90° Off-Axis Parabolic Mirror, Gold Coating with a Silica Protective Layer: 800 nm - 20.0 μm OMO2050-G1-90
Off-axis parabolic mirrors use different sections of a paraboloid, each with a different off-axis angle. JCOPTIX 90° off-axis parabolic mirrors have gold coatings with silica protection for collimating or focusing beams. Excellent reflectance over 800 nm-20.0 μm supports near-to-far infrared use in FLIR, FTIR, and other IR systems. The silica layer protects gold from moisture-induced deterioration or peeling. Surface roughness is <100 Å. Diameters of 12.7 mm, 25.4 mm, and 50.8 mm correspond to reflected focal length ranges of 6.35-152.4 mm, 12.7-152.4 mm, and 50.8-203.2 mm. Note: the source describes metallic coatings as consumables prone to oxidation after prolonged air exposure or in humid, chemically corrosive atmospheres. For normal use and life: 1. Keep the environment clean and dry. 2. Wear gloves and avoid touching the mirror. 3. Avoid scuffs and scratches that accelerate oxidation and delamination. 4. Store unused mirrors sealed in the supplied protective box.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Outer Diameter | 50.8 mm |
| Thickness | 62.8 mm |
| Optical element material | Aluminum Substrate |
| Clear Aperture Dimension | 90% CA |
| Reflective Focal Length | 50.8 mm |
| Focal Length Tolerance | ± 1% |
| Parabolic Focal Length | 25.4 mm |
| Coating | Gold Coating with Silica Protective Layer |
| Operating Wavelength | 800 nm - 20.0 μm |
| Reflection R_avg | R_avg >96% |
| Off-Axis Angle | 90° |
| Surface quality (scratch/dig) | 40/20 |
| Surface Roughness | < 100 Å |
| Bottom threaded hole specification | M4 |
| Number of Bottom Tapped Holes | 3 |
| Reflected Wavefront Error [@633 nm] | λ/4 @ 633 nm |
Key Features
Datasheet
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