Off-Axis Parabolic Mirrors
Off-axis parabolic (OAP) mirrors are widely used in laser systems, spectroscopy, astronomy, and space optics where diffraction-limited focusing, unobstructed beam paths, and broadband reflective performance are required.
Avantier manufactures custom OAP mirrors in aluminum, nickel-plated aluminum, fused silica, Zerodur, ULE, and silicon carbide, supporting applications from compact infrared instruments to large-aperture spaceborne optical systems.
Key Capabilities Why Choose OAPs
- Apertures from 0.4 mm to 600 mm
- Aluminum, Zerodur, ULE, SiC
- Diamond Turning and Precision Polishing
- Surface Figure up to λ/40
- Custom Coatings for UV–LWIR
Applications Avantier Capabilities
- Spectroscopy
- Laser Systems
- Astronomy
- Space Optics
Stock Off-Axis Parabolic Mirrors
For rapid prototyping and laboratory applications, standard OAP mirrors are available in a range of focal lengths, apertures, and off-axis angles.
Protected Gold Off-Axis Parabolic Mirrors
| Part Number | Diameter (mm) | Off-set Angle | EFL (mm) | RMS | Surface Roughness | Substrate | Additional Hole |
|---|---|---|---|---|---|---|---|
| AVT-OAP-1111 | 25.4 | 90° | 25.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1211 | 25.4 | 90° | 50.8 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1311 | 25.4 | 90° | 76.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1411 | 25.4 | 90° | 101.6 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1611 | 25.4 | 90° | 152.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1811 | 25.4 | 90° | 203.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2211 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2212 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2311 | 50.8 | 90° | 76.2 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2411 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2412 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2611 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2612 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
Protected Silver Off-Axis Parabolic Mirrors
| Part Number | Diameter (mm) | Off-Set Angle | EFL (mm) | RMS | Surface Roughness | Substrate | Additional Hole |
|---|---|---|---|---|---|---|---|
| AVT-OAP-1121 | 25.4 | 90° | 25.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1221 | 25.4 | 90° | 50.8 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1321 | 25.4 | 90° | 76.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1421 | 25.4 | 90° | 101.6 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1621 | 25.4 | 90° | 152.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1821 | 25.4 | 90° | 203.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2221 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2222 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2321 | 50.8 | 90° | 76.2 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2421 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2422 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2621 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2622 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
