Abstract
Two instruments have been developed, the Bi-Directional Telescope (BDT) and the Variable Offset Periscope, that will aid the alignment of large aperture, long pathlength optical systems. The BDT has been designed to view two ends of a complex long pathlength optical system along a common optical axis. The BDT provides a beam whose maximum offset between beams approaches .001" and maximum angular misalipment approaches 6.0 microradians. The other instrument, the Variable Offset Periscope, has been developed to align multiple mirror or annular optical systems to a com-mon axis, where the optical axis is obscured. The periscope is capable of offsetting a beam over most of a 23.0" diameter aperture with an angular error of less than 2.0 microradians between input and output beams.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
