Modulation Transfer Functions of some Solar Recording Films
Abstract
The modulation-transfer functions (MTF) of four solar recording films (Eastman-Kodak: 103a-G, IV E, RAR-SO-375; Gevaert: Duplopan-Rapid) are measured with the aid of an interference device. The MTF is used to estimate the smallest detectable element of a two-dimensional pattern; the so-called `detectability threshold' a* depends on: intensity modulation m, square of MTF, required signal-to-noise ratio q, gamma and granularity of the film. The calculated values of a* for the four emulsions are given in Table II. Finally the influence of exposure time on image quality is discussed.
- Publication:
-
Solar Physics
- Pub Date:
- September 1967
- DOI:
- 10.1007/BF00155922
- Bibcode:
- 1967SoPh....2..211B
- Keywords:
-
- Image Quality;
- Transfer Function;
- Exposure Time;
- Detectability Threshold;
- Intensity Modulation