Protected Aluminum Off-Axis Parabolic Mirrors
| Part Number | Diameter (mm) | Off-Set Angle | EFL (mm) | RMS | Surface Roughness | Substrate | Additional Hole |
|---|---|---|---|---|---|---|---|
| AVT-OAP-1131 | 25.4 | 90° | 25.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1231 | 25.4 | 90° | 50.8 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1331 | 25.4 | 90° | 76.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1431 | 25.4 | 90° | 101.6 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1631 | 25.4 | 90° | 152.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1831 | 25.4 | 90° | 203.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2231 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2331 | 50.8 | 90° | 76.2 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2431 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2631 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
UV-Enhanced Aluminum Off-Axis Parabolic Mirrors
| Part Number | Diameter (mm) | Off-Set Angle | EFL (mm) | RMS | Surface Roughness | Substrate | Additional Hole |
|---|---|---|---|---|---|---|---|
| AVT-OAP-1141 | 25.4 | 90° | 25.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1241 | 25.4 | 90° | 50.8 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1341 | 25.4 | 90° | 76.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1441 | 25.4 | 90° | 101.6 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1641 | 25.4 | 90° | 152.4 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-1841 | 25.4 | 90° | 203.2 | λ/4 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2241 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2242 | 50.8 | 90° | 50.8 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2341 | 50.8 | 90° | 76.2 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2441 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2442 | 50.8 | 90° | 101.6 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
| AVT-OAP-2641 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | N/A |
| AVT-OAP-2642 | 50.8 | 90° | 152.4 | λ/2 | 100Å | Aluminum 6061-T6 | with Ø3 mm Hole Parallel to Focused Beam |
Advanced Off-Axis Parabolic Mirrors - Gold
| Part Number | RoC | k | OAD | OAA (°) | D (mm) | CA | fp | fs | Best FitSphere | Departure to Sphere | Price (USD) MOQ 5 pcs | Price (USD) MOQ 10 pcs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OAP12-50-90-G | 50.000 | -1 | 50.000 | 90 | 12.7 | 11 | 25.000 | 50 | 106.158 | 0.198 | $270.00 | $235.00 |
| OAP25-50-90-G | 50.000 | -1 | 50.000 | 90 | 25.4 | 23 | 25.000 | 50 | 106.440 | 0.822 | $330.00 | $290.00 |
| OAP38-50-90-G | 50.000 | -1 | 50.000 | 90 | 38.1 | 34 | 25.000 | 50 | 106.924 | 1.911 | $385.00 | $350.00 |
| OAP12-100-30-G | 186.603 | -1 | 50.000 | 30 | 12.7 | 11 | 93.301 | 100 | 200.170 | 0.008 | $270.00 | $235.00 |
| OAP25-100-30-G | 186.603 | -1 | 50.000 | 30 | 25.4 | 23 | 93.301 | 100 | 200.322 | 0.031 | $330.00 | $290.00 |
