Ball Lens - 성경 포토닉스 Ball Lens Features Uniformly and Precisely Ground Excellent Surface Roughness Higher Sphericity (
Ball lens calculation for optical components The place to buy cutom and stock ball lenses including sapphire, knight optical, drum and ruby ball lenses. ... Ball Lens Calculations Effective Focal Length (EFL) of a ball lens: BFL=EFL-D/2 Where, EFL= nD/4(n-1) BFL is Back Focal Length n is refractive
