Hi all! I have a PhD in physics, specializing in atomic physics with lasers. I have a pretty good grip on Optics, and have taught it at college level. I want to apply for Optical Engineer roles, but I have never used Zemax. I wish to add it to my resume. What courses/certifications can i get to allow me to claim that I know Zemax? Thanks in advance!

https://preview.redd.it/lcx7jdh8e4yd1.png?width=1190&format=png&auto=webp&s=1afb1ad81a672e561a541d825738b0e50a951877

I'm doing an illustration on diffraction inside a dielectric with a metal grating. Here, two beams perpendicular to the surface fall into the grating. Refractive index n1<n2. Refracted beams in n2 become secondary wave sources and disperse in all directions. A 0th-order mode passes through the second interface. 1st and higher diffraction orders become a propagating modes if two conditions are met.:
1.the reflected beam angle is equal to or higher than the critical angle(lower than critical waves escape waveguide)
and
2. waves interfere constructively if the phase difference after reflection remains constant and equal to an even number of pi as shown in the section AC=BD. Source

Does the illustration or my reasoning have any mistakes?

Hello,

I have authored a paper on a system of Lenses: https://www.ijap.latticescipub.com/portfolio-item/B105104021024/

Your feedback is most welcome.

Thanks

I want to image an object with a fixed focal length lens and then collimate that image. I've thought of just coupling two nikon lenses together and setting the focus of one of them to infinity. Would I be better off trying something with a plano-concave lens?

I need to evaluate a lens designed to work underwater with a concave object radius of ~20mm. If I could print a pattern on the inside of a ping pong ball, that should do it. Does anyone know of a product or supplier that can do this kind of thing?

Hello! I am looking to design and assemble a multi lens element system using components I can purchase from ThorLabs. This optical multi lens element will then attach to a bare sensor.

I need 1:1 imaging of an area with a diagonal length of 7.07 mm. I need a depth of field of at least 1.5 mm and I need the total optical length of the system to be less than 200 mm. I have considered so far a single lens system but quickly found that it would not be possible and I have no knowledge of multi lens systems.

Does anyone know of any popular designs that would fit my requirements? Also any tips for going about understanding these multi lens element designs? Thanks so much for your time!

Hello! I am new to Zemax, and I could not find an operand in the manual that can effectively achieve collimated rays at a specific surface. The imaging system consists of multiple real, thick lenses, and I am trying to adjust the distances between the lenses to achieve collimation. I would appreciate any help on this question!

Inherited a vortex defender st 6 moa and want to put it on my sig Sauer fuse. Obviously the mountings are not the same... anyone find a way to make this happen?

Hi everyone!

I’m a graduate student trying to expand my reading list and have been searching for a physical copy of this book for ages. I have an electronic version but would really love a print edition. This might be a long shot, but after exhausting my options over the years, I thought I’d reach out here.

If anyone is willing to sell or could help me track down a copy, I’d be incredibly grateful. Thank you so much!

I am trying to frequency double 780nm (1ps pulse width) with a cut 2mm beta bbo crystal. There are some fringes that I am unable to get rid of. I have changed polarization as well as tilting the crystal, some feedback will be appreciated. Thanks

I'm building an image relay to magnify an image plane of a system I work on. I am using 75 and 400 mm lenses. It seems the image is in focus less than 400 mm (about 200 mm) from the second lens. This would imply my object (the image I am relaying) distance is not exactly 75 mm. Should I be concerned regarding the impact on image quality?

As a second-year undergraduate student in computer science, currently enrolled in a data science course, I recently developed an interest in optical fibers after watching several informative videos. One of my professors mentioned the possibility of writing a small research paper that could be published, which I see as a great opportunity to deepen my understanding of both data science and optical fiber technology.

I am considering exploring the behavior of light within optical fibers, focusing on how environmental factors and material properties affect this behavior. I’m unsure if this idea is feasible or if it holds enough significance in a data-driven context. I would appreciate any insights into whether this research could be valuable and what foundational knowledge I should pursue to enhance my understanding in this area.

