Abstract: In some implementations, a laser diode array may comprise a cavity that includes a rear facet and a front facet and multiple emitters that are transversely single mode and disposed within the cavity. In some implementations, the multiple emitters each include a seeding section having a constant emitter width that is single mode at the rear facet and a flared section having a monotonically expanding emitter width that increases adiabatically over a majority of a length of the cavity such that outputs from the multiple emitters are single mode at the front facet. In some implementations, the emitter width is less than twenty micrometers at the front facet.

Abstract: method and apparatus to automatically store unique identity code of a plurality of wireless transmitters into permanent memory of a receiver control. By specifying and establishing in the receiver control the quantity of transmitters to be installed and causing each transmitter to transmit identity code along with a longer than normal preamble, new identity codes will be stored in receiver control memory. Each time a new identity code is stored one is subtracted from established quantity and when zero is reached storing is disabled.

Abstract: An Improved Intruder Detection Module is disclosed that incorporates a compact, unique optical system, a detector array, and an electronic system of a combined size and configuration that permits the Module to be shaped to approximate a normal household wall outlet box and its associated face panel. The optical system incorporates removable facet reflectors enabling the system to monitor any of a variety of different fields of view. The detector array includes pyroelectric elements mounted in an adjacent facing relationship to cause radiation passing through one element to immediately pass through the adjacent element, thereby causing intense white light to which the detector elements are not particularly responsive to generate substantially the same electrical signal in both elements. The electronic system may include a unique self-checking feature to regularly insure that the system is properly functioning, thereby avoiding nonresponse to an intruder.

Abstract: A Simplified Intruder Detector is disclosed that incorporates a compact, unique optical system and detector array, including pyroelectric elements mounted in an adjacent, facing relationship. This causes radiation passing through one element to immediately pass through the adjacent element, thereby ensuring that white light, to which the detector elements are not particularly responsive, will generate substantially the same electrical signal in both elements. The electrical system preferably includes a unique power test feature to regularly insure that the system is adequately powered, but only after an intruder has been detected, thereby avoiding nonresponse to an intruder as well as false alarms.

Abstract: The improved intruder detection system of the present invention, because of its sensor, optical, and electronic systems, is uniquely capable of responding only to radiation from an intruder to signal an alarm. To achieve this, the sensor and optical systems are designed and cooperate to optically reject and balance-out extraneous, nonintruder-related radiation. In addition, the electronic system detects and rejects nonintruder-related inputs by recognizing certain uniquely intruder-related characteristics of the sensor signals, and to only signal an alarm in response to inputs evidencing such characteristics. Preferably the system is designed to reliably sense the presence of an intruder in multiple zones, to be economical to manufacture, easy to install, to be battery-powered and of a long life.

Abstract: The improved intruder detection system of the present invention, because of its sensor, optical, and electronic systems, is uniquely capable of responding only to radiation from an intruder to signal an alarm. To achieve this, the sensor and optical systems are designed and cooperate to optically reject and balance-out extraneous, nonintruder-related radiation. In addition, the electronic system detects and rejects nonintruder-related inputs by recognizing certain uniquely intruder-related characteristics of the sensor signals, and to only signal an alarm in response to inputs evidencing such characteristics. Preferably the system is designed to reliably sense the presence of an intruder in multiple zones, to be economical to manufacture, easy to install, to be battery-powered and of a long life.