Infrared intruder-detection system
First Claim
Patent Images
1. An infrared intruder-detection system comprising:
- a first and a second optical means each of which comprises a single infrared photo diode which selectively functions either as an infrared beam projector or as an infrared beam detector and said first and second optical means selectively function such that either said infrared photo diode of said first optical means projects and said infrared photo diode of said second optical means detects an infrared beam or said infrared photo diode of said second optical means projects and said infrared photo diode of said first optical means detects an infrared beam;
a first level indicator for providing an indication having a magnitude which reflects a magnitude of an output signal of said first optical means only while the infrared photo diode of the same is functioning as an infrared beam detector; and
a second level indicator for providing an indication having a magnitude which reflects a magnitude of an output signal of said second optical means only while the infrared photo diode of the same is functioning as an infrared beam detector;
whereby said first and second optical means are individually and precisely aligned by directing said first optical means toward said second optical means while said first optical means functions to detect an infrared beam until the magnitude of the indication on said first level indicator is at a maximum, and directing said second optical means towards the first optical means while said second optical means functions to detect an infrared beam until the magnitude of the indication on said second level indicator is at a maximum.
0 Assignments
0 Petitions
Accused Products
Abstract
In a separate type infrared intruder-detection system consisting of an infrared beam projector and an infrared detector, the infrared detector is provided with a signal transmitter for transmitting an output level of the infrared detector, while the infrared beam projector is provided with a signal receiver for receiving a signal transmitted by the signal transmitter. These additionally equipped signal transmitter and signal receiver make it possible to achieve an initial beam-axis adjustment operation by one installation operator.
28 Citations
1 Claim
-
1. An infrared intruder-detection system comprising:
-
a first and a second optical means each of which comprises a single infrared photo diode which selectively functions either as an infrared beam projector or as an infrared beam detector and said first and second optical means selectively function such that either said infrared photo diode of said first optical means projects and said infrared photo diode of said second optical means detects an infrared beam or said infrared photo diode of said second optical means projects and said infrared photo diode of said first optical means detects an infrared beam; a first level indicator for providing an indication having a magnitude which reflects a magnitude of an output signal of said first optical means only while the infrared photo diode of the same is functioning as an infrared beam detector; and a second level indicator for providing an indication having a magnitude which reflects a magnitude of an output signal of said second optical means only while the infrared photo diode of the same is functioning as an infrared beam detector; whereby said first and second optical means are individually and precisely aligned by directing said first optical means toward said second optical means while said first optical means functions to detect an infrared beam until the magnitude of the indication on said first level indicator is at a maximum, and directing said second optical means towards the first optical means while said second optical means functions to detect an infrared beam until the magnitude of the indication on said second level indicator is at a maximum.
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeOptex Company Limited (OPTEX GROUP Co., Ltd.)
-
Original AssigneeOptex Company Limited (OPTEX GROUP Co., Ltd.)
-
InventorsNishimura, Shigeki, Imuro, Yoshihiro, Arimoto, Tatsuya, Sugimoto, Tadashi
-
Primary Examiner(s)MULLEN, THOMAS J
-
Application NumberUS08/034,588Time in Patent Office498 DaysField of Search340/556, 340/533, 340/539, 340/384 E, 340/691-693, 340/326, 340/328, 340/511, 340/384.1, 250/221, 455/613, 455/617, 359/152, 359/154, 359/155, 359/159US Class Current340/556CPC Class CodesG08B 13/183 by interruption of a radiat...