This is probably simpler than I think:

Typically I'm used to working with camera lenses where the object is the real world and is imaged onto a CCD with some pixel pitch. When I evaluate MTF of the camera lens, I evaluate it at the sensor Nyquist frequency (based on pixel size).

With a projector lens, the object is a DMD or other display, and the image is very large and on a screen. When I evaluate projector lens performance should I evaluate it at the Nyquist frequency of the DMD? Or at the Nyquist frequency of the image on the screen?

-- the DMD Nyquist frequency in my case is 66 lp/mm (7.6um pixels), while the frequency of the large image is much smaller (for example if the image is magnified 10X, the frequency would be 6.6lp/mm) -- should I evaluate the lens design MTF at 66 lp/mm? Or 6.6lp/mm?

Hello all. I am new to this subReddit. I need your suggestions/help regarding my situation. I actually studied engineering in mechanical. After completing my undergraduation, i have joined a automotive teir 1 MNC, where there business was more into automotive interiors. 4 wheelers to be specific. I got selected for interior/ambient lighting department. So initially i was into designing stuff, that CAD modelling and all. But after 2 months of my joining, i was introduced to optical simulation. Since then i was working till date. Its been 2 years i have been into this optics field. I have learned so many thing, so much of optics/physics stuff. Everything went well till 1.5 years, after that my learning has became limited and i got to understand that there are no seniors who can guide me in this. Whatever i have learned in this 2 years journey is completely mine. And no one helped in it. But now my question is should i continue in this field.? Is it worth continuing in it? Does the payscale be sufficient enough for me to live in india as a male of age 25?

They're supposed to be blackout , but 😂. I don't mind these however , but always wondered... Can you see silhouette or anything from outside? If you go up near the curtain, no sunlight gets on my skin, and you cannot see out of it, just hazy light.

May you can help me with my question.

Current I’m using a standard tip tilt platform (spring loaded) to align a camera in XY plane. But the COG of the camera (1-2kg) has a offset to the platform. Therefore the platform is not working very well, due to less spring force.

Has anybody an idea which platform or tool can I use to align and fix the position?

Thanks

As an experiment I placed a 600l/mm transmission grating between a camera sensor and a 1.4mm F1.4 fisheye lens. The grating is approximately 10mm from the camera sensor. I aimed a red, blue, and green laser at the roof and took a picture with the camera. I was able to focus the camera so the dots from the laser were in focus however the spectra produced by the grating had weird elongated shapes. Changing the focus on the lens altered the shapes, but I couldn't get the spectra of the lasers to appear as a point.

https://preview.redd.it/u0yb2h31ufxd1.jpg?width=998&format=pjpg&auto=webp&s=afb295f8a7b15226dea8c2c7f8f55cd12f6b4767

https://preview.redd.it/m16mxarytfxd1.jpg?width=1400&format=pjpg&auto=webp&s=7aa11250c673019e63c074fe1594aee1d0c791b7

https://preview.redd.it/1lre821dpfxd1.png?width=567&format=png&auto=webp&s=4b20d97366ca8f3984aa2c02bb3a451415d04862

Does anyone know what is going on here? Does anyone know if this issue is something I can resolve? I suspected the setup would not work as it does not appear to be commonly done, but I would like to understand a bit better the cause of this.

I own a pair of naval binoculars - Square-D (Sard) 7X50. They came with click-in filters at each eyepiece but the glass filters are long gone. I had thought that they were polarized but remember someone saying "No, they are blank." Any ideas as to filling in the blank? Any idea if I can replace them?

Due to budget constraints, I can only purchase larger mirrors and cut them into smaller pieces for experiments (such as beam splitters, aluminum-coated mirrors, narrow-band filters, etc.). These mirrors typically do not exceed dimensions of 1x30x30 mm, and I need to cut them into 1x10x10 mm pieces. I attempted to use a small tabletop saw with a diamond cutting blade for this purpose, but it resulted in a significant amount of glass debris, and the edges of the mirrors became very rough. Additionally, I tried using a pen-style glass cutter, but the small size of the mirrors made it challenging to achieve a clean break along the cutting path.

