Who can guide the difference between lens and reflective cup and the occasion of use?

Optical effects and application differences between lenses and reflective cups;

Generally, the lens has no side spots and beautiful light shape. Due to the TIR design, the light extraction efficiency is higher.

Lens is a spherical optical element made of transparent material. The lens consists of several lenses, including plastic lenses and glass lenses. Glass lenses are more expensive than plastic ones. General lens structures for cameras are: 1P, 2P, 1G 1P, 1G2P, 2G2P, 4G, etc. The more lenses, the higher the cost. Therefore, a good quality camera should use a glass lens, and its imaging effect is better than that of a plastic lens, which plays an important role in astronomy, military affairs, transportation, medicine, art and other fields.

The main material of LED lens is PMMA, which has good plasticity and high transmittance (up to 93%), but the disadvantage is that the temperature resistance is relatively low, only about 90 degrees. Secondary lenses are generally designed for total internal reflection (TIR). A penetrating condenser is designed in front of the lens, and the conical surface can collect and reflect all the side light. The superposition of these two kinds of light can get perfect light utilization and beautiful light spot effect. The efficiency of total internal reflection lens can reach more than 90%, which is mainly used for small angle lamps (beam angle

Reflective cup

Reflective cup refers to a reflector that uses a point bulb as the light source and needs long-distance spotlight illumination. It is usually cup-shaped, commonly known as reflective cup.

Generally, the luminous angle of LED light source is about 120. In order to achieve the ideal optical effect, lamps sometimes use reflectors to control the lighting distance, lighting area and spot effect.

Metal reflective cup: it needs stamping and polishing process, has deformation memory, has the advantages of low cost and temperature resistance, and is often used for low-grade lighting requirements.

Plastic reflective cup: one-time demoulding, high optical precision, invisible memory change, moderate cost, often used in high-grade lamps with low temperature.