u/PeppersONLY

https://preview.redd.it/rvmpx5c4j8kh1.png?width=757&format=png&auto=webp&s=e803401b797b5306465fb8882da0d78715700553

Rough diagram without polarization

This is a birdbath AR optics setup with a 0.23in OLED micro display, a linear polarizer, a polarized beamsplitter, a QWP, and a concave mirror. The light from the display becomes P-polarized relative to the PBS after passing through the LP so it passes through the PBS without reflecting. Then after the image is magnified and passed through the QWP twice so the magnified light is now S-polarized, it reflects off the PBS into the users eye.

The issue I have with the setup is that since the display produces a diverging light source, the diverging light that doesn't hit the PBS coating at a AOI of 45deg is then reflected through the front side of the setup. Only when viewing through the front of the PBS (the part where no light should be seen) with your eye at around 45deg from the PBS coating, the light then disappears because the polarization state was properly filtered. When viewing from any other angle you can see the unmagnfied light.

I have tried using plano convex lens and aspheric lens to collimate the light before it reaches the linear polarizer so that all light would be 45deg AIO to the coating but none solution seem to work. I have a aspheric lens with a 3mm FL and when placed 3mm from the display the same behavior occurs.

Am I wrong about why the PBS only works properly when viewed at a certain angle? What are my options to figure out a solution?

I put a MY1020 48v 1000W motor on my bike frame and attached the chain to the rear hub sprocket. The motor has a 11t gear on its shaft and the rear hub has a 16t gear. When getting going the motor was spinning super slow and having a rough time which I think heated it up alot. Is the gearing the issue here? The battery I have has a 30A BMS so it can have a lot of current drawn.

I launch BF6 through Steam and EA and update small window thing finishes and the black application opens, my PC BSOD's and says page fault in nonpaged area 0x50 (eaanticheat.sys). My game was running fine before season 2 update but once I just updated it no longer works. Any ideas why this is happening?

I launch BF6 through Steam and EA and update small window thing finishes and the black application opens, my PC BSOD's and says page fault in nonpaged area 0x50 (eaanticheat.sys). My game was running fine before season 2 update but once I just updated it no longer works. Any ideas why this is happening?

I launch BF6 through Steam and EA and update small window thing finishes and the black application opens, my PC BSOD's and says page fault in nonpaged area 0x50 (eaanticheat.sys). My game was running fine before season 2 update but once I just updated it no longer works. Any ideas why this is happening?

I have a setup with a micro oled display, that goes through a beamsplitter then reflects back up from a concave mirror that diverges/magnifies the image and then back through the beamsplitter to the eye. I added the Fresnel lens shown in the image above with its top face being placed exactly at 3mm from the micro oled display. The image produced that goes to the eye; I can see the colors of the display, but I mostly just see the grooves of the Fresnel lens. I have verified orientation and focal length distance. I have also tried to increase and decrease the distance between the lens and the display. Are these lenses just not suited for small displays or high resolution imaging?

https://preview.redd.it/9xyfgaboxxah1.png?width=1288&format=png&auto=webp&s=e8faaf5a641136d970e46c1bede542891998951d

https://preview.redd.it/hjekccw62yah1.png?width=763&format=png&auto=webp&s=ad0be9392b9717f8628a860e29212e0c6928170e

I have a test setup with a small display, a linear polarizer, and a polarized beam splitter. I am polarizing the light so that it should all pass and not reflect. At certain angles when looking at the display at about 45 deg, the display gets really dim and almost not visible indicating that its passing through. At other angles the display is visible clearly. Why is this the case if the light is polarized regardless of the angles? Would collimating solve this issue?

I have a test setup with a small display, a linear polarizer, and a polarized beam splitter. I am polarizing the light so that it should all pass and not reflect. At certain angles when looking at the display at about 45 deg, the display gets really dim and almost not visible indicating that its passing through. At other angles the display is visible clearly. Why is this the case if the light is polarized regardless of the angles? Would collimating solve this issue?

I have a OLED display emitting light into a linear polarizer and then into a cube polarized beamsplitter. When looking through the beamsplitter straight on at a specific "central" angle the display is nearly visible and almost completely dimmed. Looking at slightly different angles to the display it becomes brighter and more visible.

Is this because of the linear polarizer?

https://preview.redd.it/eopqbxcs6e4h1.png?width=1201&format=png&auto=webp&s=2dc635d2bdc894c059acbc9423935cd4944eff78

How would I go about modeling these sunglasses including all the curves like those in the side view and top view? I would like to use sketch splines mostly but how would I do that with all 3 angles?

I have a setup with a OLED display with a linear polarizer that is directed at a PBS with a quarter wave plate inbetween. A concave mirror at the bottom reflects light back up to the PBS. Everything works okay except the image produced back at the PBS has ghosting and I see a second slightly dimmer and offset image. Could this be because I bought a relatively cheap PBS off aliexpress that does not have a AR coating? All these components are mounted on a 3d printed sliding structure which may cause minor inconsistencies with alignment. If the AR coating is the issue, is there a way to add it as a separate component?

https://preview.redd.it/j8zmdxa3uz1h1.png?width=1806&format=png&auto=webp&s=1eeae25da546c89f93dc07551fc8dc494c3e009d

I am trying to replicate the optics setup in the image above. Everything is similar except I have a OLED display with a linear polarizer as the light source and my reflective surface is a concave mirror. Everything works okay without the QWP and light is visible through the PBS but when the QWP is added at 45deg of the fast axis, the image through the PBS is blurry, "smothered out", and unfocused? Why could this be happening if all optical components are for broadband visible light waves?

PBS: https://www.aliexpress.us/item/3256802176498685.html
Linear polarizer: https://www.amazon.com/dp/B0D2DK3XV9

I have a OLED display oriented facing towards a PBS with a linear polarizer in-between. From my understanding, the light should go all through the PBS and none should be reflected if the linear polarizer is oriented properly. However, no matter the orientation of the linear polarizer, I can still see the light from the display being reflected at the PBS. The only change really is at some 90* intervals it appears slightly dimmer but that's all. Is there something wrong with this setup or maybe the components I have aren't the right spec?

I am ordering a small glass disc off Alibaba which is no more than a pound and its $5 but they are saying DDP shipping to U.S is $42. Is this accurate or am I getting ripped off.

I am ordering a small glass disc off Alibaba which is no more than a pound and its $5 but they are saying DDP shipping to U.S is $42. Is this accurate or am I getting ripped off.