Submitted via IRC for takyon
New BGU System Produces High-Res Images at Low Cost
An article in the December issue of the journal Optica demonstrated that nanosatellites the size of milk cartons arranged in a spherical (annular) configuration were able to capture images that match the resolution of the full-frame, lens-based or concave mirror systems used on today's telescopes.
BGU Ph.D. candidate Angika Bulbul, working under the supervision of Prof. Joseph Rosen of BGU's Department of Electrical and Computer Engineering, explains the groundbreaking nature of this study, saying it proves that by using a partial aperture, even a high-resolution image can be generated. This reduces the cost of traditionally large telescopic lenses.
"We found that you don't need the entire telescope lens to obtain the right images. Even by using a partial aperture area of a lens, as low as 0.43%, we managed to obtain a similar image resolution to the full aperture area of mirror or lens-based imaging system. The huge cost, time and material needed for gigantic traditional optical space telescopes with large curved mirrors can be slashed," she said.
(Score: 0) by Anonymous Coward on Tuesday January 08 2019, @08:49PM
BGU is the new black of block chain.
(Score: 3, Informative) by Anonymous Coward on Tuesday January 08 2019, @08:58PM (4 children)
Isn't that regular old astronomical interferometry? It's well known that two small telescopes placed 100m apart, when used together, have the same resolution as a single 100m telescope, and this technique is used today by many telescopes all over the world. The primary advantage of using a single larger telescope is not resolution, but the greater aperture allows imaging of dimmer objects.
(Score: 1, Interesting) by Anonymous Coward on Tuesday January 08 2019, @09:28PM (3 children)
Indeed. The advantage of a single aperture is greater light gathering power, as you point out. The advantage of interferometry is better resolution. However, interferometry suffers from a missing flux problem. [csiro.au] Is that going to be an issue for them?
(Score: 3, Informative) by requerdanos on Wednesday January 09 2019, @03:30AM
(Score: 2) by qzm on Wednesday January 09 2019, @04:12AM
Well, that and flying a rotation constellation of microsats with sub-wavelength precision while pointing at different objects.
Which would beg the question 'would it really be bigger/heavier/harder to just have them physically attached'
This sounds a lot like an academic though-experiment with little consideration for actual implementation.
Let along the usual BS headline - it doesnt produce anything, its a concept, unless I missed something. They havnt actually built, let along flown one
operationally.
(Score: 2) by Tara Li on Wednesday January 09 2019, @03:49PM
Interesting. I was going to comment that this technique might be useful for sources with sufficient brightness, such as planets and asteroids here in the main body of the solar system, but apparently not necessarily from the information given in that slide show. Of course, more and more smaller separated units starts to approximate a solid mirror, but possibly with a commiserate increase in computation to convert the incoming data to usable imagery.
(Score: 2) by SemperOSS on Wednesday January 09 2019, @08:32AM
... in Israel for those who do not know — not Bishop Grosseteste University in Lincoln, England. (Had not heard of the latter until i looked up BGU.)
I don't need a signature to draw attention to myself.
Maybe I should add a sarcasm warning now and again?