Features
- 90° Off-Axis Parabolic Mirrors
- Diamond Turned Designs
- Protected Gold Coating Offers High Reflectance from 800 nm to 20 µm
- Excellent for Collimating a Point Source or Focusing a Collimated Beam
- Variety of Mounting Adapters Available
This Thorlabs' off-axis parabolic (OAP) mirror is diamond-turned, first-surface mirror that has been cut out of a parent parabolic mirror. By segmenting a full parabolic mirror, the resulting off-axis angled mirrors allow users to achromatically focus a collimated beam or collimate a point source. The angle at which the mirror focuses or collimates in relation to the incident beam is the off-axis angle. Thorlabs’ 90° off-axis parabolic mirrors, meaning that the incident beam is at a right angle to the reflected beam. The mirrors are fabricated from aluminum, and non-optical surfaces are black anodized. In addition, each item is engraved with the Item # for easy identification.
Specifications
- Substrate: Aluminum
- Off-Axis Angle: 90°
- Parent Focal Length Tolerance: ±1%
- Reflected Focal Length Tolerance: ±1%
- Clear Aperture: 90% of Diameter
- Surface Roughness: <100 Å RMS
- Surface Irregularity: λ/4 (@633 nm)
- Surface Quality: 40-20 Scratch-Dig
- Mounting Holes: 3x 4-40 Mounting Holes on Radial Pattern
- Manufacturing Process: Diamond Turned
- Reflectivity (Average): >95% from 400 nm to 20 µm
- Diameter: 25.4 mm
- Thickness: 31.7 mm
- Parent Focal Length: 25.4 mm
- Reflected Focal Length: 50.8 mm
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