The relationship between the aspect ratio and tip-tilt parameters. A third order 2D-polynomial is used to fit the surface.
Automated Alignment of Optical System
A schematic shows how our automated alignment system works:
(click to see better image)
The image in our simulation shows a deformed ellipse. We use Gaussian ellipse fitting method to extract useful information from the image, then use them in our feedback control system.
A video shows the misalignment calibration in experiment (correcting the shift of lens):
Video: Misalignment Calibration
GPI Data Reduction Pipeline v1.0 Released
The GPI Data Reduction team has just released version 1.0 of the the Gemini Planet Imager Data Pipeline, which allows transformation of raw data from GPI into calibrated spectral and polarimetric data cubes and provides a variety of routines for working with these data. For documentation and download information see:
http://docs.planetimager.org/pipeline/
Support is provided via the Gemini Data Reduction User Forum:
Happy post-processing!
Hello world!
The Space Imaging and Optical Systems lab has been established as part of the Sibley School of Mechanical and Aerospace Engineering at Cornell University. Please check back soon for news and updates on our work.
GPI First Light Results Announced
The first light results from the November and December runs of the Gemini Planet Imager were announced at the 223rd meeting of the American Astronomical Society in Washington D.C. The community and public response has been incredible – see the GPI site for a list of press releases. We’ve already started planning for the next run, and the full survey, coming later this year.