Lenses

Lenses

Lenses are used to focus or disperse light through use of curved surfaces of a specific medium.  Typically lenses are made of glass but they can also be made other transparent materials like plastic or crystalline materials.  The first lenses were simple magnifying glasses that were used to read small text and through trial and error evolved into a primitive version of the reading glasses many of use today.  Applications for lenses are exceptionally diverse but the most common uses today are for Microscopy, Laser Machining, Sensing, Machine Vision, Satellite Imaging and Astronomy.  Some of the most common types include spherical lenses, aspherical lenses, achromatic lenses, cylindrical lenses, Fly-Eye lens, and anamorphic lenses.  If our extensive selection of catalog lenses do not meed your needs, please send us a request for a custom lens made to your specifications.

  • Spherical Lenses

    Description

    Spherical lenses are the most common lens type and OptoSigma offers many standard versions, including Bi-convex (positive lens) , Bi-concave (negative lens), Plano-concave, and Plano-convex in N-BK7 (and equivalents) or Fused Silica either AR coated or uncoated for your needs.  Other varieties, such as meniscus, are available on a custom basis and we offer other substrate materials as well.  Contact us for your semi-custom or custom needs.

  • Aspherical Lenses

    Description

    Aspheric lenses are formed using either CNC machining or molding using glass or plastic as the substrate.  These lenses have surface profiles such as hyperboloid, paraboloid, acylinder or other higher order surface profiles.  Aspheres are typically used to correct spherical aberration or to simplify the number of elements in a design or both. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

  • Achromatic Lenses

    Description

    Achromatic lenses, referred to as an achromat, are doublet lenses typically corrected for spherical and chromatic aberration at two wavelengths (red and blue).  Our catalog achromatic lenses are corrected at blue, green, and red.  OptoSigma offers achromatic spherical and achromatic cylinder lenses for use in the UV, Visible, and NIR wavelength ranges. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

  • Cylindrical Lenses

    Description

    Cylinder lenses are lenses with a finite radius of curvature in one axis and an infinite radius of curvature in the orthogonal axis.  If you think of a soup can cut in half from top to bottom, that will give you an idea of what a cylinder lens is.  Conventional spherical lens processing equipment cannot be used for manufacturing cylinder lenses and processing time is slower.  Typically, cylinder lenses are Plano on one side, but custom configurations are available. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

  • Fly-Eye Lenses

    Description

    A fly-eye or fly's-eye lens is actually a 2D array of tiny lenses, called lenslets, and are typically used in pairs to spatially transform light from a non-uniform to uniform irradiance distribution at an illumination plane.  It gets its name because the appearance is much like a fly's eye. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

  • Fresnel Lenses

    Description

    The Fresnel lens, as the name implies, was pioneered by Augustin-Jean Fresnel.  It is a series of concentric annular sections with curved profiles that, if extruded and connected to the neighboring section, would form the same curvature as a conventional lens.  The Fresnel lens is typically used in illumination applications, the most famous is in lighthouses along the ocean shore.  Fresnel lenses save space and weight compared to conventional lens, but are not suitable for imaging applications due to the discontinuities. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

  • Micro Lenses

    Description

    Micro Lenses, typically used to refer to lenses less than 1/2" (12.7mm) in size.  OptoSigma offers standard Plano-Convex, Plano-concave, bi-concave, and bi-convex lenses down to 1.5 mm diameters.  Micro Optics are used in a variety of applications, most common are for miniaturization of medical devices such as endoscopy and cathetors. We can also provide custom micro-lenses smaller than 1 mm as well as other designs, such as an achromat (doublet).

  • Rod Lenses

    Description

    Rod lens is a cylindrical lens with a geometrical form of a cylinder and has a polished mantle, while the two flat end surfaces may be ground. Rod Lenses can be used for collimating a divergent beam in one dimension or for focusing light to a line. Such lenses are ideal for rigid endoscopes, a type of medical instrument used by surgeons to view regions inside the body. Custom options - please contact our sales department sales@optosigma.com

  • Silicon Plano Convex Lens

    Description


  • IR Lenses

    Description

    Infrared (IR) Lenses are used for wavelengths beyond the visible spectrum, but some materials also transmit in the visible region.  Calcium Fluoride (CaF2) and sapphire are 2 such materials, but ZnSe also transmits in the upper visible (red) range which can facilitate alignment with a HeNe laser.  Germanium (Ge) and Silicon (Si) are opaque to all visible wavelengths, but is a popular materials for use out to 20 microns.  ZnSe is very popular for mid-wave IR (MIR) and far IR applications. OptoSigma provides a variety of IR Lenses made from the forementioned IR materials and they can be useful for applictaions such as thermal imaging, security, automotive, smart sensing, and more. As always, if you cannot find a standard product that meets your requirements, ask us to manufacutre a custom solution.

  • Axicons

    Description

    Axicons are cone-shaped optics, either convex or concave on one side and Plano on the other.  They are generally used to generate a non-diffractive Bessel beam with a fixed transverse distribution during propagation.  Axicons are typically used in the areas of Optical Coherence Tomography (OCT), optical tweezers, and laser eye surgery among others.  They can be used with other optics to generate various beam profiles. We also manufacture custom solutions in case one of our many standard lenses do not meet your requirements.

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