Evaluation of a 256 × 256 PtSi array for infrared ground-based astronomy

A. Fowler, R. Joyce, I. Gatley, J. Gates, J. Herring

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


This paper will show that large format PtSi Schottky diode infrared arrays are competitive alternatives to the smaller format photovoltaic arrays for ground-based astronomy. The modest quantum efficiency of the PtSi compared to the photo-voltaic devices is more than compensated for by the larger format. The particular array discussed here is the Hughes 256 X 256 hybrid Schottky array. The use of hybrid technology yields effective fill factors of nearly 100%, which further offset the modest quantum efficiency limitations. The very low dark current, low noise, imaging characteristics, cost, and solid nitrogen operating temperature add to the effectiveness of this array for ground-based imaging. In addition to discussing the characteristics of this array, we will present laboratory test data and astronomical results achieved at Kitt Peak.

Original languageEnglish (US)
Pages (from-to)22-31
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Oct 11 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Evaluation of a 256 × 256 PtSi array for infrared ground-based astronomy'. Together they form a unique fingerprint.

Cite this