light-emitting element passes, the light passing through the sloped outer surface having an optical axis which extends away from the light-receiving element; and a cover plate located above the light-emitting element, the light-receiving element and the refractive index medium, the relative positions of the light-emitting element, the refractive index medium and the cove plate being such that at least some of the light emitted by the light-emitting element passes through the refractive-index medium and reflects off the cover plate. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification