Off-Axis Parabolic (OAP) Mirrors
Material:
Aluminum 6061-T
Surface Flatness:
<1 λ or customized
Off-Axis Angle:
90° or customized
Coating:
Protected Aluminum
Protected Silver
Protected Gold
Dimension:
1”, 2”, 3”, 4”, large size up to 600mm
Roughness:
≤8nm
Non-optical surface:
Black Anodized
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.
Blank OAP Mirrors |
Different Shape of OAP Mirrors |
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Material: Aluminum 6061-T6
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Dimensions
SZLASER provide the standard OAP with 1 inch(25.4mm), 2 inches(50.8mm), 3 inches(76.2mm), 4 inches(101.6). Large sizes can be up to 600mm
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Reflective Focal Length
The RFL of standard OAP is 1 inch, 2 inches, 4 inches and 6 inches.
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Off-axis angle
Standard off-axis angle is 90°, others can be customized.
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Coating
Protected Aluminum(400-2000nm)
Ravg >85% @ 400 – 700nm Ravg >90% @ 400 – 2000nm
Protected Silver(450nm – 2000nm)
Ravg >98% @ 450 – 2000nm Ravg >98% @ 2000 – 10,000nm
Protected Gold(700nm – 2000nm)
Ravg >96% @ 700 – 2000nm Ravg >96% @ 2000 – 10,000nm
Bare Gold, UV Enhanced Aluminum is also available. -
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)
Off axis parabolic mirror (OAP) is one of the common components to build terahertz and infrared light paths. Based on the principle of geometry paraboloid, off-axis mirror can focus the collimated beam / collimated THz wave with parallel incidence to the focus, and can also convert the terahertz wave or infrared light emitted by point light source into parallel transmission beam.
Main applications of off-axis parabolic mirrors are as follows:
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Target simulators
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Collimators
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MTF measuring systems and other optics test devices
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Spectroscopic and FTIR systems
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Radiometers
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Beam expanders
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Laser divergence measuring systems
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
wdt_ID P/N Diameter(mm) Parent Focal Length( ) Reflected Focal Length(mm) Coating
wdt_ID | P/N | Diameter(mm) | Parent Focal Length( ) | Reflected Focal Length(mm) | Coating |
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