Off-Axis Parabolic (OAP) Mirrors
Description
Off-Axis Parabolic (OAP) Mirrors are mirrors whose reflective surfaces are segments of a parent paraboloid. They achromatically focus a collimated beam or collimate a divergent source, and their off-axis design separates the focal point from the rest of the beam path. The reflective design eliminates phase delays and absorption losses introduced by transmissive optics.
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Off-Axis Parabolic (OAP) Mirrors
Specifications |
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|---|---|
| Reflective Coating: | Protected Aluminum, Protected Silver, Protected Gold, Custom |
| Substrate: | Metallic, Custom |
| Average Reflectance: | ＞85~98 % |
| Wavelength Range: | 400-10000nm |
| Surface Flatness: | 1 lambda, Custom |
| Surface Quality: | 40-20 scratch-dig, 60-40 scratch-dig, Custom |
| Diameter: | 400 mm |
| Thickness: | 1000 mm |
| Shape: | Custom |
| Coating 4 : | Bare Gold UV Enhanced Aluminum |
| Coating 3: | Protected Gold(700nm~2000nm) Ravg ＞96% @ 700 – 2000nm Ravg ＞96% @ 2000 – 10,000nm |
| Coating 2: | Protected Silver(450nm~2000nm) Ravg＞98%@450~2000nm, Ravg＞98%@2000~10,000nm |
| Coating 1: | Protected Aluminum(400-2000nm) Ravg＞85%@400~700nm, Ravg＞90%@400~2000nm |
| Off-Axis Angle: | 90° or customized |
| Non-optical Surface: | Black Anodized |
| Surface Roughness: | ≤8nm |
| Dimension: | 1”, 2”, 3”, 4”, large size up to 600mm |
| Through Holes: | With/Without Through Holes available |
| Material:: | Aluminum 6061-T |
Features
- Reflective Focal Length: the RFL of standard OAP is 1 inch, 2 inches, 4 inches and 6 inches.
- Off-axis angle: standard off-axis angle is 90°, others can be customized.
- Alignment Through Holes: standard OAP’s through holes diameter is 3mm. Through Hole orientation can be designed for parallel to focused beam or parallel to collimated beam.
- Surface roughness: <150 Å (RMS), customizable up to <20 Å (RMS)
Applications
- Target simulators
- Collimators
- MTF measuring systems and other optics test devices
- Spectroscopic and FTIR systems
- Radiometers
- Beam expanders
- Laser divergence measuring system
Use of off-axis optics allows optical engineers to achieve the following advantages
- Minimize system sizes
- Minimize system weight
- Both “wedged” and equi-thick mirrors are available
- Minimize system cost
For pricing, technical or any other questions please contact the supplier
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- No markups, no fees
- Direct contact with supplier
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How to order?
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Ships from:
China
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Sold by:
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On FindLight:
since 2021
Frequently Asked Questions
Off-Axis Parabolic (OAP) Mirrors are used to focus a collimated beam or collimate a divergent source in various applications such as target simulators, collimators, MTF measuring systems, spectroscopic and FTIR systems, radiometers, beam expanders, and laser divergence measuring systems.
The standard sizes available for the Reflective Focal Length (RFL) of OAP Mirrors are 1 inch, 2 inches, 4 inches, and 6 inches.
Yes, the off-axis angle of OAP Mirrors can be customized. The standard off-axis angle is 90°, but other angles can be designed according to the customer's requirements.
The surface roughness of OAP Mirrors is <150 Å (RMS), but it can be customized to be as low as <20 Å (RMS) according to the customer's needs.
The available coatings for OAP Mirrors are Protected Aluminum (400-2000nm), Protected Silver (450nm - 2000nm), Protected Gold (700nm - 2000nm), Bare Gold, and UV Enhanced Aluminum.