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Off-Axis Parabolic Metal Mirrors are widely used in broadband UV, Visible, and IR applications. Unlike transmissive optics where the material properties greatly affect performance, off-axis parabolic mirrors (OAPs) are not wavelength dependent and therefore free of aberrations across a broadband range. These benefits make OAPs ideal for use in instrumentation and laser systems including Schlieren, MTF, FLIR, and FTIR, along with IR lasers such as Quantum cascade lasers. Off-axis parabolic mirrors allow for unrestricted access to the focal point allowing for compact system designs. Our Metal Substrate Mirrors are available in 15°, 30°, 45°, 60°, or 90° Off-Axis options with several coatings including Bare Gold and Enhanced Aluminum.
Figure 1: Example of FTIR (Fourier Transform InfraRed) Spectrometer Setup
✔ Surface Roughness Down to 50Å RMS
✔ Interferometrically Tested
✔ Solid Metal Design and No Adhesives for Best Thermal Conductivity
✔ Free of Chromatic and Spherical Aberration
✔ In-House Design, Manufacturing, and Coating Capabilities Available for Custom Requests
The wavelength range for Off-Axis Parabolic Mirrors are determined by the coating on the mirror. Currently there are three different coatings available: protected aluminum, protected gold, and bare gold, covering 400nm to more than 12000nm. The upper limit is set by the material property of the gold coating in combination with the gold thickness.
The design parameters required to make a cost efficient custom Off-Axis Parabolic Mirror are the reflected focal length, reflected angle, the tolerance for the focal point and the reflected wavefront distortion.
The design parameters required to make a cost efficient custom Ellipsoid Off-Axis Parabolic Mirror are the focal length of the two reflected beams, as well as the angle between them, along with the tolerance of one of the focal points, as well as transmitted wavefront distortion.