1. High-power LED lamp beads silicone lens
(1) Because of the high temperature resistance of silica gel (reflow soldering is also possible), it is often used to directly encapsulate the LED chip.
(2) Generally, the size of silica gel lens is small, with a diameter of 3-10mm.
2. High-power LED lamp beads PMMA lens
(1) Optical grade PMMA (polymethyl methacrylate, commonly known as: acrylic).
(2) Plastic materials, advantages: high production efficiency (can be completed by injection molding and extrusion); high light transmittance (about 93% when the thickness is 3mm); disadvantages: the temperature cannot exceed 80° (heat distortion temperature 92 degree).
3. High-power LED lamp beads PC lens
(1) Optical grade material Polycarbonate (PC) polycarbonate.
(2) Plastic materials, advantages: high production efficiency (can be completed by injection molding or extrusion); light transmittance is slightly lower (the transmittance is about 89% when the thickness is 3mm); disadvantages: the temperature cannot exceed 110° (heat deformation temperature) 135 degrees).
4. High-power LED lamp bead glass lens
Optical glass materials, advantages: high light transmittance (97%), high temperature resistance, etc.; disadvantages: single shape, fragile, difficult to achieve mass production, low production efficiency, high cost, etc. However, at present, very few domestic manufacturers have begun to develop glass molding technology, using mold fusion casting to produce glass lenses, which can produce lenses with various shapes and special surfaces.
Molded production, good product consistency, high precision, and can improve production efficiency, effectively reduce the cost of glass lenses, coupled with the characteristics of high light transmittance, glass lenses are bound to become optical plastic high-power LED lamp bead lens replacement Sexual products. However, the current high price of such production equipment makes it difficult to popularize in the short term.