| OAP38-100-30-G | 186.603 | -1 | 50.000 | 30 | 38.1 | 34 | 93.301 | 100 | 200.578 | 0.073 | $385.00 | $350.00 |
| OAP12-100-45-G | 170.711 | -1 | 70.711 | 45 | 12.7 | 11 | 85.355 | 100 | 200.678 | 0.018 | $270.00 | $235.00 |
| OAP25-100-45-G | 170.711 | -1 | 70.711 | 45 | 25.4 | 23 | 85.355 | 100 | 200.831 | 0.073 | $330.00 | $290.00 |
| OAP38-100-45-G | 170.711 | -1 | 70.711 | 45 | 38.1 | 34 | 85.355 | 100 | 201.090 | 0.169 | $385.00 | $250.00 |
| OAP50-100-45-G | 170.711 | -1 | 70.711 | 45 | 50.8 | 46 | 85.355 | 100 | 201.444 | 0.308 | $505.00 | $445.00 |
| OAP12-100-60-G | 150.000 | -1 | 86.603 | 60 | 12.7 | 11 | 75.000 | 100 | 202.123 | 0.034 | $270.00 | $235.00 |
| OAP25-100-60-G | 150.000 | -1 | 86.603 | 60 | 25.4 | 23 | 75.000 | 100 | 202.277 | 0.139 | $330.00 | $290.00 |
| OAP38-100-60-G | 150.000 | -1 | 86.603 | 60 | 38.1 | 34 | 75.000 | 100 | 202.538 | 0.321 | $385.00 | $350.00 |
| OAP50-100-60-G | 150.000 | -1 | 86.603 | 60 | 50.8 | 46 | 75.000 | 100 | 202.893 | 0.582 | $505.00 | $445.00 |
| OAP76-100-60-G | 150.000 | -1 | 86.603 | 60 | 76.2 | 69 | 75.000 | 100 | 203.930 | 1.360 | $695.00 | $640.00 |
| OAP12-100-90-G | 100.000 | -1 | 100.000 | 90 | 12.7 | 11 | 50.000 | 100 | 212.176 | 0.097 | $270.00 | $235.00 |
| OAP25-100-90-G | 100.000 | -1 | 100.000 | 90 | 25.4 | 23 | 50.000 | 100 | 212.316 | 0.396 | $330.00 | $290.00 |
| OAP38-100-90-G | 100.000 | -1 | 100.000 | 90 | 38.1 | 34 | 50.000 | 100 | 212.560 | 0.908 | $385.00 | $350.00 |
| OAP50-100-90-G | 100.000 | -1 | 100.000 | 90 | 50.8 | 46 | 50.000 | 100 | 212.880 | 1.644 | $505.00 | $445.00 |
| OAP76-100-90-G | 100.000 | -1 | 100.000 | 90 | 76.2 | 69 | 50.000 | 100 | 213.848 | 3.822 | $695.00 | $640.00 |
| OAP12-150-30-G | 279.904 | -1 | 75.000 | 30 | 12.7 | 11 | 139.952 | 150 | 300.214 | 0.005 | $270.00 | $235.00 |
| OAP25-150-30-G | 279.904 | -1 | 75.000 | 30 | 25.4 | 23 | 139.952 | 150 | 300.315 | 0.020 | $330.00 | $290.00 |
| OAP38-150-30-G | 279.904 | -1 | 75.000 | 30 | 38.1 | 34 | 139.952 | 150 | 300.485 | 0.047 | $385.00 | $350.00 |
| OAP50-150-30-G | 279.904 | -1 | 75.000 | 30 | 50.8 | 46 | 139.952 | 150 | 300.720 | 0.086 | $505.00 | $445.00 |
| OAP12-150-45-G | 256.066 | -1 | 106.066 | 45 | 12.7 | 11 | 128.033 | 150 | 300.974 | 0.012 | $270.00 | $235.00 |
| OAP25-150-45-G | 256.066 | -1 | 106.066 | 45 | 25.4 | 23 | 128.033 | 150 | 301.076 | 0.048 | $330.00 | $290.00 |
| OAP38-150-45-G | 256.066 | -1 | 106.066 | 45 | 38.1 | 34 | 128.033 | 150 | 301.249 | 0.110 | $385.00 | $350.00 |
| OAP50-150-45-G | 256.066 | -1 | 106.066 | 45 | 50.8 | 46 | 128.033 | 150 | 301.484 | 0.198 | $505.00 | $445.00 |
| OAP76-150-45-G | 256.066 | -1 | 106.066 | 45 | 76.2 | 69 | 128.033 | 150 | 302.173 | 0.462 | $695.00 | $640.00 |
| OAP12-150-60-G | 225.000 | -1 | 129.904 | 60 | 12.7 | 11 | 112.500 | 150 | 303.142 | 0.023 | $270.00 | $235.00 |
| OAP25-150-60-G | 225.000 | -1 | 129.904 | 60 | 25.4 | 23 | 112.500 | 150 | 303.244 | 0.092 | $330.00 | $290.00 |
| OAP38-150-60-G | 225.000 | -1 | 129.904 | 60 | 38.1 | 34 | 112.500 | 150 | 303.419 | 0.209 | $385.00 | $350.00 |
