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Products Home / Optical Elements / Optical Mirrors / Off-Axis Parabolic Mirrors / Off-Axis Parabolic Mirrors, UV-Enhanced Aluminum Coating (250 - 450 nm)Off-Axis Parabolic Mirrors, UV-Enhanced Aluminum Coating (250 - 450 nm)
- UV-Enhanced Aluminum Coating for 250 - 450 nm
- Focus or Collimate Light without Spherical or Chromatic Aberrations
- SM-Threaded, Unthreaded, and Post-Mountable Adapters Provide
Flexible Mounting Options
MPD269-F01
Ø2", RFL = 6"
MPD129-F01
Ø1", RFL = 2"
MPD019-F01
Ø1/2", RFL = 1"
SM1MP
SM1-Threaded
Mounting Adapter
Ø2" Off-Axis Parabola in
a KS3 Mirror Mount with an
MP508P1 Mounting Adapter
Please Wait
Click to Enlarge
After initial fabrication, all of our off-axis parabolic mirrors are finished on our single-point diamond turning machine. Visit our Custom Mirrors tab for more information.
Click to Enlarge
Back View
Features
- >90% Average Reflectance from 250 - 450 nm
- Collimates a Divergent Source or Focuses a Collimated Beam without Spherical or Chromatic Aberrations
- Effective Focal Lengths from 15 mm (0.59") to 8" (203.2 mm)
- Surface Roughness: <100 Å (RMS)
- Clear Aperture: >90% of Diameter
- Three Kinds of Mounting Adapters for Ø1/2", Ø1", and Ø2" Versions:
- Externally SM-Threaded
- Unthreaded for Use in Mirror Mounts
- With 8-32 (M4) Taps for Post Mounting
- Right-Angle Kinematic Mount for 30 mm Cage Systems and Ø1" OAP Mirrors
Thorlabs' Off-Axis Parabolic (OAP) Mirrors are first-surface 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.
 Zemax Files |
|---|
| Click on the red Document icon next to the item numbers below to access the Zemax file download. Our entire Zemax Catalog is also available. |
The angle between the focused beam and the collimated beam (off-axis angle) is 90°. As shown to the left, the propagation axis of the collimated beam should be normal to the bottom of the substrate to achieve a proper focus. The diamond-turned parabolic surface has a UV-enhanced aluminum coating that provides >90% average reflectance from 250 - 450 nm (see the Graphs tab for a plot of the coating performance).
The OAP mirrors sold here are fabricated using aluminum substrates. The bottom of each mirror has three tapped mounting holes in a triangle pattern and an alignment hole for use with a mounting adapter (see the Mounting Adapters tab for more details). The non-optical surfaces are black-anodized and laser-engraved with the item number for easy identification.
| Off-Axis Parabolic Mirrors Selection Guidea | |||||
|---|---|---|---|---|---|
| Mirror Coating (See Graphs Tab for Reflectance) |
Wavelength Range |
 90° Off-Axis |
 15°, 30°, 45°, 60° Off-Axis |
 90°, Hole Parallel to Focused Beam |
 90°, Hole Parallel to Collimated Beam |
| UV-Enhanced Aluminum | 250 nm - 450 nm |  |
Customb | ||
| Protected Aluminum | 450 nm - 20 µm | |
|||
| Protected Silver | 450 nm - 20 µm | |
|
|
Customb |
| Protected Gold | 800 nm - 20 µm | |
|
|
|
| Unprotected Gold | 800 nm - 20 µm | |
Customb | |
|
- To view the product presentation for each of our stocked off-axis parabolic mirrors, click the blue check icon (
). - We can manufacture off-axis parabolic mirrors with a variety of coatings, features, and off-axis angles. To request a quote for a custom mirror, please contact Tech Support.
