Polarizing Film Sheet - set of 10, Model: 93493, Gadget & Electronics Store

I used these to temporarily convert a regular bright field microscope to a polarizing microscope. You need the top filter above the objectives and below the eyepiece. You need the bottom filter just above the light source. You turn the bottom filter to get the effect you want. It works great with crystals like ascorbic acid crystals. These sheets seem to be high quality and a good value. They are sufficiently thick, but cut easily with scissors to make circles. They have protective plastic on both sides which you peel off. The protective plastic is held on by static cling. There is no adhesive.

I purchased these filters for demonstrations in my physics classes. From each 8 cm x 8 cm square, I cut four smaller squares, which were still sufficiently large enough for my purposes. In most of the images, I am holding 8 cm squares that still have their protective films on. Pairs of filters did a good job at blocking light when their axes were turned 90° from each other. An individual filter noticeably cut down on the glare of light reflecting off of the linoleum tiles in my classroom (I've included a photo of the polarization axis parallel to the floor, and another perpendicular to the floor, for comparison).

These are perfect for the price and for simple demonstrations of polarization. Just don't expect a perfect polarizer. It lets some blue light in when they're turned to 90 deg of each other. Remember to remove the plastic wrap on both sides. Try stretching some of the plastic wrap in one direction, and place it between the two polarizers (when they're at 90 degrees from each other) if you want a nice demonstration of what they can do.

Used these to fix my Yamaha LCD Tachometer. The lcd screen was no longer readable and the outer piece of film had curled up. I gambled $10 that I could do it myself vs $250 for a new tach. I won. These are the perfect size for doing the job. I still have enough left over to do more gauges. Fix your lcd screens yourself. Dont throw them away and buy new. It's really not that hard. If you're gonna toss it try and fix it first. You have nothing to lose.

These polarizing sheet are intended for kids to play with. Do not buy these for professional use. It would be impossible for you to take pictures through these sheet. The quality if below terrible, and they are full of scratches. EDIT: To all people who answered, I have to make an edit in this review. These polarizing sheets come with a protective plastic layer on the front and on the back. When I was using them I did not take them off, thinking it was part of the polarizing film. For this reason it was very hard to see thru and the quality was terrible. When I took them off however, the scratches were gone and the quality was good, even to take pictures though them ! Remember to take off the protective film on the front and on the back !!

Bought a lot of these to cut up and give away to every student in school for a Shared Science Experience. Can't beat the price for what you get. Remove the protective film from front and back and they work quite well. As stated by others, when turned 90 degrees you don't get complete light blockage as the blue end of the spectrum bleeds through. The only filters I could find that would do give better blockage cost 10 to 20 times as much as these, which just isn't feasible when trying to serve 600+ people. Quick safe shipping. In addition to the peel-off protective film on both sides of each piece, each square arrived in its own plastic baggie inside the box.

Got for use as a science project but see potential use for photography or other applications but sheets are very small and didn't seem worth it overall but was the most affordable option out there. FYI seller, not everyone needs 10 sheets or wants that specific size.

The film has dents / holes / warps in it. They're all so bend that they won't lay flat at all They turn blue instead of black (they let blue light through?)

はさみで4つに切って使います。偏光板の組み合わせ実験で8cm×8cmを使っていましたが、10cm×10cmなら4等分（5cm×5cm）しても許容できる大きさです、費用を抑えられました。

Excellent product. Good value. Worked very well.

Used this to bring a couple of Bandai Wonderswans back to life, worked great!

El artículo llegó antes de lo programado y en perfectas condiciones. Tal como lo indican en la descripción, contiene 10 hojas de polarización lineal, cada una protegida por ambas caras con una capa de plástico (casi imperceptible a primera vista). Busqué en muchos sitios, y esta fue la mejor oferta, pues otras opciones eran mucho más caras y tardaban semanas en llegar. Las compré para uso en microscopía óptica, para resaltar organismos y estructuras birrefringentes.

Nice one