| OAP50-150-60-G | 225.000 | -1 | 129.904 | 60 | 50.8 | 46 | 112.500 | 150 | 303.654 | 0.377 | $505.00 | $445.00 |
| OAP76-150-60-G | 225.000 | -1 | 129.904 | 60 | 76.2 | 69 | 112.500 | 150 | 304.348 | 0.873 | $695.00 | $640.00 |
| OAP12-150-90-G | 150.000 | -1 | 150.000 | 90 | 12.7 | 11 | 75.000 | 150 | 318.227 | 0.064 | $270.00 | $235.00 |
| OAP25-150-90-G | 150.000 | -1 | 150.000 | 90 | 25.4 | 23 | 75.000 | 150 | 318.319 | 0.261 | $330.00 | $290.00 |
| OAP38-150-90-G | 150.000 | -1 | 150.000 | 90 | 38.1 | 34 | 75.000 | 150 | 318.483 | 0.594 | $385.00 | $350.00 |
| OAP50-150-90-G | 150.000 | -1 | 150.000 | 90 | 50.8 | 46 | 75.000 | 150 | 318.692 | 1.070 | $505.00 | $445.00 |
| OAP76-150-90-G | 150.000 | -1 | 150.000 | 90 | 76.2 | 69 | 75.000 | 150 | 319.339 | 2.465 | $695.00 | $640.00 |
| OAP12-200-30-G | 373.205 | -1 | 100.000 | 30 | 12.7 | 11 | 186.603 | 200 | 400.265 | 0.004 | $270.00 | $235.00 |
| OAP25-200-30-G | 373.205 | -1 | 100.000 | 30 | 25.4 | 23 | 186.603 | 200 | 400.341 | 0.015 | $330.00 | $290.00 |
| OAP38-200-30-G | 373.205 | -1 | 100.000 | 30 | 38.1 | 34 | 186.603 | 200 | 400.469 | 0.035 | $385.00 | $350.00 |
| OAP50-200-30-G | 373.205 | -1 | 100.000 | 30 | 50.8 | 46 | 186.603 | 200 | 400.644 | 0.063 | $505.00 | $445.00 |
| OAP76-200-30-G | 373.205 | -1 | 100.000 | 30 | 76.2 | 69 | 186.603 | 200 | 401.156 | 0.146 | $695.00 | $640.00 |
| OAP12-200-45-G | 341.421 | -1 | 141.421 | 45 | 12.7 | 11 | 170.711 | 200 | 401.279 | 0.009 | $290.00 | $250.44 |
| OAP25-200-45-G | 341.421 | -1 | 141.421 | 45 | 25.4 | 23 | 170.711 | 200 | 401.355 | 0.036 | $350.00 | $310.00 |
| OAP38-200-45-G | 341.421 | -1 | 141.421 | 45 | 38.1 | 34 | 170.711 | 200 | 401.485 | 0.081 | $405.00 | $370.00 |
| OAP50-200-45-G | 341.421 | -1 | 141.421 | 45 | 50.8 | 46 | 170.711 | 200 | 401.661 | 0.146 | $520.00 | $465.00 |
| OAP76-200-45-G | 341.421 | -1 | 141.421 | 45 | 76.2 | 69 | 170.711 | 200 | 402.178 | 0.337 | $715.00 | $655.00 |
| OAP12-200-60-G | 300.000 | -1 | 173.205 | 60 | 12.7 | 11 | 150.000 | 200 | 404.170 | 0.017 | $310.00 | $270.00 |
| OAP25-200-60-G | 300.000 | -1 | 173.205 | 60 | 25.4 | 23 | 150.000 | 200 | 404.246 | 0.068 | $370.00 | $330.00 |
| OAP38-200-60-G | 300.000 | -1 | 173.205 | 60 | 38.1 | 34 | 150.000 | 200 | 404.378 | 0.155 | $425.00 | $385.00 |
| OAP50-200-60-G | 300.000 | -1 | 173.205 | 60 | 50.8 | 46 | 150.000 | 200 | 404.552 | 0.279 | $540.00 | $485.00 |
| OAP76-200-60-G | 300.000 | -1 | 173.205 | 60 | 76.2 | 69 | 150.000 | 200 | 405.075 | 0.641 | $735.00 | $675.00 |
| OAP12-300-30-G | 559.808 | -1 | 150.000 | 30 | 12.7 | 11 | 279.904 | 300 | 600.377 | 0.002 | $330.00 | $290.00 |
| OAP25-300-30-G | 559.808 | -1 | 150.000 | 30 | 25.4 | 23 | 279.904 | 300 | 600.427 | 0.010 | $385.00 | $350.00 |
| OAP38-300-30-G | 559.808 | -1 | 150.000 | 30 | 38.1 | 34 | 279.904 | 300 | 600.513 | 0.023 | $445.00 | $405.00 |
| OAP50-300-30-G | 559.808 | -1 | 150.000 | 30 | 50.8 | 46 | 279.904 | 300 | 600.629 | 0.041 | $560.00 | $505.00 |
| OAP76-300-30-G | 559.808 | -1 | 150.000 | 30 | 76.2 | 69 | 279.904 | 300 | 600.971 | 0.094 | $755.00 | $695.00 |