| Item # | Diametera | Thicknessa | Reflected Focal Lengtha | Parent Focal Lengtha | Reflected Wavefront Error | Bottom Mounting Holes |
|---|---|---|---|---|---|---|
| MPD00M9-F01 | 0.5" (12.7 mm) | 20.0 mm (0.79") | 15.0 mm (0.59") | 7.5 mm (0.30") | <λ/4 at 633 nm | 4-40 Taps in Radial Pattern (3 Places) |
| MPD019-F01 | 0.5" (12.7 mm) | 0.74" (18.8 mm) | 1" (25.4 mm) | 0.5" (12.7 mm) | ||
| MPD01M9-F01 | 0.5" (12.7 mm) | 20.0 mm (0.79") | 33.0 mm (1.3") | 16.5 mm (0.65") | ||
| MPD029-F01 | 0.5" (12.7 mm) | 0.74" (18.8 mm) | 2" (50.8 mm) | 1" (25.4 mm) | ||
| MPD039-F01 | 0.5" (12.7 mm) | 0.74" (18.8 mm) | 3" (76.2 mm) | 1.5" (38.1 mm) | ||
| MPD119-F01 | 1" (25.4 mm) | 1.25" (31.7 mm) | 1" (25.4 mm) | 0.5" (12.7 mm) | <λ/2 at 633 nm | |
| MPD129-F01 | 1" (25.4 mm) | 1.25" (31.7 mm) | 2" (50.8 mm) | 1" (25.4 mm) | <λ/4 at 633 nm | |
| MPD139-F01 | 1" (25.4 mm) | 1.25" (31.7 mm) | 3" (76.2 mm) | 1.5" (38.1 mm) | ||
| MPD149-F01 | 1" (25.4 mm) | 1.25" (31.8 mm) | 4" (101.6 mm) | 2" (50.8 mm) | ||
| MPD169-F01 | 1" (25.4 mm) | 1.25" (31.7 mm) | 6" (152.4 mm) | 3" (76.2 mm) | ||
| MPD189-F01 | 1" (25.4 mm) | 1.25" (31.7 mm) | 8" (203.2 mm) | 4" (101.6 mm) | ||
| MPD249-F01 | 2" (50.8 mm) | 2.47" (62.8 mm) | 4" (101.6 mm) | 2" (50.8 mm) | 8-32 Taps in Radial Pattern (3 Places) |
|
| MPD269-F01 | 2" (50.8 mm) | 2.47" (62.8 mm) | 6" (152.4 mm) | 3" (76.2 mm) |
| Common Specifications | ||
|---|---|---|
| Reflectance (Average) | >90% from 250 to 450 nm | |
| Off-Axis Angle | 90° | |
| Clear Aperture | >90% of Diametera | |
| Surface Roughness (RMS) | <100 Å | |
| Surface Quality | 40-20 Scratch-Dig | |
| Parent Focal Length Tolerance | ±1% | |
| Reflected Focal Length Tolerance | ±1% | |
| Substrate | Aluminum | |
| Manufacturing Process | Diamond Turned | |
The shaded regions in the graphs denotes the ranges over which we guarantee the specified reflectance. Please note that the reflectance outside of these bands is typical and can vary from lot to lot, especially in out-of-band regions where the reflectance is fluctuating or sloped.
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Mounting Adapter Installation
Mounting Adapters
The bottom of each off-axis parabolic mirror contains three tapped mounting holes in a triangle pattern and an alignment hole. These holes are used to attach our Mounting Adapters, which contain three corresponding counterbores and an alignment pin. Together, these features allow our OAP mirrors to be securely mounted. The tapped holes are also useful in OEM applications.
We offer three types of mounting plates. The first type is designed to be mounted in any Ø1", Ø2", or Ø3" mirror mount, depending upon the diameter of the OAP mirror. The second type, designed for post mounting, contains an 8-32 (M4) tapped hole on all four sides for direct mechanical compatibility with Ø1/2" Posts. The third type is externally SM threaded for direct compatibility with any of our internally SM-threaded components, such as our rotation mounts.
Our OAP mirrors can also be adapted to our SM threads by placing them into our SM Thread to Double Bore Adapters. This adapter allows rotation of the OAP mirror with respect to the adapter prior to securing its position, whereas when using the SM-threaded adapters offered on this page, the final location of the OAP mirror is dictated either by the threads themselves (when fully threaded into a mount) or by using the provided retaining ring to secure it in place.
We do not currently offer a mounting adapter for the Ø3" OAP mirror. However, it can be directly mounted in our KS3 Precision Kinematic Mirror Mount.
Selecting a Mirror Based on Desired Output Beam Diameter
When using an off-axis parabolic mirror to collimate a divergent source, selection of the appropriate mirror is often done based on the desired output beam diameter. Beam diameter can be calculated very easily using the divergence half-angle of the incident light (Θ) and the reflected focal length of the OAP mirror. To calculate the beam diameter in the small angle approximation, use the following equation:
Beam Diameter = 2 x sin(Θ) x Reflected Focal Length
If you are collimating from a fiber, the equation can be rewritten as:
Beam Diameter = 2 x NA (Fiber) x Reflected Focal Length
The table below lists the output beam diameter as a function of the reflected focal length of the mirror and the divergence half-angle of the incident light. Not listed here is the diameter of the OAP mirror. The clear aperture of the OAP mirror you select should be larger than the desired beam output diameter.
