Near-infrared sensor cover
There is provided a near-infrared sensor cover to be applied to a near-infrared sensor including a transmitting unit that transmits near-infrared radiation and a receiving unit that receives near-infrared radiation reflected by an object. The near-infrared sensor cover includes a cover main body portion disposed with a thickness direction thereof to be coincide with a transmission and reception direction of the near-infrared radiation and covering the transmitting unit and the receiving unit, and a heater wire disposed on the cover main body portion to generate heat when energized. The heater wire includes plural straight line portions that extend in parallel to each other and plural connection portions that connect end portions of adjacent straight line portions. An interval between adjacent straight line portions ranges from 3 mm to 10 mm, and a diameter of the heater wire ranges from 0.01 mm to 0.2 mm.
1. A near-infrared sensor cover to be applied to a near-infrared sensor including a transmitting unit configured to transmit near-infrared radiation to outside of a vehicle and a receiving unit configured to receive near-infrared radiation reaching and reflected by an object outside the vehicle, the near-infrared sensor cover comprising:
a plate-shaped cover main body portion disposed with a thickness direction thereof to be coincide with a transmission and reception direction of the near-infrared radiation and covering the transmitting unit and the receiving unit; and
a heater wire disposed on one side of the cover main body portion in the thickness direction and configured to generate heat when energized,
wherein the heater wire includes a plurality of straight line portions that extend in parallel to each other and a plurality of connection portions that connect end portions of adjacent straight line portions, and
wherein an interval between adjacent straight line portions ranges from 3 mm to 10 mm, and a diameter of the heater wire ranges from 0.01 mm to 0.2 mm.
2. The near-infrared sensor cover according to claim 1 ,
wherein the transmitting unit is configured to transmit the near-infrared radiation by scanning a beam along a scanning path,
wherein the scanning path includes a plurality of main paths that extend in parallel with each other, and a plurality of sub-paths that connect end portions of adjacent main paths, and
wherein the straight line portions of the heater wire are disposed to extend along the main paths of the scanning path.
3. The near-infrared sensor cover according to claim 2 ,
wherein the straight line portions of the heater wire are disposed in parallel to the main paths of the scanning path.