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Calibration-Grade Lenses
Oct 2010
Edmund Optics Inc.Request Info
BARRINGTON, N.J., Oct. 14, 2010 — TechSpec calibration-grade precision aspheric lenses manufactured by Edmund Optics Inc. improve the efficiency of low-light-level detection systems and provide good off-the-shelf performance.

The high-numerical-aperture polished lenses deliver aspheric surface accuracy of 0.25 µm rms and offer improved aspheric surface figure, surface quality and centering specifications over the company's regular precision aspheric lenses. The uncoated lenses are available in 25- and 50-mm diameters, with numerical apertures of 0.50 and 0.66, making them suited for integration into R&D as well as OEM applications, and for applications requiring a compact optical path, where space is at a premium.

The individually serialized lenses include a complete metrology data package. This test data package includes a surface profile performed on a precision Taylor Hobson Talysurf profilometer, an interferogram of the spherical surface, and tested values for diameter, center thickness and centration. Custom-designed calibration-grade precision aspheric lenses as well as coating requirements and volume pricing are available upon request.

The lenses are in-stock and available for immediate delivery.


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Not spherical; an optical element having one or more surfaces that are not spherical. The spherical surface of a lens may be slightly altered so as to reduce spherical aberration. Aspheric surfaces are frequently, but not necessarily, surfaces of revolution about the lens axis.
center thickness
The lens thickness measured at the optical axis.
In a perfectly centered lens, the mechanical axis (defined by the ground outside the diameter of the lens) is made to be exactly coincident with the optical axis (defined by a line through the centers of curvature of the optical surfaces).
A photographic or electronic recording of an optical interference pattern.
The science of measurement, particularly of lengths and angles.
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