OPTICAL COMPONENTS Gradient Index Microlenses Spherical Lenses Cylindrical Lenses Lens Kits Cylindrical shape is easy to mount, easy to align Available with both plano and convex end profiles Available for popular visible and IR laser wavelengths Perfect solution for optical data transmission applications Also available with the focal plane falling outside the lens for non-contact use Achromatic Doublets Multi-Element Micro Optics Mirrors Prisms Substrates & Windows Optical glass with a refractive index gradient provides a very efficient and simple way to produce high quality imaging lenses. The material used in these microlenses is Selfoc®. This material has a radial index gradient which causes focusing to occur within the material. The index variation is defined by and is normally specified by the constant √ A. The simplest form of gradient index lens is a simple cylinder of Selfoc®. Collimated light incident on one end of the lens will be focused as it travels along the length of the cylinder. These microlenses are particularly useful for fiber and diode coupling since they can be mounted in close proximity to the source. They are ideal for use in optical data transmission. We offer gradient index microlenses with plano end faces and also in a convex configuration for greater imaging power. The convex lenses have a spherical radius on one end only. Normally these lenses are a quarter pitch so that they focus a collimated input at the remote face of the lens. However, we also offer lenses having slightly less than 1/4 pitch so that they focus just outside the lens. This is often more convenient since contact with the source or detector may be physically impossible. Two different numerical apertures are offered, 0.46 and 0.6. These lenses are wavelength specific. They are supplied for the wavelengths 633, 830, 1300 and 1560 nm and are Anti-Reflection coated for these wavelengths. They will work at other wavelengths but their focusing characteristics will vary from the published figures and the coatings will not be optimized. 1 pitch 1/4 pitch Beamsplitters Polarizers Filter & Apertures Specifications & Tolerances Diameter: ±0.02mm Length: +0, -0.04mm Parallelism: ≤10arcmin Index gradient: ±0.75% Clear aperture: 70% of diameter Material: Doped borosilicate glass Coating: NMAR V-coat LIGHT PATH THROUGH GRADIENT INDEX MATERIAL ORDERING & TECHNICAL SUPPORT www.optosigma.com focal point GRADIENT INDEX CONVEX MICROLENS

OPTICAL COMPONENTS Spherical Lenses Cylindrical Lenses Lens Kits Gradient Index Convex Microlenses Wavelength Range (nm) Refractive Index (axial) Index Constant PART NUMBER Achromatic Doublets Multi-Element Micro Optics Mirrors Prisms Substrates & Windows Beamsplitters Polarizers Filter & Apertures focal point GRADIENT INDEX PLANO MICROLENS Gradient Index Plano Microlenses Refractive Index (axial) Index Constant PART NUMBER Selfoc® is a registered trademark of Nippon Sheet Glass Company 106