| 摘要 |
An infrared sensor 40 for detecting infrared rays of light and a light emitting element 54 are disposed below a light transmittable top plate 4a, which has a hearing area for heating an article to be heated A placed thereon, in juxtaposed fashion relative to each other, so that infrared rays of light radiated from the article to be heated A may be guided towards the infrared sensor 40. A light guide portion 36a is provided for guiding rays of flight, emitted from the light emitting element, towards a heating area of the top plate 4a, and the rays of light emitted from the light emitting element 54 and guided by the light guide portion 36a are projected onto the top plate 4a through an upper opening 36d of the light guide portion 36a so that such rays of light can be noticed with eyes within the heating area 35. |
