Φ=diameter*H=height*F=focal length. Unit: millimeter (MM), please ask for the specification table when you purchase.
The optical glass plano-convex lenses in this link are rimless, the diameter is 4MM to 13MM range is optional Can be used for DIY spotlight lens, focusing flashlight, automobile lamps, and other lamps and lighting products supporting.
Transmittance: 95%
Refractive index: 1.474
Working Temperature:-50 to 450 degree Celsius
Material: high borosilicate glass
Angle of light output: adjustable angle (through the adjustment of the distance between the lens and the LED, you can get the actual spotlight angle)
Optical glass convex lens is suitable for LED spotlights, automobile lights, focusing flashlights, floodlights, explosion-proof lights, downlights, laser spotlights, sensors, optical instruments, floodlights and other lamps and lighting products. With high temperature resistance, explosion-proof, no aging, high strength, high transmittance. Light spot uniformity, no black hole, shadow, dark area. Can be used with a variety of high-power LED1W, 3W, 5W, 8W, 10W 15W 20W, 50W and other ultra-high-power LED products.