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Infrared Switches

Excelitas' optoswitches are ideal for non-contact sensing applications. They consist in an emitter and a detector integrated in a plastic housing. The emitter is an IR LED while the detector is either a phototransistor or a photodarlington. These optoswitches are available either in transmissive or reflective configuration.

In its most basic form, a reflective optical switch (retro) consists of a housing which holds both a light source and a detector. Light from the lamp of LED radiates outward and is reflected back should an object be placed in front of the switch. The reflected light is sensed by the photodetector whose output signal changes accordingly.

When the object to be sensed has a polished surface, such as aluminum foil or Mylar tape, often the best type of reflective switch to use is one which is designed to take advantage of the large amount of directly reflected light. This is done by mounting the emitter and detector such that their optical centers lie along the legs of an isosceles triangle such that the angle of the incidence of the emitter is equal to the angle of reflection.

When trying to sense matte objects (which do not have a highly polished surface, such as white paper), it is often possible to use a type of reflective switch optimized for sensing diffuse reflected light. Such devices have the emitter and detector mounted parallel to each other within the switch housing.

Product List
  
  
  
VTL11D7HTransmissive Optoswitch - 0.395'' high (0.020'' wide detector aperture)Datasheet
VTL11D6-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.005'' wide detector aperture)Datasheet
VTL11D5-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.010'' wide detector aperture)Datasheet
VTL11D7-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.020'' wide detector aperture)Datasheet
VTL11D1-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture)Datasheet
VTL11D3-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture)Datasheet
VTL11D1HTransmissive Optoswitch - 0.395'' high (no apertures)Datasheet
VTL11D3HTransmissive Optoswitch - 0.395'' high (no apertures)Datasheet
VTL13D7HTransmissive Optoswitch - 0.395'' high (0.020'' wide detector aperture)Datasheet
VTL13D6-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.005'' wide detector aperture)Datasheet
VTL13D5-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.010'' wide detector aperture)Datasheet
VTL13D7-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture - 0.020'' wide detector aperture)Datasheet
VTL13D1-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture)Datasheet
VTL13D3-20HTransmissive Optoswitch - 0.395'' high (0.020'' wide emitter aperture)Datasheet
VTL13D1HTransmissive Optoswitch - 0.395'' high (no apertures)Datasheet
VTL13D3HTransmissive Optoswitch - 0.395'' high (no apertures)Datasheet
VTL23D0A21HTransmissive Optoswitch - 0.425'' high (0.020'' wide emitter aperture - 0.010'' wide detector aperture)Datasheet
VTL23D0A22HTransmissive Optoswitch - 0.425'' high (0.020'' wide emitter aperture)Datasheet
VTL23D1A22HTransmissive Optoswitch - 0.425'' high (0.020'' wide emitter aperture)Datasheet
VTL23D1A00HTransmissive Optoswitch - 0.425'' high (0.040'' wide emitter aperture)Datasheet
VTL23D2A00HTransmissive Optoswitch - 0.425'' high (0.040'' wide emitter aperture)Datasheet
VTL23D3A00HTransmissive Optoswitch - 0.425'' high (0.040'' wide emitter aperture)Datasheet
VTR16D1HReflective Optoswitch - Arrow Retro with PCB Mount LeadsDatasheet
VTR17D1HReflective Optoswithc - Arrow Retro with Flying LeadsDatasheet
VTR24F1HReflective Optoswitch - Long RangeDatasheet