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  • Toroidal Mirrors
Sep 2011
Optical Surfaces Ltd.Request Info
KENLEY, England, Sept. 1, 2011 — Optical Surfaces Ltd. is offering planoconvex and planoconcave toroidal mirrors for pinpoint focusing in spectroscopic and imaging applications.

These mirrors have two different radii whose axes are oriented at 90° to each other. They have advantages in applications where a beam must be focused and folded. Rather than requiring both a spherical and a plane mirror for this purpose, both functions are combined in one element. The lower number of optical elements increases energy throughput and enables more compact designs. Toroidal mirrors correct for the astigmatism that results when a spherical mirror is used off-axis.

The company produces custom toroidal mirrors in materials including zerodur, BK7 and fused silica, with typical surface accuracy of better than λ/5 (dependent upon size and radius) and surface quality of 20-10 scratch dig. They are available in a variety of shapes, with dimensions of up to 400 mm and durable optical coatings.

The mirrors are provided with a complete quality test assurance report.


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