Optical Lenses

The lens we choose transforms the way we look at the things!

                                                     – Dewitt Jones.

Lenses are used for Imaging, Focusing, Expansion or Collimation of a Laser beam or as a Natural or artificial light, Pulsed light sources.

Spherical Lenses

         Most of the lenses are spherical in nature: the two surfaces of the lenses are parts of a sphere. Each surface can be convex (thin at the edge), concave (thick at the edge) or planar (flat). Combinations of two surfaces lead to various classes like Biconvex, Plano-Convex, Biconcave, Plano-Concave and Positive and Negative Meniscus (Convex-Concave). A spherical Lens does not form a perfect image.

Compound Lenses

        It is a collection of simple lenses of different shapes, made of different refractive index materials. Compound lenses are used for correction of spherical aberration, coma, chromatic aberration, field curvature, barrel, pincushion distortion, and astigmatism.

Cylindrical Lenses (Toric or Sphero-Cylindrical Lenses)

        These have surfaces with different radii of curvature in two orthogonal planes. Similar to astigmatic lens that are used to correct astigmatism in someone’s eye. Cylindrical lenses are best for focusing the light as a line.

        Optical lenses, which may consist of a single or multiple elements are used in a wide variety of applications from microscopy to laser processing. Optical lenses are being used by several scientific institutions and industries. As light passes through a lens, it is affected by lens’ geometrical and material profile. A Plano-Convex (PCX) or Double-Convex (DCX) lens causes light to focus to a point while a Plano-Concave (PCX) or Double- Concave (DCX) lens causes the light to diverge. Achromatic Lenses are ideal for applications requiring colour correction. Germanium (Ge), Silicon (Si), or CaF₂ lenses are ideal for transmitting the Infrared (IR) spectrum while Fused Silica is well suited for the Ultraviolet (UV). In a lens, the following parameter are usually used to declare as: diameter (ϕ), central thickness (T_c), radius (R), edge thickness (T_e), focal length (f), reflective index (n).

        We, SciEngTech Solutions provided these lenses with the material of N-BK7 and fused silica. We can also provide lenses with Ge, Si, ZnSe, CaF₂, and MgF₂ as per user’s requirement. We can provide uncoated as well AR coating for as UV-VIS (350-700 nm), MgF₂ (400-700 nm), VISIBLE (425-675 nm), VIS-NIR (400-1000 nm), NIR (500-1100 nm), IR (750-1550 nm) as per user’s requirement.