Difference between polarizer and backlight: I want to ask the difference between polarizer and backlight, because it is used for fishing. .

A polarizer is made according to the polarization principle of light. We know that when sunlight is projected on the road or water, it will directly stimulate the eyes, making them feel dizzy and tired, and they can't see clearly for a long time. Especially when you are driving a car and engaging in outdoor entertainment activities, it will not only affect our work and entertainment mood, but even affect our judgment of objects and images, resulting in danger; Long-term direct sunlight can also lead to a rapid decline in vision, resulting in myopia, hyperopia, astigmatism or cataract. The special function of polarizer is to effectively eliminate and filter the scattered light in the beam. So that light can be injected into the human visual image on the light transmission axis on the correct track, and the visual field is clear and natural. Like venetian blinds's principle, adjusting the light to the same direction and entering the room naturally makes the scenery look soft and not dazzling.

The reflector you are talking about is actually a polarizer (the way to distinguish a polarizer from ordinary sunglasses is to test it with special paper, and the difference is clear at a glance)