Advanced Off-Axis Parabolic Mirrors - Aluminium
| Part Number | RoC | k | OAD | OAA (°) | D (mm) | CA | fp | fs | Best FitSphere | Departure to Sphere | Price (USD) MOQ 5 pcs | Price (USD) MOQ 10 pcs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OAP12-50-90-AL | 50.000 | -1 | 50.000 | 90 | 12.7 | 11 | 25.000 | 50 | 106.158 | 0.198 | $235.00 | $195.00 |
| OAP25-50-90-AL | 50.000 | -1 | 50.000 | 90 | 25.4 | 23 | 25.000 | 50 | 106.440 | 0.822 | $290.00 | $250.00 |
| OAP38-50-90-AL | 50.000 | -1 | 50.000 | 90 | 38.1 | 34 | 25.000 | 50 | 106.924 | 1.911 | $350.00 | $310.00 |
| OAP12-100-30-AL | 186.603 | -1 | 50.000 | 30 | 12.7 | 11 | 93.301 | 100 | 200.170 | 0.008 | $235.00 | $195.00 |
| OAP25-100-30-AL | 186.603 | -1 | 50.000 | 30 | 25.4 | 23 | 93.301 | 100 | 200.322 | 0.031 | $290.00 | $250.00 |
| OAP38-100-30-AL | 186.603 | -1 | 50.000 | 30 | 38.1 | 34 | 93.301 | 100 | 200.578 | 0.073 | $350.00 | $310.00 |
| OAP12-100-45-AL | 170.711 | -1 | 70.711 | 45 | 12.7 | 11 | 85.355 | 100 | 200.678 | 0.018 | $235.00 | $195.00 |
| OAP25-100-45-AL | 170.711 | -1 | 70.711 | 45 | 25.4 | 23 | 85.355 | 100 | 200.831 | 0.073 | $290.00 | $250.00 |
| OAP38-100-45-AL | 170.711 | -1 | 70.711 | 45 | 38.1 | 34 | 85.355 | 100 | 201.090 | 0.169 | $350.00 | $310.00 |
| OAP50-100-45-AL | 170.711 | -1 | 70.711 | 45 | 50.8 | 46 | 85.355 | 100 | 201.444 | 0.308 | $465.00 | $405.00 |
| OAP12-100-60-AL | 150.000 | -1 | 86.603 | 60 | 12.7 | 11 | 75.000 | 100 | 202.123 | 0.034 | $235.00 | $195.00 |
| OAP25-100-60-AL | 150.000 | -1 | 86.603 | 60 | 25.4 | 23 | 75.000 | 100 | 202.277 | 0.139 | $290.00 | $250.00 |
| OAP38-100-60-AL | 150.000 | -1 | 86.603 | 60 | 38.1 | 34 | 75.000 | 100 | 202.538 | 0.321 | $350.00 | $310.00 |
| OAP50-100-60-AL | 150.000 | -1 | 86.603 | 60 | 50.8 | 46 | 75.000 | 100 | 202.893 | 0.582 | $465.00 | $405.00 |
| OAP76-100-60-AL | 150.000 | -1 | 86.603 | 60 | 76.2 | 69 | 75.000 | 100 | 203.930 | 1.360 | $655.00 | $600.00 |
| OAP12-100-90-AL | 100.000 | -1 | 100.000 | 90 | 12.7 | 11 | 50.000 | 100 | 212.176 | 0.097 | $235.00 | $195.00 |
| OAP25-100-90-AL | 100.000 | -1 | 100.000 | 90 | 25.4 | 23 | 50.000 | 100 | 212.316 | 0.396 | $290.00 | $250.00 |
| OAP38-100-90-AL | 100.000 | -1 | 100.000 | 90 | 38.1 | 34 | 50.000 | 100 | 212.560 | 0.908 | $350.00 | $310.00 |
| OAP50-100-90-AL | 100.000 | -1 | 100.000 | 90 | 50.8 | 46 | 50.000 | 100 | 212.880 | 1.644 | $465.00 | $405.00 |
| OAP76-100-90-AL | 100.000 | -1 | 100.000 | 90 | 76.2 | 69 | 50.000 | 100 | 213.848 | 3.822 | $655.00 | $600.00 |
| OAP12-150-30-AL | 279.904 | -1 | 75.000 | 30 | 12.7 | 11 | 139.952 | 150 | 300.214 | 0.005 | $235.00 | $195.00 |
| OAP25-150-30-AL | 279.904 | -1 | 75.000 | 30 | 25.4 | 23 | 139.952 | 150 | 300.315 | 0.020 | $290.00 | $250.00 |
| OAP38-150-30-AL | 279.904 | -1 | 75.000 | 30 | 38.1 | 34 | 139.952 | 150 | 300.485 | 0.047 | $350.00 | $310.00 |
| OAP50-150-30-AL | 279.904 | -1 | 75.000 | 30 | 50.8 | 46 | 139.952 | 150 | 300.720 | 0.086 | $465.00 | $405.00 |
