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Optical switch offers an 890nm wavelength IR LED

Posted: 13 May 2010     Print Version  Bookmark and Share

Keywords:optical switch  phototransistor  sensor 

OPB920 optical switches

TT electronics Optek Technology develops the OPB920xZ series that consists of non-contact switches with an IR LED mounted on the tower and a Photologic sensor mounted on the base of a right angle-shaped package.

The Photologic slotted optical switch in a right angle package provides design engineers a flexible optical device with multiple output configurations.

"The OPB920 series switches provide maximum flexibility, as the design engineer can specify the type of TTL output configuration," said Roland Chapa, VP of optoelectronic integrated solutions for TT electronics Optek Technology. "Additionally, the right angle package configuration allows for an opaque object to block the light beam from multiple directions, including the X, Y and Z axes."

The OPB920 series optical switches are suited for use in non-contact interruptive object sensing, tray-out and low paper tray sensing, paper sorting equipment, amusement/gaming equipment, corner and door sensing, printers and copy machine applications.

On addition, the OPB920 series switch features an 890nm wavelength IR LED with a power dissipation of 100mW. Maximum forward current is 40mA and maximum forward voltage is 1.7V (If=20mA). Reverse DC voltage is 2V, with reverse current of 100mA (Vr=2V). The output Photologic sensor features a supply voltage (Vcc) of 18V and power dissipation of 200mW. Operating temperature for the optical switches ranges from -40°C to +70°C. Custom electrical, wire and cabling, and connectors are also available.

Output configurations for the OPB920 series switches include TTL totem pole and TTL open collector, both of which can be buffered or inverted. All versions of the switch include hysteresis built into the circuitry. The optical centre line between the emitter and photosensor is at 45° from the mounting base of the device.

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