Diamond Turned Aspheric Mirrors0 pages

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Diamond Turned, Aspheric Mirrors
REO provides a range of diamond turned, aspheric mirrors suitable for a variety of
demanding infrared imaging applications. These mirrors can be produced in sizes up
to 12 inches (300 mm), with virtually any aspheric profile, including both rotationally
and non-rotationally symmetric (e.g. cylindrically aspheric and toroidal) curves, as well
as off-axis parabolas. They are fabricated from either aluminum or copper substrates.
REO’s state of the art testing and fabrication protocols ensure extremely accurate
figure (surface form) for these products, with sag deviation accuracies as low as
½ fringe.
These reflective optics are available with a choice of various metallic and dielectric
enhanced metallic coatings, such as gold, solderable gold, protected silver, aluminum
and enhanced aluminum. Furthermore, REO can produce these thin films using
traditional evaporative methods, as well as ion beam sputtering (IBS), the latter
technique generally delivering denser and more environmentally stable coatings. In addition, REO’s vertically integrated
fabrication capabilities, together with the company’s large coating capacity, enable them to support high production volumes
with industry leading cycle times.
Aspheric metal mirrors, and especially off-axis parabolas, are often used in infrared imaging and military target designation
systems typically operating in the mid-IR (3 – 5 µm) or thermal imaging (12 µm) bands. In these applications, they allow designers
to reduce total component count and diameter, thus offering savings in both cost and package size. Moreover, REO can readily
produce mechanical mounting features directly on the part that are registered to the optical surface with a high degree of
precision. Integrating mounting functionality within the part also helps reduces package size, and even enables these optics to
be dropped into assemblies with minimal additional optical alignment, thus further reducing production costs and cycle times for
the system integrator.

Typical Specifications
Shape Profiles

Spheres, aspheres, toroids, cylinders,
off axis conic sections

Substrate Materials

Al, Cu

Size Range

10 mm – 300 mm

Wavelength range

3 µm – 14 µm

Surface Accuracy (@ 632 nm)

λ/4

Clear Aperture

90%

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