Optically multiplexed two-dimensional imaging arrays

Eric R. Craine

doi:10.1117/12.176687

1 June 1994 Optically multiplexed two-dimensional imaging arrays

Eric R. Craine

Proceedings Volume 2198, Instrumentation in Astronomy VIII; (1994) https://doi.org/10.1117/12.176687
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

In an effort to overcome the small size of optical and IR imaging arrays a wide range of techniques for building mosaics of small arrays has been attempted. These methodologies are typically handicapped by one or more shortcomings, including a severe limit on the number of detectors which can be built into the mosaic, physical (non-imaging) gaps in the array, or difficulty of fabrication of imaging optics. We have developed an optical technique which has the capacity to enable extremely large mosaics of 2D arrays, while at the same time exhibiting absolutely no gaps between the elements of the mosaic. Further, through parallel processing of the detectors in the mosaic very high speed readouts of the image data are possible relative to than achievable with comparable large monolithic arrays (if they could even be fabricated). Several laboratory bench prototypes of this imaging system have been built and tested with outstanding results. We discuss the possible optical configurations of the system, techniques for aligning the arrays, and possible configurations for use at the telescope. Examples of test imagery obtained with the prototypes are shown.

Citation Download Citation

Eric R. Craine "Optically multiplexed two-dimensional imaging arrays", Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); https://doi.org/10.1117/12.176687

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KEYWORDS

Imaging arrays

Charge-coupled devices

Prototyping

Sensors

Beam splitters

Imaging systems

Multiplexing

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