Detailed introduction to polarizers for polarizing microscopes
The main function of the polarizing plate of a polarizing microscope is to convert non-polarized natural light into polarized light, allowing light perpendicular to the electric field to pass through, allowing the LCD panel to display images normally. The main function of the polarizer is to turn the natural light that passes through the polarizer into polarized light. Polarizer is a sheet-shaped optical functional material that generates and detects polarized light. Polarizer is a key component that affects the display effect of LCD screens.
Polarizing plates polarize natural light without polarity and convert it into polarized light. Together with the twisting characteristics of liquid crystal molecules, it controls whether the light passes through, thereby increasing the light transmittance and viewing angle range, and forming anti-glare and other functions. , is a very important type of product in the upstream raw material field of panels, and accounts for about 10% of LCDTV raw material costs.
Polarizers are classified by function: transmissive polarizer, reflective polarizer, semi-transmissive and semi-reflective polarizer, compensation polarizer
Polarizers are classified according to dyeing methods:
Iodine-based polarizer: It is easy to obtain optical properties of high transmittance and high polarization degree, but its ability to withstand high temperature and humidity is poor.
Dye-based polarizer: It is not easy to obtain the optical properties of high transmittance and high polarization degree, but it has good resistance to high temperature and humidity.
The composition of polarizer
The earliest polarizers were mainly composed of a PVA film that can produce polarized light in the middle, and then compounded with TAV protective films on both sides. In order to facilitate use and obtain different optical effects, polarizer suppliers, at the request of LCD manufacturers, coat both sides with pressure-sensitive adhesive and then cover them with a release film. This kind of polarizer is the TN ordinary polarizer I see most often. Totally transmission polarizer. If you remove a layer of release film and add a layer of reflective film, it will be the most common reflective polarizer.
The pressure-sensitive adhesive used is a high-temperature-resistant and moisture-proof pressure-sensitive adhesive, and the PVA is specially dipped (dye series products). The polarizer made is a wide-temperature polarizer; adding blocking agents to the pressure-sensitive adhesive used The components that allow ultraviolet rays to pass through can be made into anti-UV polarizers; by compounding a birefringent optical compensation film on the original transmission film, a polarizer for STN can be made; by compounding a light steering film on the original transmission film, it can be made It can become a wide viewing angle polarizer or a narrow viewing angle polarizer; color the pressure-sensitive adhesive, PVA film or TAC film used to form a color polarizer. In fact, with the continuous development of new LCD products, there are more and more types of polarizers.
