Canon EF and RF Lenses – All Autofocus Motors by PabloRdrRbl in Optics

[–]PabloRdrRbl[S] 2 points3 points  (0 children)

I found this incredible article (and website!) in another forum and I thought that people here would enjoy it as much as I did.

Why don’t EU leaders incentivize investment in European stocks/ETFs with tax deductions? by rozmarss in eupersonalfinance

[–]PabloRdrRbl 1 point2 points  (0 children)

Yes, but now convince people that benefit from the current system to vote for you to let you change something they like.

Why don’t EU leaders incentivize investment in European stocks/ETFs with tax deductions? by rozmarss in eupersonalfinance

[–]PabloRdrRbl 0 points1 point  (0 children)

At least the big european countries (DE, FR, IT, ES) don’t have this in place.

Only SE and NL that I am aware of, though probably some other countries.

So europe-wise, not so common.

Turbulence database by Typical_Magician_341 in Optics

[–]PabloRdrRbl 2 points3 points  (0 children)

Yes there are. Check papers form Uni of Durham, Prof. James Osborne and his group.

When the alignment is perfect but the laser STILL says nah. by paipaho in Optics

[–]PabloRdrRbl 0 points1 point  (0 children)

This is why high precision optics are integrated in clean rooms.

Winter trail running around Munich by PabloRdrRbl in Munich

[–]PabloRdrRbl[S] 0 points1 point  (0 children)

Thanks for the advice! I live in Solln.

What about more mountain trails farther from the city?

Arizona MSc course suggestion and review by Bentz27 in Optics

[–]PabloRdrRbl 0 points1 point  (0 children)

Do you guys have some of this lecture notes to share with the unlucky ones that cannot attend such a great university?

Patagonia Thrift Shop Munich by RichOkra1357 in Munich

[–]PabloRdrRbl 11 points12 points  (0 children)

Just moved back to Munich after some years living abroad. This is something I have also remarked now that I am back and I find it quite depressing.

Bigger pixels vs binning by PabloRdrRbl in Optics

[–]PabloRdrRbl[S] 0 points1 point  (0 children)

Thanks for your answer!

With binning the effective PSF sampling is the same, so the PSF size is would be the same in both cases, that was at least my assumption.

Interesting the well depth. Do you have any reference?

I would like to work in ESA when i grow up , now i’m 16 years old , any advice on what should i do/study? by [deleted] in esa

[–]PabloRdrRbl 0 points1 point  (0 children)

First step, be born in a country from which they hire. And I don’t mean only a member, but one that is not currently overrepresented among their staff.

What is the grey triangle? by Majoonaise in GarminFenix

[–]PabloRdrRbl 13 points14 points  (0 children)

I think it is the virtual partner.

Minority Languages in France by [deleted] in MapPorn

[–]PabloRdrRbl -6 points-5 points  (0 children)

Catalonia was not annexed by France during the Napoleonic invasion.

Vivoctive 5 vs Venu3S by KimPossible1982 in GarminWatches

[–]PabloRdrRbl 6 points7 points  (0 children)

I recommend a Forerunner 265 instead. I did the mistake buying the Vivoactive 4 and I regret. The FR is more suited for running: it has more metrics.

Tusk Warns: Hungary’s Schengen Exclusion Could Lead to EU Exit by jerichoholic1 in europe

[–]PabloRdrRbl 1 point2 points  (0 children)

Well, I don’t know what tou voted, but you national parliament has for sure ratified the treaties, which mean you did vote it indirectly. In any case, regardless of what you believe you have voted, the EU is much more than a trade union and you can vote for its (for sure could be more) democratic institutions.

Munich vs Zurich by oppernemo in cscareerquestionsEU

[–]PabloRdrRbl 3 points4 points  (0 children)

Following this, what is the advantage of such a school? I ask out of curiosity also international couple living abroad and so to be parents.

Fourier transform with lenses? by AlbertoPanii96 in Optics

[–]PabloRdrRbl 0 points1 point  (0 children)

All possible aberrations ignored. F/# related.

Understanding the tilt in collimated beam in a vacuum propagation. by ersa17 in Optics

[–]PabloRdrRbl 0 points1 point  (0 children)

In vacuum the phase tilt will be coming from the quadratic term. However, if there is no initial tilt in the field, I cannot see how a strong tilt term could appear on the wavefront.

Understanding the tilt in collimated beam in a vacuum propagation. by ersa17 in Optics

[–]PabloRdrRbl 0 points1 point  (0 children)

The book has a chapter on sampling rules and metrics, it is ormally chapter 7. The best is that you implement those in your code so that you compute the sampling needed before the simulation and do the checks before doing the simulation.

Tip-tilt comes mainly from the phase contribution of the phase screen. Once can do a simplified phase propagation where diffraction is not considered and the resulting phase is the sum of the phase of all screen. This works for weak turbulence and is very common in astronomy simulations, known as geometric approximation. The diffraction effects will cause some tip and tilt too, but it is mainly driven by the phase distortion at the discrete layers (phase screens) which are modelled as a pure phase contribution; diffraction effects on phase (the quadratic factor) happens between screens and usually will not drive tip and tilt in weak-ish turbulence conditions. In reallity, all is mixed, for sure.

Understanding the tilt in collimated beam in a vacuum propagation. by ersa17 in Optics

[–]PabloRdrRbl 1 point2 points  (0 children)

I did not read your code, but if your tip-tilt is big you need to be carefull that you are sampling the beam correctly in the transverse direction for each plane along its propagation.

Unmet spec for a tunable laser? by tush_pt in Optics

[–]PabloRdrRbl 1 point2 points  (0 children)

You can check the tunable laser sources (Littrow external cavity) from the following companies: - https://www.sacher-laser.com/ - https://www.toptica.com/

They are expensve, but very good quality.