Patent ID: 8421003

Claim:
An optical transceiver, comprising: a platform; a transmitter including a source and transmitter optics on the platform that emits an optical beam collimated to one-quarter wave or less that diverges in a transmitter field-of-view (FOV); a receiver including a detector and receiver optics on the platform that detects optical radiation in a receiver FOV; a light pipe on the platform, said light pipe comprising, an input face and first reflective surface in the transmitter FOV to intercept a portion of the beam along a first axis and re-direct the beam; a second reflective surface and output face in the receiver FOV that re-directs the portion of the beam along a second axis towards the receiver to create a virtual object in the receiver FOV; and an optical channel that guides the redirected portion of the beam from the first reflective surface to the second reflective surface to offset the second axis from the first axis; and a processor that processes a signal generated by the receiver in response to the virtual object to perform one or more built-in tests (BIT) on the transceiver.