| OAP12-150-45-AL | 256.066 | -1 | 106.066 | 45 | 12.7 | 11 | 128.033 | 150 | 300.974 | 0.012 | $235.00 | $195.00 |
| OAP25-150-45-AL | 256.066 | -1 | 106.066 | 45 | 25.4 | 23 | 128.033 | 150 | 301.076 | 0.048 | $290.00 | $250.00 |
| OAP38-150-45-AL | 256.066 | -1 | 106.066 | 45 | 38.1 | 34 | 128.033 | 150 | 301.249 | 0.110 | $350.00 | $310.00 |
| OAP50-150-45-AL | 256.066 | -1 | 106.066 | 45 | 50.8 | 46 | 128.033 | 150 | 301.484 | 0.198 | $465.00 | $405.00 |
| OAP76-150-45-AL | 256.066 | -1 | 106.066 | 45 | 76.2 | 69 | 128.033 | 150 | 302.173 | 0.462 | $655.00 | $600.00 |
| OAP12-150-60-AL | 225.000 | -1 | 129.904 | 60 | 12.7 | 11 | 112.500 | 150 | 303.142 | 0.023 | $235.00 | $195.00 |
| OAP25-150-60-AL | 225.000 | -1 | 129.904 | 60 | 25.4 | 23 | 112.500 | 150 | 303.244 | 0.092 | $290.00 | $250.00 |
| OAP38-150-60-AL | 225.000 | -1 | 129.904 | 60 | 38.1 | 34 | 112.500 | 150 | 303.419 | 0.209 | $350.00 | $310.00 |
| OAP50-150-60-AL | 225.000 | -1 | 129.904 | 60 | 50.8 | 46 | 112.500 | 150 | 303.654 | 0.377 | $465.00 | $405.00 |
| OAP76-150-60-AL | 225.000 | -1 | 129.904 | 60 | 76.2 | 69 | 112.500 | 150 | 304.348 | 0.873 | $655.00 | $600.00 |
| OAP12-150-90-AL | 150.000 | -1 | 150.000 | 90 | 12.7 | 11 | 75.000 | 150 | 318.227 | 0.064 | $235.00 | $195.00 |
| OAP25-150-90-AL | 150.000 | -1 | 150.000 | 90 | 25.4 | 23 | 75.000 | 150 | 318.319 | 0.261 | $290.00 | $250.00 |
| OAP38-150-90-AL | 150.000 | -1 | 150.000 | 90 | 38.1 | 34 | 75.000 | 150 | 318.483 | 0.594 | $350.00 | $310.00 |
| OAP50-150-90-AL | 150.000 | -1 | 150.000 | 90 | 50.8 | 46 | 75.000 | 150 | 318.692 | 1.070 | $465.00 | $405.00 |
| OAP76-150-90-AL | 150.000 | -1 | 150.000 | 90 | 76.2 | 69 | 75.000 | 150 | 319.339 | 2.465 | $655.00 | $600.00 |
| OAP12-200-30-AL | 373.205 | -1 | 100.000 | 30 | 12.7 | 11 | 186.603 | 200 | 400.265 | 0.004 | $235.00 | $195.00 |
| OAP25-200-30-AL | 373.205 | -1 | 100.000 | 30 | 25.4 | 23 | 186.603 | 200 | 400.341 | 0.015 | $290.00 | $250.00 |
| OAP38-200-30-AL | 373.205 | -1 | 100.000 | 30 | 38.1 | 34 | 186.603 | 200 | 400.469 | 0.035 | $350.00 | $310.00 |
| OAP50-200-30-AL | 373.205 | -1 | 100.000 | 30 | 50.8 | 46 | 186.603 | 200 | 400.644 | 0.063 | $465.00 | $405.00 |
| OAP76-200-30-AL | 373.205 | -1 | 100.000 | 30 | 76.2 | 69 | 186.603 | 200 | 401.156 | 0.146 | $655.00 | $600.00 |
| OAP12-200-45-AL | 341.421 | -1 | 141.421 | 45 | 12.7 | 11 | 170.711 | 200 | 401.279 | 0.009 | $250.00 | $215.00 |
| OAP25-200-45-AL | 341.421 | -1 | 141.421 | 45 | 25.4 | 23 | 170.711 | 200 | 401.355 | 0.036 | $310.00 | $270.00 |
| OAP38-200-45-AL | 341.421 | -1 | 141.421 | 45 | 38.1 | 34 | 170.711 | 200 | 401.485 | 0.081 | $370.00 | $330.00 |
| OAP50-200-45-AL | 341.421 | -1 | 141.421 | 45 | 50.8 | 46 | 170.711 | 200 | 401.661 | 0.146 | $485.00 | $445.00 |
| OAP76-200-45-AL | 341.421 | -1 | 141.421 | 45 | 76.2 | 69 | 170.711 | 200 | 402.178 | 0.337 | $675.00 | $620.00 |
| OAP12-200-60-AL | 300.000 | -1 | 173.205 | 60 | 12.7 | 11 | 150.000 | 200 | 404.170 | 0.017 | $270.00 | $235.00 |
| OAP25-200-60-AL | 300.000 | -1 | 173.205 | 60 | 25.4 | 23 | 150.000 | 200 | 404.246 | 0.068 | $330.00 | $290.00 |
