Optimizing Charge-Coupled Devices For Red And Near-Infrared Observations

M. P. Lesser; E. Olszewski; Gary R. Sims; Fabiola Griffin

doi:10.1117/12.952506

23 May 1989 Optimizing Charge-Coupled Devices For Red And Near-Infrared Observations

M. P. Lesser, E. Olszewski, Gary R. Sims, Fabiola Griffin

Proceedings Volume 1071, Optical Sensors and Electronic Photography; (1989) https://doi.org/10.1117/12.952506
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Methods to improve the red and near-IR quantum efficiency (QE) of CCDs are discussed. The effects of thinning, antireflection (AR) coating, and mounting CCDs for use in astronomical observations at wavelengths greater than 700 nm are presented. Thinning CCDs to inside their epitaxy and backside illuminating them increases their QE over thick devices even in the far red, due to the absence of frontside absorption and reflection losses. AR coatings decrease the backside reflection loss and greatly reduce the amplitudes of interference fringes. Mounting CCDs on a substrate eliminates surface warpage which improves the user's ability to correct for instrumental and background signatures. Some of these optimization techniques are demonstrated using the Photometrics PM512 CCD made by Ford Aerospace.

Citation Download Citation

M. P. Lesser, E. Olszewski, Gary R. Sims, and Fabiola Griffin "Optimizing Charge-Coupled Devices For Red And Near-Infrared Observations", Proc. SPIE 1071, Optical Sensors and Electronic Photography, (23 May 1989); https://doi.org/10.1117/12.952506

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