Manufacturer's part #06 LGD 215, original unit price: $131.00. Design index is 1.600, design wavelength is 830nm, numerical aperture of 0.46, acceptance angle of 55 degrees, fractional pitch is 0.50. 10.54mm long. These gradiant-index lenses combine refraction at the plane end surfaces with continuous refraction within the rod. These are well suited to coupling the output of a diode laser into an optical fiber. Easily achievable aberration correction without complex multielement systems or aspherics. Reflection is reduced to less than 1.5% per surface with the Broadband AR coating. Unused. This is actually so small it comes in a pill capsule!
