Design of a Steerable Two-beam System for Simultaneous On- and Off-axis Imaging with GUFI

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Charge-Coupled Devices, Image Detectors, And Ir Detector Arrays, Photometric, Polarimetric, And Spectroscopic Instrumentation, Image Processing, Ground-Based Ultraviolet, Optical And Infrared Telescopes

Scientific paper

The GUFI (Galway Ultra Fast Imager) has been primarily developed for high throughput differential photometry, in order to study variability in challenging circumstances, such as near bright sources or within crowded fields. The instrument features a low light level charged coupled device (L3-CCD) that enhances detector speed and sensitivity but only covers small fields of view. This presents limitations on possible science targets when suitable differential photometry comparison stars are not in the immediate vicinity of the target. Conventional solutions for imaging larger portions of sky without sacrificing SNR include telescope focal reduction methods and large arrays of CCDs. Our alternative solution entails a two-path, `outrigger' optical design to image target and comparison stars separately. This new approach allows detection of variable targets that formerly were not reachable with smaller-field detectors. The mechanical design was originally generated with AutoCAD® drafting software before being compiled in, and vetted with an OSLO® optical design package. Through filters B, V and I, the limiting design aberration was chromatic focal shift that appeared most severe in the B-filter's bandpass range. However, the degree of image blurring caused by this aberration and others did not exceed the scale of that already produced by atmospheric turbulence. For each bandpass, the model's imaging performance met and exceeded expectations set by all design constraints.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Design of a Steerable Two-beam System for Simultaneous On- and Off-axis Imaging with GUFI does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Design of a Steerable Two-beam System for Simultaneous On- and Off-axis Imaging with GUFI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Design of a Steerable Two-beam System for Simultaneous On- and Off-axis Imaging with GUFI will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1873267

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.