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> with unprecedented nano-fabricated coatings with sub-wavelength structure on optical glasses. Also known as an anti-reflection coating. Definitely not unprec
by smaddox 2y ago
> with unprecedented nano-fabricated coatings with sub-wavelength structure on optical glasses.
Also known as an anti-reflection coating. Definitely not unprecedented.
Cool project, though.
- gelstudios 2y agoFrom the various links in the comments, the telescope uses special filters in front of the lenses to capture the faint glow in specific wavelengths emitted by the circumgalactic medium (a new word for me!) aka "gas" around galaxies.
- gammarator 2y agoThat’s exactly why they are using commercial lenses! Canon’s modern AR coatings are so good that the performance for low-surface brightness imaging beats larger-aperture telescopes which can gather more light but scatter it around the image. See the third page of https://arxiv.org/abs/1401.5473 https://arxiv.org/abs/1401.5473