Singhal, A. K.; Singh, R. N.; Kandpal, T. C.; Mathur, S. S. - In: Applied Energy 11 (1982) 2, pp. 151-165
The concentration characteristics of an inverted [`]vee'-type Fresnel lens have been studied. The variation in lens transmittance with groove position for different slope angles is represented graphically, showing a better transmittance at higher slope angles. The distribution of the local...