Tailoring Stereomicroscope Magnification for Diverse Application Needs
The main function of the polarizing plate in a polarizing microscope is to convert natural light without polarization into polarized light, allowing light perpendicular to the electric field to pass through and enabling the LCD panel to display images normally. The main function of a polarizer is to convert natural light passing through it into polarized light. Polarizing film is a sheet-like optical functional material that generates and detects polarized light. Polarizing film is a key component that affects the display effect of LCD screens.
Polarizing plates are a type of product that polarizes natural light without polarization, converting it into polarized light. Combined with the twisting properties of liquid crystal molecules, they control the passage of light, thereby improving transmittance and viewing angle range, and forming anti glare functions. They are an important product in the upstream raw material field of panels and account for about 10% of the cost of LCDTV raw materials.
Polarizers classified by function: transmissive polarizers, reflective polarizers, semi transmissive and semi reflective polarizers, compensating polarizers
Polarizers are classified by staining method:
Iodine based polarizing film: It is easy to obtain high transmittance and high polarization optical properties, but its ability to withstand high temperature and high humidity is poor.
Dye based polarizing film: It is not easy to obtain high transmittance and high polarization optical properties, but it has good resistance to high temperature and high humidity
Composition of polarizing film
The earliest polarizing film was mainly composed of PVA film that can generate polarized light in the middle, and TAV protective film composite on both sides. In order to facilitate use and achieve different optical effects, polarizer suppliers should meet the requirements of LCD display manufacturers, and apply pressure-sensitive adhesive on both sides, followed by a release film. This type of polarizer is the most commonly used TN ordinary full transmission polarizer. If one layer of release film is removed and another layer of reflective film is added, it will be a regular reflective polarizer.
The pressure-sensitive adhesive used is high-temperature and moisture-proof pressure-sensitive adhesive, and PVA is subjected to special impregnation treatment (dye series products), resulting in a wide temperature type polarizer; Adding components that prevent ultraviolet rays from passing through the pressure-sensitive adhesive used can produce UV resistant polarizing films; By compounding a birefringent optical compensation film on the transmission substrate, a polarizing film for STN can be made; A wide angle polarizer or narrow angle polarizer can be made by compounding a light turning film on the transmitted original film; Coloring the pressure-sensitive adhesive, PVA film or TAC film used is called colored polarizer. In fact, with the continuous development of new LCD display products, the types of polarizing films are also increasing.
