CPC G01J 5/0806 (2013.01) [G01J 5/0014 (2013.01); G01J 5/0879 (2022.01); G02B 27/0966 (2013.01)] | 16 Claims |
1. A cigarette temperature detection device comprising multiple cylindrical convex lenses, wherein each of the cylindrical convex lenses has a thicker central wall between two thinner end walls formed by rotating along a parallel line at a predetermined distance around a long axis of an elliptical-like section resulting from cutting the circular convex lens by a plane perpendicular to a centerline.
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