r/Optics

hello guys, I am a master's student working on laser and flames.
I have taken the image of flame using laser sheet(using concave and convex cylindrical lenses).
After analyzing the data, I could see some ring shaped traces on the ROI(where the laser sheet exists)

Can you guys figure out what are these?

I have worked on several experiments, but these rings come up occasionally.

https://preview.redd.it/bell3ssjntuh1.png?width=1845&format=png&auto=webp&s=6d8f223fe72245e991d51ab79b5d4c78491d7656

I'm attempting to build a simple smartwatch in the style of a classic LCD digital watch. I've got a fully functional prototype using a Sharp memory display, a reflective display, but I can't work out a way to add a front light to see it at night. Years ago I had a cheap Kindle front light thing, and that was just a battery holder, a couple of LEDS and a sheet of transparent plastic, and worked surprisingly well. Trying just a bit of perspex gives me a nice glowing square on top of the display, but with nothing to guide the light perpendicular it doesn't show the screen.

It looks like I need a specific light guide with a fine structure on the side facing the panel. Could this be as simple as a fine polish to make the surface imperfect?

I've been looking Around AliExpress etc to see if any off the shelf plates or films exist, but it seems not, so it's either finding a commercial display to salvage from or find a way to DIY it.

Hey everyone, my first post here and looking to get some help.

I’m not an optical engineer and have a very limited scope of knowledge so please be patient with me.

I am attempting to make a “video tap” inside an old film camera which takes a beamsplitter and sandwiches it between the optical viewfinder and the camera body, sending an image to a small camera.

The problem that I am now facing is that because i’ve effectively added a 2” gap between the camera and viewfinder, the vf no longer can focus on the ground glass in the camera.

So my question here is what type of optic should I be looking for when trying to relay the image from the camera groundless back into focus? I don’t want to modify the camera or viewfinder in any wayz

Thank yku

Hello everyone, I’m currently in my senior year majoring in Electrical Engineering. I wanted to know how can I get a job or what type of jobs in optics/photonics and laser science that takes in people with bachelors? I’m planning to do grad school, but I’m going to do that later in a year or two after graduation. I’ve had a hard time finding roles that pay decent for optical test engineer roles that doesn’t require a PhD or 5+ years of experience. Any options that I should look into? I’m geographically from Minnesota, so finding a photonics jobs here is very hard, I’m more than open to relocate (preferably in the coast (northeast, pacific or mountains).

Edit: I do have research experience in laser plasma interactions and never had an internship before. I wanted to apply for PhD programs, but my gpa is low for that right now and I want to use my experience and solid LOR and SOP to make it up for it.

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