1W 3W 5W high power LED lens material types introduction
Material types of high-power LED lamp bead lenses
1. High-power LED lamp beads silicone lens
(1) Because of the high temperature resistance of silica gel (it can also be reflowed), it is often used to directly package on the LED lamp bead chip.
(2) Generally, the silicone lens is small in size, 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° (the thermal deformation temperature is 92 Spend).
High power LED lamp beads
3. High-power LED lamp beads PC lens
(1) Optical grade material Polycarbonate (referred to as PC) polycarbonate.
(2) Plastic materials, advantages: high production efficiency (can be completed by injection molding and extrusion); slightly lower light transmittance (about 89% when the thickness is 3mm); disadvantages: the temperature cannot exceed 110° (thermal deformation temperature 135 degrees).
4. High-power LED lamp bead glass lens
Optical glass material
Advantages: high light transmittance (97%), high temperature resistance;
Disadvantages: single shape, fragile, difficult to achieve mass production, low production efficiency, high cost. However, at present, very few domestic manufacturers have begun to develop glass molding processes, using molds to melt and cast glass lenses, which can produce lenses of 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 the replacement of optical plastic high-power LED lamp bead lenses sex products. However, the price of such production equipment is currently high, and it is difficult to popularize in the short term.
In addition, glass is more fragile than PMMA and PC materials, and more research and exploration are needed. For the improvement process that can be achieved now, the non-fragile properties of glass can only be improved by coating or tempering treatment. , the light transmittance of the glass lens will be reduced, but it will still be far greater than the light transmittance of ordinary optical plastic lenses. Therefore, the prospect of glass lens will be broader.
