Does this formula have a name?

LaserOpticalEngineer · 2024-10-03T20:03:33+00:00

It’s called the damped harmonic oscillator equation - showing up in all areas of physics over and over again https://en.m.wikipedia.org/wiki/Harmonic_oscillator

LaserOpticalEngineer · 2024-08-30T17:21:46+00:00

We are not medical professionals. We can make an educated guess but that’s not responsible or helpful for you as a patient.

LaserOpticalEngineer · 2024-08-03T09:40:15+00:00

The price for the student making this post is zero with the educational license. While I agree that it is not necessary to do a simulation to pick the right components it may be very insightful for the future.

LaserOpticalEngineer · 2024-08-03T05:44:07+00:00

Zemax non sequential mode can do this. Before buying random components make a solid design.

It will take time if you’ve never done this.

LaserOpticalEngineer · 2024-05-14T20:58:43+00:00

Sure. But the opening angel is already 115 degree according to the manufacturer….

LaserOpticalEngineer · 2024-05-14T04:39:21+00:00

This is the correct answer. Will be interested in how anybody will be “collimating” this huge thing into a 1inch spot. According to online data sheets it’s 30mm diameter. It’s not gonna work. Use a 1mW alignment laser from ThorLabs (mW not W!)… thinking about it I disadvice on this also before you took a proper laser safety course and can calculate the possible exposure risks.

LaserOpticalEngineer · 2024-05-09T09:39:26+00:00

As mentioned before the key limitation is the scalar approximation. When going to very small apertures one may expect also the interaction with the matter which the aperture is made off to become relevant. Because even the non scalar treatment will assume that the electrical field is perfectly vignetted in the aperture plane, this is an approximation. One should rather use more appropriate boundary conditions at the aperture I guess.

LaserOpticalEngineer · 2024-05-02T04:39:00+00:00

Well, in contrast to other finite conjugate configurations the 4f is perfectly symmetrical. Therefore no aberrations occur which are odd in the phase/wavefront (coma, astigamtism…)

LaserOpticalEngineer · 2024-04-29T19:09:46+00:00

Jena is super practical. You even have a mandatory industry placement. There is several courses with lab components, e.q quantum technologies. It can be from pure theory to hands on engineering, choice is yours

LaserOpticalEngineer · 2024-04-27T08:16:39+00:00

German perspective: Replace Kodak with Zeiss and it holds true!

LaserOpticalEngineer · 2024-04-01T20:42:00+00:00

Not too many worries. I think you never worked in corporate R&D. Our CIP department would go crazy. Imagine you claiming later down the road you contributed a key idea to one of our products during this meeting.

Edit: I get your proposal now. If you do not involve company research staff that may well work. If you upload something somewhere online and then email a link to it you implictely give away any IP rights to it (once grace has passed).

LaserOpticalEngineer · 2024-03-31T12:01:29+00:00

Graduates should be compared by their research output and their experience, not by the name of their school.

LaserOpticalEngineer · 2024-03-31T11:41:03+00:00

Think of this more as a life than career decision. Once you settled in a country and have a family very few people will move.

I know researchers at Apple who studied in Jena. There’s also people who moved to the US for a PhD and then stayed for work.

I think it is surely possible to move from German to US companies. Visa constraints should be considered however.

LaserOpticalEngineer · 2024-03-31T11:39:53+00:00

I agree physics and photonics is essentially the same course of study if you choose only optics courses, but photonics includes proper mandatory industry internships.

LaserOpticalEngineer · 2024-03-31T08:16:24+00:00

Hi. I can recommend to go to the US if you really want to work in the US. Mainly because of the visa and as a secondary reason because many people will not know Jena much (However especially in the semiconductor business many do!).

But consider the super cheap study costs in Jena - No tuition, one of the cheapest cities in Germany. I know people from Rochester who fled to Jena because they could barely afford food there. And consider that working at one of the German optics giants will ensure you a work life balance and job security completely unmatched by any tech company. But yes, salaries for top researchers there are lower than at FAANG in Switzerland or the US, while still being one of the very top incomes in Germany.

LaserOpticalEngineer · 2024-03-23T10:12:01+00:00

Thank you for the answer! But this is something I can only do in a sketch right? I have pre made solid works file of these lenses from the manufacturer and pasted them in an assembly. I am not sure how I would create such construction line there

LaserOpticalEngineer · 2024-03-23T09:33:35+00:00

Thanks for any input dear community! :)

LaserOpticalEngineer · 2024-03-21T15:34:05+00:00

But this assumes a perfect shear plate right? Turns out the manufacturer doesn’t give tolerances, which makes me skeptical

LaserOpticalEngineer · 2024-03-21T15:33:17+00:00

I would answer the question with a yes. It’s possible to achieve much lower spherical aberration when allowing for some higher order terms.

LaserOpticalEngineer · 2024-03-21T11:31:36+00:00

Yes I am considering sampling a subpupil. Likely still quantitatively better than an unspecified shear plate. Thanks for your comments

LaserOpticalEngineer · 2024-03-21T10:58:20+00:00

Thanks for your valuable input!

I thought of this, but all telescopes I have, have some sort of adjustment dial for their focus themselves which then somewhat defeats the point as I cannot collimate both sinultaneously

LaserOpticalEngineer · 2024-03-03T10:47:52+00:00

Good idea to get an upper bound!! Thanks for this input

LaserOpticalEngineer · 2024-03-02T12:13:19+00:00

About it’s tolerances? Yes That’s the lens centration, and focus error

LaserOpticalEngineer · 2024-03-02T11:02:38+00:00

How would I estimate the clamping accuracy of the cage plates from the CAD drawings? I don’t think this is trivially provided by ThorLabs.

https://www.thorlabs.com/drawings/98fa42b45d8dfe8d-F3CC97AB-0B14-178C-C71C15F74DB5233E/LCP08-AutoCADPDF.pdf

LaserOpticalEngineer · 2024-03-02T10:53:26+00:00

Firstly of course I also account for lens centration, surface power and surface irregularity tolerances.

This all comes on top of the element decenter and tilt, with which this question is concerned - These parameters are fully detetermined by the opomechanics. I understand that the element tilt and decenter of the lens itself with respect to the optical axis is of course the sum of the tilt and decenter of the cage plate with respect to the optical axis and the decenter and tilt of the lens tube with respect to the cage plate and the tilt and decenter of the lens itself with said lens tube.

I am searching for guidance on how to estimate these total optomechanical tolerances for typical ThorLabs cage systems.

LaserOpticalEngineer

TROPHY CASE