Quote:
Originally Posted by madbadgalaxyman
An interesting recent development in CCDs is some CCDs that have their maximum sensitivity in the near-infrared.
CCDs used in the Jasmine Space Astrometry mission will have a 90% quantum efficiency at 0.9 micrometers wavelength.
I don't think these are the exotic "infrared only" CCDs with all their attendant problems.
This could enable amateurs to do near-infrared imaging, a useful thing for Milky Way objects which are highly obscured by dust, as the infrared photons have a habit of getting past the dust grains.
|
I have done NIR imaging using a ST-X10ME which has QE of around 65% at 0.75 microns and drops to around 30% at 0.9 microns.
Recently I tried a test image of the emission nebula RCW71 which is located behind the Coalsack in near infrared but found the results disappointing. An unfiltered luminance image was much brighter.
I suspect that I will have far better luck on obscured objects which have a continuous spectrum such as galaxies and globular clusters.
Regards
Steven