Gradient index microlens

cylindricalglasscollimator

Gradient Index (GRIN) lenses have a radially varying index of refraction and that causes an optical ray to follow a sinusoidal propagation path through the lens. Carefully designing the lenses for specific working distances GRIN lenses are easy to handle and integrate into optical systems. Typical applications include coupling the output of diode lasers into fibers, focusing laser light onto a detector, or collimating laser light. Hobbite offers 0.25 and 0.23 pitch GRIN lenses. 0.25 pitch lenses have 0 mm working distance and are best suited for beam colimating of optical fibers or laser diodes. Where the lenses can’t be directly contacted best option would be 0.23 pitch GRIN lenses, they have small working distance and are mainly used for focusing purpose. To reduce back reflections Hobbite offers lenses with one 8° wedged face and broad band AntiReflection coating. If required GRIN lens is not in the list of standard items, please submit request form for the lens you need. Material Oxide Glass Diameter tolerance +0.005/-0.010mm Effective diameter >70 % Thickness tolerance ± 2.5 % Angled surface tolerance ±2.5° Working distance tolerance ± 0.01 mm Surface quality 20-10 S-D Surface figure <λ/4 @ 632.8 nm Centration error <3 arcmin Protective chamfers 89 % @ 380 nm – 2000 nm (uncoated) Features: • Ideal for beam collimation or focusing • Laser to fiber coupling • Fiber to fiber coupling • Fiber to detector coupling • BBAR coating • Angled end surface reduces back reflections • Fiber to detector coupling • Low Insertion Loss • Improved Collimation • Drop-In Replacement for Lens