| 摘要 |
PURPOSE:To obtain a miniature and inexpensive pyroelectric temperature sensor which supplies infrared rays to a pyroelectric material intermittently and then detects them as an alternating-current output, by sliding a shield plate, which intermits infrared rays, by a reciprocating driver. CONSTITUTION:Pyroelectric material 6 with electrodes 7 and 7' formed on both sides is arranged in shield body 1 and shield plate 9 moved up-down by reciprocating driver 10 irradiates pyroelectric material 6 with infrared rays supplied through window 2 of shield body 1 by way of a light path provided at a halfway point. Supplied infrared rays strike pyroelectric material 6 intermittently through the vertical movement of shield plate 9 to generate an alternating-current pyroelectric current, which is detected by detector circuit 8 to measure the quantity of incident infrared rays. Further, an electromagnetic vibrator, bimorph electric vibrator, etc., can be used as the above-mentioned reciprocating driver to obtain a miniature and inexpensive unit. |
