| 摘要 |
<p>PURPOSE: To exactly discriminate the truth/false of forgery prevented article by deciding the truth/false of an object to be inspected based on respective reception levels outputted from an electromagnetic wave receiving means when a light source is set in turnedon and turned-off states. CONSTITUTION: When a light source 6 is set in the turned-on state by a CPU 19 as an on/off control means, electromagnetic waves are radiated from feed phones 5 and 7 to an object 1 to be inspected, the electromagnetic waves reflected, scattered or transmitted by that object to be inspected are received by an electromagnetic wave receiving means 8 and its reception level is outputted. Besides, when the light source 6 is set in the turned-off state, the electromagnetic waves reflected, scattered or transmitted from the object 1 to be inspected are similarly received by the electromagnetic wave receiving means 8, and its reception level is outputted. Then, the truth/false of the object 1 to be inspected is decided based on these reception levels when the light source 6 is set in the turned-on and turned-off states. Thus, the truth/false of forgery prevented article can be exactly discriminated.</p> |
