| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element condensing light made incident obliquely to a center axis of the optical element, and also to provide an IR sensor more reliably sensing light made incident obliquely to the center axis of the optical element. SOLUTION: In the IR sensor 1 having a lens array 2 as the optical element and a sensor array 3 as a heat sensing part, a plurality of sensor parts 4 are formed. The lens array 2 has a lens body 5 and an optical element group 6 formed in the lens body 5. In the optical element group 6, optical elements 7 are vertically and horizontally arranged at a prescribed interval on one surface 5a of the lens body 5. Inclinations of optical axes a1, a2, a3 and a4 of parabolic surfaces 8 of the optical elements 7 are different from each other and the optical elements 7 are so constituted that light made incident from various angles is condensed as a whole of the optical element group 6. COPYRIGHT: (C)2010,JPO&INPIT
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