| Reflected Focal Length | Beam Diameter | |||
|---|---|---|---|---|
| 2.5° Source Divergence | 5° Source Divergence | 7.5° Source Divergence | 10° Source Divergence | |
| 0.59" (15.0 mm) | 1.3 mm | 2.6 mm | 3.9 mm | 5.2 mm |
| 1" (25.4 mm) | 2.2 mm | 4.4 mm | 6.6 mm | 8.8 mm |
| 1.3" (33.0 mm) | 2.9 mm | 5.8 mm | 8.6 mm | 11.5 mm |
| 2" (50.8 mm) | 4.4 mm | 8.9 mm | 13.3 mm | 17.6 mm |
| 3" (76.2 mm) | 6.6 mm | 13.3 mm | 19.9 mm | 26.5 mm |
| 4" (101.6 mm) | 8.9 mm | 17.7 mm | 26.5 mm | 35.4 mm |
| 5" (127.0 mm) | 11.1 mm | 22.1 mm | 33.2 mm | 44.1 mm |
| 6" (152.4 mm) | 13.3 mm | 26.6 mm | 39.8 mm | 52.9 mma |
| 8" (203.2 mm) | 17.7 mm | 35.4 mm | 53.0 mma | 70.6 mma |
| 9" (228.6 mm) | 19.9 mm | 39.8 mm | 59.7 mma | 79.4 mma,b |
Custom Off-Axis Parabolic (OAP) and Aspheric Mirrors
Key Capabilities
- Nanotech® 450UPL Ultra Precision 3-Axis CNC Diamond Turning Lathe for Individual Custom Mirrors
- Custom Sizes, Focal Lengths, Substrates, Coatings, and Clearance Holes
- Off- and On-Axis Parabolic, Conical, and Toroidal Mirrors
- Biconic Surfaces and Irregular Aspheric Optics
Thorlabs' advanced single-point diamond turning capabilities allow us to produce custom OAP and aspheric mirrors in small quantities. We can produce long focal length and large diameter optics, as well as optics with custom shapes.
Click to Enlarge
We offer OAP mirrors with custom sizes, focal lengths, substrates, coatings, and clearance holes.
In addition to our stock off-axis parabolic (OAP) mirrors, Thorlabs is also capable of manufacturing a variety of custom aspheric mirrors. Our unique single-point diamond turning (SPDT) capabilities allow us to produce these customs in low quantities at prices that are comparable with our stock offerings. As shown in the video to the right, we engage the slow-slide-servo process of our SPDT machine to polish individual off-axis mirrors by synchronizing the rotational position of the spindle with the linear position of the translation axes.
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Toroidal mirrors have two different radii of curvature and are used to image off-axis points without introducing astigmatism.
Click to Enlarge
Conical mirrors provide 360° of illumination.
This unique manufacturing capability allows us to provide OAP mirrors with custom reflected focal lengths and diameters, including long-focal-length and large-diameter optics that cannot be produced by conventional two-axis machining. In addition, we can produce OAP mirrors with a variety of custom substrates (including copper), custom coatings, and custom hole sizes and shapes. The use of copper substrates and other advanced techniques also allow us to offer OAP mirrors with enhanced finishes that exhibit less surface roughness than our our stock products, resulting in improved wavefront quality.
Our SPDT competency also enables us to produce mirrors with other custom biconic surfaces and aspheric shapes, including on-axis parabolic, conical, and toroidal mirrors. These custom mirror shapes can be used in a wide variety of optical instruments and specialized imaging systems. For example, toroidal mirrors, which are used to image off-axis points without introducing astigmatism, are commonly used in compact Czerny-Turner monochromators. Conical mirrors, on the other hand, are ideal for non-imaging applications that require 360° of uniform illumination.
We are generally able to produce custom OAP mirrors and aspheric mirrors with short lead times. For modifications to an existing part, delivery in 4-6 weeks is standard. For custom shapes and long focal length optics, a 6-8 week lead time is typical. To receive more information or a quote for a custom optic, please contact Tech Support.
Our engineers are available to help manufacture optics for your application.
Customs are available in low quantities at prices that are comparable with our stock catalog products.
