Linear Polarization A4 Sheet Polarizer Educational Physics Polarized Filter Optical

This worked perfectly for me. I'm no expert but it appears to me that this sheet is of high-quality. I cut it into pieces using scissors. When two pieces are at 90 degrees it looks totally black both viewing sunlight and my monitor. Rotating a piece while viewing the monitor shows that the monitor is polarized and there is a spot where the monitor cannot be viewed at all. The same experiment thing with sunlight shows no effect at all as expected. The sheet arrived in perfect condition. Even though it was slightly rolled when placed in my mailbox it suffered no ill effects. It came in a protective plastic bag and also had a thin protective film on both sides. I'm delighted with the quality of this item.

Alta calidad y fácil de usar La hoja polarizadora A4 es de muy buena calidad, delgada pero resistente, y funciona perfectamente para proyectos de óptica o manualidades. Se corta y manipula fácilmente, y el efecto polarizado se nota claramente. Muy recomendable para uso educativo, profesional o creativo.

Same shade/color as oem. Have bought others that had a gold hue instead of gray

Product seems legitimate, and works for my needs. Unfortunately, the product was severely damaged during shipping. This is unexpected, because I picked up the product from an Amazon Locker. While disappointing, I planned to cut the sheet and the damaged area did not greatly impact my usage.

Very clean polarizer. Caution: If you learn about polarizers, you will discover that it is not a true filter, but changes the light rather than filtering. This can be altered by a nearby substrate like the protective sheet. So the polarizer effect is the strongest once you remove the protective coating. I was worried that it was not a good polarizer until the sheet was removed which allowed it to block more polarized light. Made for a great Spiderwick Chronicles birthday surprise. My daughter wanted this theme for her birthday and if you have seen the movie, there is an element where he looks through a circular stone and suddenly he can see the magical world around him. After brainstorming on how I could achieve the effect, I found that an LCD monitor shows blank white if you remove the polarizing film. So I did that and inserted a piece of this polarizer into a fake circular stone for each kid. Then the magic was that they could search through the house and find the Magic Window (lcd screen) and they could see the picture only by looking through their stone. They loved it

I bought these to be able to demonstrate various effects with polarized light, and this polarizer has exceeded my expectations in quality. I cut the sheet up into 4 smaller sheets so I could demonstrate crossed polarizers, quantum spin effects, and rotating electric fields in corn syrup. I have also used these to see polarization in reflective surfaces, the sky, and laser light. So far I haven't had any durability issues with the coating, but I have been treating them carefully and haven't had them for too long

I needed a polarized sheet for our security camera that's facing out a window. This sheet worked perfectly for that by reducing the glare substantially and preventing reflections of the camera on the window. It seems like many of the bad reviews are because of the protective film that is on the sheet when it arrives. There should definitely be a "remove first" sticker on the protective covering. At first I thought the film was scratched and blurry, but it was just the protective covering.

I used this film to make a simple filter in an attempt to cut the interior reflections that come off the windshield and into my dashcam's lens. The results are fantastic. Rotate the film in front of the lens until the reflections are minimized, then cut and attach a small piece to the dashcam with a dab of superglue.