Optical sensor with rotary shaft-driven light intercepting member
AssigneeDenso Corporation
InventorsKatsunori Michiyama, Takeshi Tsukamoto
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Abstract
An optical sensor includes a light receiving device disposed in a housing, an exterior filter rotatably mounted to an attachment surface of the housing, and a light intercepting member which rotates along with a rotation of the exterior filter to adjust an amount of light incident on a light receiving surface of the light receiving device. In this optical sensor, the light intercepting member has a rotary shaft fixed at its center, and has a light adjusting mechanism for adjusting the amount of light incident on the light receiving surface of the light receiving device in a range in a direction of rotation around the rotary shaft. Accordingly, the sensitivity of the optical sensor can be arbitrarily adjusted with a high accuracy.
Claims18
An optical sensor comprising:
- a housing;
- a light receiving device disposed in the housing;
- an exterior filter rotatably mounted to an attachment surface of the housing;
- and
- a light intercepting member which rotates along with a rotation of the exterior filter to adjust an amount of light incident on a light receiving surface of the light receiving device,
- wherein the light intercepting member has a rotary shaft, the rotary shaft being fixed at a center portion of the light intercepting member, and has a light adjusting mechanism for adjusting the amount of light incident on the light receiving surface of the light receiving device in a range in a direction of rotation around the rotary shaft,
- wherein the center portion of the light intercepting member is biased from a center of rotation of the exterior filter,
- wherein a radius of rotation of the exterior filter is larger than a radius of rotation of the light intercepting member.
Dependencies are inferred from the claim text.