Patent ID: 11947292
Assignee: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A heater comprising:
a substrate comprising metal and having a shape extending in one direction;
a first insulating part provided on a first surface of the substrate and having an insulating property;
only one heating element provided on the first insulating part and extending along a longitudinal direction of the substrate, wherein the only one heating element provided on the first insulating part is one continuous piece;
a first protection part provided on the first insulating part, extending along the longitudinal direction of the substrate and covering the only one heating element provided on the first insulating part;
a second insulating part provided on a second surface of the substrate opposite the first surface and having an insulating property;
only one heating element provided on the second insulating part and extending along the longitudinal direction of the substrate, wherein the only one heating element provided on the second insulating part is one continuous piece; and
a second protection part provided on the second insulating part, extending along the longitudinal direction of the substrate and covering the only one heating element provided on the second insulating part;
wherein a length of the only one heating element provided on the second insulating part is different from a length of the only one heating element provided on the first insulating part in the longitudinal direction of the substrate.