Diffractional effects at continuum (images are grey-scaled
individually) observed
images Continuum
λ525 nm
(0.0287”/pix) Courtesy M. Schüssler 7.3” “true
object” Ø50 cm Diffr.limit =
0.2166” Ø100 cm Diffr.limit =
0.1083”
Sunrise Team Meeting
Freiburg, Sept. 1-3, 2004 Image Quality in SUNRISE
Model of solar granulation
in continuum (200G)
Pixel size: 0.0287’’
Nyquist Freq.: 1./0.0575 arcsec-1 7.3’’ Courtesy M.Schüssler True object
Diffractional effects at continuum (images are grey-scaled
individually) observed
images Continuum
λ525 nm
(0.0287”/pix) Courtesy M. Schüssler 7.3” “true
object” Ø50 cm Diffr.limit =
0.2166” Ø100 cm Diffr.limit =
0.1083”
Diffractional effects at continuum “true
object” observed
images (images with common grey scale) Courtesy M. Schüssler Ø50 cm Diffr.limit =
0.2166” Ø100 cm Diffr.limit =
0.1083” Continuum
λ525 nm
(0.0287”/pix) 7.3”
Figure errors: f=S aj Zj , (j=4,....,15) aj chosen to have random values ranging [-1,1], and then rescaled to meet the desired wave front aberration: frms Number of realizations per simulation : 200
Size of the resulting field of view: 7.3’’ x 7.3’’ Simulations of degradation by figure errors
in the focal plane of IMAX Noise and ripple are not considered Defocus
D = 1 m ; central obscuration=0.23
Cutoff frequency: 1/0.1083 arcsec-1
Amount of aberration considered: frms= l/5, l/7, l/10, l/14 Simulations of degradation by figure errors
in the focal plane of IMAX D = 0.5 m ; central obscuration=0.23
Cutoff frequency: 1/0.2166 arcsec-1
Estimated amount of aberration: frms= l/18 IMAX parameters: Solar-B parameters:
SUNRISE vs. Solar-B Ø φ_ rms Strehl
(cm) (waves)
SUNRISE vs. Solar-B Ø φ_ rms Strehl
(cm) (waves)
SUNRISE vs. Solar-B Ø φ_ rms Strehl
(cm) (waves) frms=l/5
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