Given this, I hope to find a method for cutting mirrors at home that minimizes environmental pollution while also providing a reasonable level of cutting precision. Thank you all!

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Thank you all for your responses. I tried several products and would first recommend using a Tungsten carbide pointed carving pen or a Diamond silicon wafer knife to scribe the lens, followed by separating it with pliers. Please note that this process generates glass shards, so protective goggles and gloves are required.

Hey all, I have a 1024 x 1024 2D array in Python, where each index represents the deltaOPL at that pixel. This array represents a circular plane with a diameter of 1 NA, so anything that is outside of the circular plane is set to nan. Here is a photo of what I have.

https://preview.redd.it/aohjlh0b0cxd1.png?width=969&format=png&auto=webp&s=f974118d213de3430006b74d754a4638c3fae85a

My question is that how can I generate a point spread function for this data, and how can I plot it? I found some libraries but couldn't get them to work. Any help would be much appreciated!

i am a mechanical engineering student and i have a project which includes optics, so i don't understand how everything works

if i have a camera module with the following specifications

  Model: A3550S
  *   Image sensor: Aptina 1/2.5" color CMOS
  *   Resolution: 2592x1944 pixels (5M pixels)
  *   Pixel size: 2.2 um x 2.2 um
  *   Frame speed: 2fps at 2592x1944, 3fps at 2048x1536, 5fps at 1600x1200, 7.5fps at 1280x1024
  *   Interface: USB 2.0 only
  *   Inserts into 23.2mm eyepiece tube
  *   Adapters fit 30mm and 30.5mm eyepiece tubes
  *   Dimensions: ?27.2mmx40mm
  *   Operating Environment: -10°C to 60°C
  *   Power: Direct via USB port
  *   Gross Weight: 0.62 kg

and it is attached to X10 objective how can i calculate how much area does the camera capture in one second at 2fps at 2592x1944

someone helped me and preformed this calculation but i don't understand how they did this calculation and i need to explain it scientifically referring to the formulas of optics

Sensor size is 1/ 2.5 inch = 10.16 mm

Objective X 10

https://preview.redd.it/d6lx7yds4bxd1.png?width=468&format=png&auto=webp&s=d6015e535bd7ee1459c95f2067fa4d5371bd6359

Hi, I'm currently an EE student focusing on RF. I think RF is alright but optics has caught my attention and I have a few questions.

How in demand are optical engineers (is the US to be specific)?
Do you need an MS or PhD to break into it? If so, how difficult is it to get into grad school for optics?
In general, would you recommend it?

Thanks,
fottortek

In my simulation, I am trying to analyze the downlink beam affected by atmospheric turbulence. The plot for the standard deviation of the coefficients is shown below both for the receiving telescope aperture with(0.3D) and without obscuration.

https://preview.redd.it/6gt2u42on5xd1.png?width=640&format=png&auto=webp&s=6a975898909196fa22926d89d0e19fa567b8a125

The coefficients for the one with obscuration have some peaks that belong to defocus, primary spherical aberration, and so on (basically one consisting of the central intensity distribution). While I feel like this is correct since the central part of the beam is lost by the obscuration and the Zernike decomposition fits the wrong amplitude, I am not sure if this is correct.

https://preview.redd.it/wrvpa41hl2xd1.png?width=1293&format=png&auto=webp&s=6c8a92f2dd872e453e61dd470ccfde9f0671680f

I'm trying to figure this out in the RF domain, but it seems like people in the optics world might have a more intuitive sense for it.

Let's make it two-dimensional. You've got a source at some wavelength, a wall, and a convex circular reflector off to one side.

How big does the circle need to be for the signal to reflect to the other side of the wall, rather than just diffracting around the reflector? Would a sphere with a radius on the same order of the wavelength do the job? Or does it need to be substantially larger?