Electromagnetic wave sensor cover

An electromagnetic wave sensor cover configured to be employed in an electromagnetic wave sensor including a transmitting portion that transmits an electromagnetic wave and a receiving portion that receives the electromagnetic wave, the electromagnetic wave sensor cover comprising a cover body configured to cover the transmitting portion and the receiving portion from a front in a transmission direction of the electromagnetic wave from the transmitting portion, wherein:

• the cover body includes:
• a base layer made of synthetic resin and permitting passage of the electromagnetic wave;
• one or more metal oxide layers permitting passage of the electromagnetic wave and being conductive;
• one or more low refractive index layers permitting passage of the electromagnetic wave and made of material that has a lower refractive index than material of the metal oxide layer;
• and
• two electrodes disposed in contact with the metal oxide layer to energize the metal oxide layer so that the metal oxide layer generates heat,
• the base layer includes a front surface and a rear surface in the transmission direction,
• the metal oxide layer and the low refractive index layer are laminated adjacent to each other in the transmission direction,
• a laminate of the metal oxide layer and the low refractive index layer is laminated on the front surface or the rear surface of the base layer, and
• the low refractive index layer is made of silicon dioxide.

An electromagnetic wave sensor cover, configured to be employed in an electromagnetic wave sensor including a transmitting portion that transmits an electromagnetic wave and a receiving portion that receives the electromagnetic wave, the electromagnetic wave sensor cover comprising a cover body configured to cover the transmitting portion and the receiving portion from a front in a transmission direction of the electromagnetic wave from the transmitting portion, wherein:

• the cover body includes:
• a base layer made of synthetic resin and permitting passage of the electromagnetic wave;
• one or more metal oxide layers permitting passage of the electromagnetic wave and being conductive;
• one or more low refractive index layers permitting passage of the electromagnetic wave and made of material that has a lower refractive index than material of the metal oxide layer;
• and
• two electrodes disposed in contact with the metal oxide layer to energize the metal oxide layer so that the metal oxide layer generates heat,
• the base layer includes a front surface and a rear surface in the transmission direction,
• the metal oxide layer and the low refractive index layer are laminated adjacent to each other in the transmission direction,
• a laminate of the metal oxide layer and the low refractive index layer is laminated on the front surface or the rear surface of the base layer,
• wherein the one or more metal oxide layers are metal oxide layers,
• the one or more low refractive index layers are low refractive index layers, and the metal oxide layers and the low refractive index layers are alternately laminated.