What is optically transparent silicone?
Optically transparent silicone is a type of silicone material with special optical properties and physical and chemical properties
1. Features
High transparency: It has extremely high light transmittance. In the visible light range, the light transmittance can usually reach more than 90%, or even close to 95%, which allows light to pass almost unimpeded and ensures clear visual effects. For example, in LED packaging, it can ensure that light is efficiently transmitted.
Good optical stability: Under the influence of environmental factors such as long-term illumination, temperature changes and humidity, it can still maintain stable optical properties, and is not prone to yellowing and light transmittance reduction. Taking the optical silicone seal of outdoor display screens as an example, it can maintain good optical properties even if it is exposed to sunlight for a long time.
Excellent physical properties: It has good flexibility and elasticity, can adapt to a certain degree of deformation without breaking, can buffer external stress, and protect the encapsulated optical components. At the same time, it also has high tear strength and can withstand a certain amount of external force.
Strong chemical stability: It has good tolerance to chemical substances such as water, oxygen, acid and alkali, and is not easy to react chemically with other substances, ensuring stable operation in various chemical environments. For example, in a humid environment, it will not deteriorate due to water vapor erosion.
2. Application fields
LED field: It is used for the encapsulation of LED chips to protect the chips from the external environment and improve the light output efficiency and reliability. Its high transparency can reduce the loss of light during the encapsulation process, and its good thermal stability helps the LED to dissipate heat and extend its service life.
Optical display field: In the manufacture of liquid crystal displays (LCDs), organic light-emitting diode displays (OLEDs), etc., it is used for the bonding between touch screens and display screens, namely optical transparent adhesive (OCA), which can effectively reduce light reflection, improve display contrast and clarity, and enhance visual effects.
Optical lenses and optical instruments: It is used for the fixation and sealing of optical lenses and the bonding of internal components of optical instruments. Its high transparency and good physical properties can not only ensure that the optical performance of the lens is not affected, but also firmly fix the components to prevent dust and water vapor from entering, and ensure the stability and reliability of the instrument.