Device for generating plane beam/conical shape beam and security device using generated plane beam/cone beam

A security system using a cylindrical prism, comprising:

• a plane beam generator using a hollow cylindrical prism with a predetermined diameter;
• a reflector (1230) for reflecting a plane beam generated by the plane beam generator;
• a signal detector (1240) for detecting a beam reflected from the reflector;
• a central processing unit (1260) for judging whether there is an intrusion from a signal detected by the signal detector;
• and
• an output unit (1270) for outputting the judgment result of the central processing unit.

A security system in which a plurality of security systems are respectively arranged on a plurality of planes to detect intrusions for the plurality of planes, wherein each of the plurality of security systems comprises:

• a plane beam generator using a hollow cylindrical prism with a predetermined diameter;
• a reflector (1230) for reflecting a plane beam generated by the plane beam generator;
• a signal detector (1240) for detecting a beam reflected from the reflector;
• a central processing unit (1260) for judging whether there is an intrusion from a signal detected by the signal detector;
• and
• an output unit (1270) for outputting the judgment result of the central processing unit.

A security system using a cylindrical prism, comprising:

• a plane beam generating apparatus using a hollow cylindrical prism having a predetermined diameter;
• and
• light-receiving elements for receiving a plane beam generated by the plane beam generating apparatus, the light-receiving elements are arranged in a row at one side such that they can receive the plane beam,
• wherein intersecting points of the light-receiving elements and boundary lines (1301, 1302, 1303 and 1304) generated when an intruder (1300) blocks the plane beam are obtained, equations of the boundary lines are obtained from the position of the plane beam generating apparatus and the intersecting points, and positions (P1, P2, P3 and P4) at which the intruder meets the boundary lines are determined to obtain information about the intruder.