Ball lenses are highly polished spheres made of optically transparent homogeneous materials. Carefully controlled manufacturing process produces spheres with precise diameters and unsurpassed surface quality.
Unlike cylindrical rod lenses made of optically transparent homogeneous materials, the GRIN rods have cylindrical distribution of refractive index around its axis and Luneburg-type refractive index profile.
When full angle fast axis beam divergence of laser diode exceeds 60 degrees, the best collimating lens type is high refractive index acylindrical plano-convex lens. The applications of those microlenses might call for shorter or longer working distance but no side lobes are present in either case. The stock of 12 mm long lenses is displayed. Other...
Plano-convex axicons have conical surface on one side and flat surface on the opposite side.