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A large, not to mention heavy, cryostat, from Pulse Ray Machining arrives at UVa - July 27, 2010.

John and Fred install "Fold 1" on an empty optical bench - August 30, 2010 (left). All optics installed but no fibers or arrays yet - October 28, 2010 (right)

Warm testing with a video rate InGaAs (H-band) camera - October 28, 2010.

Fiber installation - mid-December 2010.

Full system (left) and array mosaic installation (right) - December 24, 2010.


Krypton lamp - January 17, 2011. Left image shows all three focal planes with red (1.7um) on the left, blue (1.5um) on the right. The right image zooms on a spectral line near the center of the array.

Solar spectrum - January 17, 2011.

Extracted solar spectrum. For comparison see this plot of absorption from atmospheric constituents.

Calibration setup: Integrating sphere, fiber bundles, telecentric coupling lens, and light sources.

Littrow ghost in krypton spectrum (left). Complete ThArNe spectrum (right)

A physically curved slit becomes straight in the images - with small curvature for each (physically linear) v-groove block.

John Wilson et al.
18 Jan 2011