◈ Optical design of SPOTLIGHT for broadcasting lighting and tool making of lens
product: SPOTLIGHT for broadcasting lighting
use: broadcasting lighting
The product we would like to introduce is SPOTLIGHT for broadcasting lighting. Broadcast lighting shall keep the value of color rendering and color temperature even with the application of lens as they is important, The SPOTLIGHT is designed with sift edge because it shall light not only concentrating into the actors but also fringe area.
◈ light source used
1. Beam Angle : deg. 120
2 . Luminous Flux : 29,000lm
◈ optic designing 1.Fresnel Lens designing
① NA=0.8 ② Size : Ø250mm ③ Surface : S1 Plano(Plane) / S2 Aspheric Fresnel 2. Spot simulation ① Beam angle : 15.158degree ② Efficiency : 36.74% ③ Illuminance : 17,900lx 3. Flood Simulation
①Beam angle : 48.66degree
② Efficiency : 49.38%
③ Illuminance : 2,900lx
◈ light distribution measurement of actual product Light distribution measurement was conducted in the client’s office after production of SPOTLIGHT applied with Fresnel lens which was supplied after tooling. The data is the result of measurement after mounting diffuser. The cause of different beam angle from optic design is supposed to be discretional adjustment of distance between lens and lighting source by the client..
. Light distribution of Spot 2. Light distribution of Flood