4 Degree Fresnel Lens

Light source：CREE CXA1520
Flux：~1830 lm

Fig. 1 CREE CXA1520

Table 1：Simulation results

Lens diameter	Lens focal length	Beam Angle (Full)	Maximum Intensity	7m Maximum luminance (theoretical)
200mm	128mm	3.55°	219905.58Cd	4662.12Lux

Simulation:

LED flux: 1830lumen
Screen: 7m distance（distance between 2 walls inside a room）：

Fig. 2 200mm Fresnel Lens section dimensions

Fig. 3 200mm Fresnel Lens ray-tracing

(a)

(b)

(c)

(d)

(e)

(f)

Fig. 4 (a)~(f) 250mm Fresnel Lens Light pattern and illuminance analysis in 7 meters distance

(a)

(b)

(c)

(d)

(e)

Fig. 5 (a)~(e) 200mmFresnel Lens Far field light angle distribution