Focusing elliptic Silicon substrate Lens FSL-D20
data sheet focusing aspheric substrate lens Focusing elliptic Silicon substrate Lens FSL-D20-f50 20 mm diameter, 50 mm focal length Elliptic focusing silicon lens material undoped HRFZ-silicon specific resistance >10 kcm refractive index n 3.4 diameter 20 mm focal length 50 mm height h 14 mm distance d 14.6 mm flat surface polished elliptic surface polished PCA chip thickness t 0.6 mm Terahertz beam focal length f 50 mm collection angle 52.7° convergence angle ß 10° Airy disc diameter at 300 GHz 3.6 mm at 1 THz 1.1 mm at 3 THz 0.36 mm optical beam THz beam t h d f Patent DE 10 2006 037470 A1 www.batop.de
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