Product added to cart
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

31.75mm Sq., 2.5X, Protected Gold Off-Axis Ellipsoidal Mirror

Protected Gold Off-Axis Ellipsoidal Mirror

Stock #12-498 3-4 days
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
Qty 1-5
Qty 6+
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Get Product Downloads
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Aluminum 6061-T6
Surface Quality:
Surface Roughness (Angstroms):
<100 RMS
Protected Gold (700-10000nm)
Coating Specification:
Ravg >96% @ 700 - 2000nm
Ravg >96% @ 2000 - 10,000nm
Coating Type:
Dimensions (mm):
31.75 x 31.75
Off-Set Angle (°):
Off-Axis Ellipsoidal Mirror
Wavelength Range (nm):
700 - 10000
Y Offset (mm):
Image Distance (mm):
Object Distance (mm):

Regulatory Compliance

Certificate of Conformance:

Product Family Description

  • <100Å Surface Roughness for Low Scatter
  • Diamond Turned Alignment Surfaces
  • Ideal for Finite Conjugate Reflection

TECHSPEC® Off-Axis Ellipsoidal Mirrors are finite conjugate focusing mirrors used to image at a set angle. These mirrors feature fixed conjugate image and object path lengths, providing up to 2.5X magnification from the object plane to the imaging plane. Off-Axis Ellipsoidal Mirrors are commonly found in Fourier-transform infrared spectroscopy (FTIR) systems where broadband light sources require the use of metallic reflectors with an off-axis design to meet space constraints. TECHSPEC Off-Axis Ellipsoidal Mirrors feature a diamond turned cylindrical surface on their base, with a radius equivalent to the distance to the major axis of the ellipse, for aligning the mirror to the major axis as well as a diamond turned flat reference surface that is perpendicular to the major axis. Please contact us if your application requires an Off-Axis Ellipsoidal Mirror with custom specifications.