초록 ▼

A consolidated laser alignment and test station. In exemplary embodiments, equipment sufficient to perform complete dynamic testing and alignment of a laser transceiver unit is provided in one compact arrangement. As a result, cavity-box efficiency testing, dynamic open-interferometer alignment, dyn

A consolidated laser alignment and test station. In exemplary embodiments, equipment sufficient to perform complete dynamic testing and alignment of a laser transceiver unit is provided in one compact arrangement. As a result, cavity-box efficiency testing, dynamic open-interferometer alignment, dynamic open-case alignment, closed-case laser boresighting, and complete laser functionality and diagnostic testing can be carried out efficiently at a single location. Real-time diagnostic feedback relating to beam quality, radiometry, and temporal behavior is provided so that high-precision laser alignments and repairs can be made quickly and cost effectively. Customized test fixtures provide easy access to every level of the transceiver unit under test, and two cameras provide far-field, near-field, wide-field and receiver-field beam viewing. One camera is combined with a pin-hole lens and a quad step-filter optic attenuator to provide a wide-field beamfinder assembly enabling an operator to quickly align the laser under test to the narrower field of the second (diagnostic) camera. The second camera provides near-field and far-field beam viewing, while a radiometer and a pulse detector provide additional diagnostic information. The beamfinder assembly also provides receiver-field laser viewing for receiver-path boresight adjustments. In an exemplary embodiment, the beamfinder assembly includes a quad step-filter constructed from circular wedge filters.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for making a step-wise variable optic attenuator, comprising the steps of:a) cutting a first wedged filter in half to create a first filter piece and a second filter piece;b) rotating the second filter piece 180 degrees relative to the first filter piece;c) bon

[ What is claimed is:] [1.]1. A method for making a step-wise variable optic attenuator, comprising the steps of:a) cutting a first wedged filter in half to create a first filter piece and a second filter piece;b) rotating the second filter piece 180 degrees relative to the first filter piece;c) bonding the rotated second filter piece to the first filter piece to provide a first half-filter having a first level of optic attenuation, wherein wedge effects caused by the first filter piece are largely canceled by wedge effects caused by the second filter piece so that the first half-filter has substantially no wedge effect;d) repeating said steps of cutting, rotating and bonding using a second wedged filter to provide a second half-filter having a second level of optic attenuation and substantially no wedge effect; ande) bonding the first half-filter and the second half-filter to provide a step-wise variable optic attenuator having first and second levels of optic attenuation and substantially no wedge effect.