| OAP38-200-60-AL | 300.000 | -1 | 173.205 | 60 | 38.1 | 34 | 150.000 | 200 | 404.378 | 0.155 | $385.00 | $350.00 |
| OAP50-200-60-AL | 300.000 | -1 | 173.205 | 60 | 50.8 | 46 | 150.000 | 200 | 404.552 | 0.279 | $505.00 | $445.00 |
| OAP76-200-60-AL | 300.000 | -1 | 173.205 | 60 | 76.2 | 69 | 150.000 | 200 | 405.075 | 0.641 | $695.00 | $675.00 |
| OAP12-300-30-AL | 559.808 | -1 | 150.000 | 30 | 12.7 | 11 | 279.904 | 300 | 600.377 | 0.002 | $290.00 | $250.00 |
| OAP25-300-30-AL | 559.808 | -1 | 150.000 | 30 | 25.4 | 23 | 279.904 | 300 | 600.427 | 0.010 | $350.00 | $310.00 |
| OAP38-300-30-AL | 559.808 | -1 | 150.000 | 30 | 38.1 | 34 | 279.904 | 300 | 600.513 | 0.023 | $405.00 | $370.00 |
| OAP50-300-30-AL | 559.808 | -1 | 150.000 | 30 | 50.8 | 46 | 279.904 | 300 | 600.629 | 0.041 | $520.00 | $465.00 |
| OAP76-300-30-AL | 559.808 | -1 | 150.000 | 30 | 76.2 | 69 | 279.904 | 300 | 600.971 | 0.094 | $715.00 | $655.00 |
- Delivery time for Stock OAP mirrors: 4 + weeks
- Delivery time for advanced OAP mirrors: 5-7 weeks for 5-10pcs, 6-10weeks for 50 or more pcs
- Please note that prices are subject to fluctuation and may change without prior notice. For the most accurate and up-to-date pricing information, kindly contact our office. Additional shipping fees will be calculated and added to your total order.
- Also available in volume pricing, please contact Avantier for details.
Off-Axis Parabolic (OAP) Mirror Design Specifications
Custom OAP mirrors are typically specified by optical geometry, surface quality, substrate material, and coating requirements.
The most common design parameters are summarized below.
| Parameter | Description |
| EFL | Effective focal length |
| PFL | Parent focal length |
| OAA | Off-axis angle |
| OAD | Off-axis distance |
| CA | Clear aperture |
| Surface Figure | Surface accuracy |
| Surface Roughness | Surface finish quality |
| Slope Error | Local angular deviation |
| Material | Substrate material |
| Coating | Reflective coating |
Geometry of an Off-Axis Parabolic (OAP) Mirror
An off-axis parabolic (OAP) mirror is created by extracting a segment from a parent paraboloid at a specified distance from the optical axis. This geometry retains the aberration-free focusing and collimation properties of a parabola while eliminating central obscuration.
The geometry of an OAP mirror is typically defined by the following parameters:
Parent Focal Length (PFL)
Defines the focal length of the parent paraboloid.
Effective Focal Length (EFL)
Defines the focal length of the usable OAP segment.
Off-Axis Distance (OAD)
Defines the displacement from the parent optical axis.
Off-Axis Angle (OAA)
Defines the angular offset from the parent optical axis.
Clear Aperture (CA)
Defines the usable optical area of the mirror.
Together, these parameters determine the optical performance, packaging flexibility, manufacturability, and overall cost of a custom OAP mirror.
The diagram below shows the basic geometry of the off-axis parabola mirror.
