Lens VS Reflector Which is the best secondary optics for LED illumination?

lens

The LED lens is divided into a primary lens and a secondary lens. The "lens" we generally refer to is a secondary lens, that is, a light source such as an LED lamp bead or a COB, and is closely combined with it. Different lenses can be used to achieve the desired optical effect, depending on the requirements.

The main material of the LED lens on the market today is PMMA, which has good plasticity and high light transmittance (up to 93%). The disadvantage is that the temperature resistance is relatively low, only about 90 degrees. The main secondary lens on the market is generally the internal total reflection design (TIR). The design of the lens is transparent in front of the lens, and the tapered surface can collect and reflect the side light. The overlapping of light can achieve perfect light utilization and beautiful spot effect. The TIR lens has an efficiency of more than 90% and is mainly used in small-angle lamps (beam angle <60°), such as spotlights and ceiling lamps.

Reflective cup

Usually, the LED light source has an illumination angle of about 120°. In order to achieve the desired optical effect, the lamp sometimes uses a reflector to control the illumination distance, the illumination area, and the spot effect.

Reflective cup material

Metal reflector: It needs to be stamped and polished, and has the memory of deformation. The advantage is low cost, temperature resistance, and it is often used for low-grade lighting requirements.

Plastic Reflector: One-time demoulding, high optical precision, invisible memory, moderate cost, often used in high-temperature lighting requirements for low-temperature lighting. And for export companies, plastic cups are easier to pass the safety regulations, aluminum cups are not easy to pass the safety regulations

Usually when the TV series is broadcast here, the music rings, and the ultimate problem of good guys and bad guys comes again: Which lens and reflector are better?

This is a mistake that has been wrong. First, you must first understand the requirements. What preconditions do you have and what kind of light effects do you need? If you go down, it is the realization of such a requirement. Which method is the most used? A good solution, sometimes even two, is more than just playing once.

Good optics are good as long as they achieve the desired optical effect. Suitable is the best secondary optics!