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Detailed knowledge points related to lenses for LEDs
Release Time:
Sep 01,2024
Detailed knowledge points related to lenses for LEDs.
Detailed knowledge points related to lenses for LEDs
1, Silicone lens: because of the high temperature resistance of silicone, so commonly used directly encapsulated in the LED chip. General silicone lens volume is small, diameter 3-10mm.
2, PMMA lens: optical PMMA (polymethyl methacrylate, commonly known as: acrylic), plastic materials, advantages: high production efficiency (can be completed through injection moulding, extrusion). High transmittance (3mm thickness when the penetration rate of 93% or so); disadvantages: the temperature can not exceed 80 ° (heat distortion temperature of 92 degrees).
3, PC lens: (optical grade material Polycarbonate (PC for short) polycarbonate. Plastic materials, advantages: high production efficiency (can be completed through injection moulding, extrusion); light transmission rate is slightly lower (3mm thickness penetration rate of 89% or so); disadvantages: the temperature can not exceed 110 ° (heat distortion temperature of 135 degrees).
4, Glass lens: optical glass materials, Advantages: high light transmission (3mm thickness penetration rate of 97%), temperature resistance and other characteristics; Disadvantages: large volume and quality of heavy, single shape, fragile, mass production is not easy to achieve, low production efficiency, high cost.
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