Geometric Relationships
For a parent paraboloid with radius of curvature (RoC), the primary geometric parameters can be approximated by:
where:
- fpf_pfp = Parent focal length
- fsf_sfs = Segment focal length
- roffr_{off}roff = Off-axis distance
- θ\thetaθ = Off-axis angle
Custom Manufacturing Capabilities
Avantier manufactures custom off-axis parabolic (OAP) mirrors for applications ranging from spectroscopy and laser systems to astronomy and space optics.
Available Materials
Common substrate materials include aluminum, fused silica, Zerodur, ULE glass, and silicon carbide (SiC).
| Material | Thermal Stability | Lightweighting Potential | Relative Cost | Typical Application |
| Aluminum | Low | Excellent | Low | IR Systems |
| Electroless Nickel-Plated Aluminum | Medium | Excellent | Low-Mid | Precision IR Optics, Laser Systems |
| Fused Silica | Good | Moderate | Mid | Visible Imaging |
| Zerodur | Excellent | Moderate | Mid-High | Astronomy |
| ULE Glass | Excellent | Moderate | Mid-High | Space Telescopes, Ultra-Stable Imaging |
| SiC | Excellent | Excellent | High | Space Optics |
Material selection depends on wavelength, thermal stability, weight, and environmental requirements.
Surface Quality
| Parameter | Typical Capability |
| Surface Figure Error | λ/4 to λ/40 PV |
| Surface Roughness | <10 nm to <1 nm Ra |
| Slope Error | <10 µrad to <1 µrad |
Manufacturing Technologies
| Process | Typical Materials | Typical Applications |
| Diamond Turning | Aluminum, NiP Aluminum | IR Systems |
| Precision Polishing | Fused Silica, Zerodur, ULE | Visible Imaging |
| MRF | Glass & Ceramics | Figure Correction |
| IBF | Space Optics | Ultra-Precision Finishing |
Metrology and Verification
Typical metrology methods include:- Interferometry
- Computer Generated Hologram (CGH)
- Deflectometry
- Optical Profilometry
Reflective Coatings
| Coating | Spectral Range |
| Protected Aluminum | UV–NIR |
| Protected Silver | Visible–NIR |
| Enhanced Silver | Visible–NIR |
| Gold | IR |
| Enhanced Gold | MWIR–LWIR |
Mechanical Options
- Wedge and Non-Wedge Designs
- Precision Mounting Holes
- Alignment Flats
- Datum Surfaces
- Lightweighted Structures
- Custom Mounting Interfaces
Application-Specific Design Examples
Terahertz and Infrared Spectroscopy
Large-aperture OAP mirrors are commonly used in THz and infrared spectroscopy systems where optical throughput and thermal stability are critical.
| Parameter | Value |
| Clear Aperture | 300 mm |
| Material | Zerodur |
| Surface Figure | λ/6 PV @ 633 nm |
| Coating | Dielectric |
| Off-Axis Angle | 40° |
Astronomical and Scientific Imaging
OAP mirrors enable unobstructed optical paths and high image contrast for astronomical instruments and scientific imaging systems.| Parameter | Value |
| Clear Aperture | 400 mm |
| Material | Fused Silica |
| Surface Figure | λ/8 RMS @ 633 nm |
| Coating | Protected Silver |
| Off-Axis Angle | 30 ° |
Spaceborne Optical Systems
Space optical payloads often utilize lightweight, thermally stable OAP mirrors to maintain performance under launch and on-orbit conditions.| Parameter | Value |
| Clear Aperture | 150mm |
| Material | Silicon Carbide (SiC) |
| Surface Figure | λ/20 PV @ 633 nm |
| Coating | Protected Silver |
| Off-Axis Angle | 30° |
Frequently Asked Questions
Why are OAP mirrors more expensive than spherical mirrors?
OAP mirrors require more complex fabrication and metrology processes. Cost is typically influenced by aperture size, off-axis geometry, surface accuracy, material selection, and coating requirements.Which material should I choose for my OAP mirror?
Material selection depends on wavelength, thermal stability requirements, and environmental conditions. Aluminum is commonly used for infrared systems, while Zerodur, ULE, and SiC are preferred for high-stability imaging and aerospace applications.What information is required for a quotation?
To expedite the quotation process, please provide the clear aperture, focal length, off-axis angle, material preference, surface accuracy requirement, and coating specification.Related Content
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