Infrared detection curd and infrared detection curd degradation timewise distinction manner

摘要

PROBLEM TO BE SOLVED: To obtain mechanism for judging the deterioration time of an infrared detection card. ;SOLUTION: In this card, infrared to visible ray conversion phosphor 22 is used as an infrared detection part, around which an air gap 26 for visual observation of volume increase amount of the phosphor 22 is formed. Deterioration time of the card 21 is judged by the time when the infrared to visible ray conversion phosphor 22 is denatured, buried in the air gap 26 formed around the phosphor 22 and the air gap 26 is filled. The deterioration time of the infrared detection card can be simply judged by using the infrared detection card in which the air gap is formed around the infrared detection part, and judging the deterioration time by extinction of the air gap 26.;COPYRIGHT: (C)1999,JPO