Hadamard transform infrared astronomical imaging device
Abstract
A 255 picture element imaging device for astronomical applications in the J and K atmospheric windows (1.5- to 1.8-micron and 2.0- to 2.4-micron wavelength, respectively) is described. Spatial information is optically encoded and detected by a LN2-cooled detector. Electronic decoding is achieved during measurement by means of a special purpose computer. Under seeing and scintillation noise limited conditions, a multiplex advantage of a factor of 8 is attained.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- November 1976
- DOI:
- 10.1063/1.1134540
- Bibcode:
- 1976RScI...47.1331S
- Keywords:
-
- Astronomical Photography;
- Atmospheric Windows;
- Data Reduction;
- Infrared Imagery;
- Signal Detection;
- Transformations (Mathematics);
- Computer Techniques;
- Decoding;
- Display Devices;
- Electronic Control;
- Infrared Astronomy;
- Scintillation;
- Signal Encoding;
- Signal Processing;
- 94.70.Fh;
- 94.70.Tw;
- Instrumentation and Photography