Please contact techsupport@thorlabs.com with your custom optic requests.
| Posted Comments: | |
or
(posted 2019-01-04 12:46:52.15) Is Thorlabs able to manufacture 90-degree 100mm diameter off-axis parabolic mirrors with effective focal length of 200mm? If yes, how much would that cost? YLohia
(posted 2019-01-04 09:21:37.0) Hello, thank you for contacting Thorlabs. We have the ability to offer custom options on our OAPs. Please contact your local Thorlabs Tech Support team (europe@thorlabs.com) for a quote. |
Zoom| Item # | Diametera | RFLa | PFLa | Thicknessa | RWE | Mounting Featuresb |
|---|---|---|---|---|---|---|
| MPD00M9-F01 | 0.5" (12.7 mm) |
15.0 mm (0.59") | 7.5 mm (0.3") | 20.0 mm (0.79") | <λ/4 at 633 nm |
Three 4-40 Taps on Bottom |
| MPD019-F01 | 1" (25.4 mm) | 0.5" (12.7 mm) | 0.74" (18.8 mm) | |||
| MPD01M9-F01 | 33.0 mm (1.3") | 16.5 mm (0.65") | 20.0 mm (0.79") | |||
| MPD029-F01 | 2" (50.8 mm) | 1" (25.4 mm) | 0.74" (18.8 mm) | |||
| MPD039-F01 | 3" (76.2 mm) | 1.5" (38.1 mm) |
Click to Enlarge
Ø1/2" UV-Enhanced Aluminum OAP Mirror Threaded into a KC05-T SM05 Cage Mount using an SM05MP Adapter
Zoom| Item # | Diametera | RFLa | PFLa | Thicknessa | RWE | Mounting Featuresb |
|---|---|---|---|---|---|---|
| MPD119-F01 | 1" (25.4 mm) |
1" (25.4 mm) | 0.5" (12.7 mm) | 1.25" (31.7 mm) | <λ/2 at 633 nm | Three 4-40 Taps on Bottom |
| MPD129-F01 | 2" (50.8 mm) | 1" (25.4 mm) | <λ/4 at 633 nm | |||
| MPD139-F01 | 3" (76.2 mm) | 1.5" (38.1 mm) | ||||
| MPD149-F01 | 4" (101.6 mm) | 2" (50.8 mm) | ||||
| MPD169-F01 | 6" (152.4 mm) | 3" (76.2 mm) | ||||
| MPD189-F01 | 8" (203.2 mm) | 4" (101.6 mm) |
Zoom| Item # | Diametera | RFLa | PFLa | Thicknessa | RWE | Mounting Featuresb |
|---|---|---|---|---|---|---|
| MPD249-F01 | 2" (50.8 mm) |
4" (101.6 mm) | 2" (50.8 mm) | 2.47" (62.8 mm) | <λ/4 at 633 nm | Three 4-40 Taps on Bottom |
| MPD269-M01 | 6" (152.4 mm) | 3" (76.2 mm) |
Zoom
- Contains Three #4 Counterbores and an Alignment Pin for Mounting to OAP Mirrors
- SM05MP: Diameter is Externally SM05 Threaded
- MP127P1: Designed to Fit into Ø1" Mirror Mounts
- MP127P2(/M): Post Mountable in Four Orientations
Our Mounting Adapters for Ø1/2" Off-Axis Parabolic Mirrors provide mounting alternatives to our smooth bore kinematic mirror mounts. Each contains three #4 counterbores that are positioned to align with the 4-40 tapped holes on our Ø1/2" OAP mirrors. Three 4-40 cap screws and the required 3/32" hex key are provided with each adapter.
SM05MP
The SM05MP OAP Mirror Adapter is externally SM05 threaded (0.535"-40), which allows a Ø1/2" OAP mirror to be directly mounted to an internally SM05-threaded component. The adapter is designed to allow easy adaptability to a 16 mm cage system as well as SM05-threaded mirror, translation, and rotation mounts. The included SM05RR retaining ring secures the adapter in place when it is threaded into a mount. An SPW603 Spanner Wrench can be used to tighten the retaining ring against the OAP mirror housing.
MP127P1
The unthreaded MP127P1 OAP Mirror Adapter is sized to fit inside a Ø1" mirror mount, such as the KS1 Mirror Mount shown above.
MP127P2(/M)
The MP127P2(/M) OAP Mirror Adapter contains four 8-32 (M4) taps for post mounting that orient the OAP mirror at right angles. The distance from the center of the optic to the edge of the mount in the MP127P2 is 1/2" (12.5 mm), allowing for standardized optical axis heights when used with a fixed height post, such as our Ø1" Posts. Please note that the MP127P2(/M) is not compatible with Ø1" mirror mounts, and is instead designed for post mounting.
Zoom
- Contain Three #4 Counterbores and an Alignment Pin for Mounting OAP Mirrors
- SM1MP: Diameter is Externally SM1 Threaded
- MP254P1: Designed to Fit into Ø2" Mirror Mounts
- MP254P2(/M): Post Mountable in Four Orientations
- KCB1P(/M): Right-Angle Kinematic Mount
Our Kinematic Right-Angle Mount and Mounting Adapters for Ø1" Off-Axis Parabolic Mirrors provide mounting alternatives to our smooth bore kinematic mirror mounts. Each offers three #4 counterbores that are positioned to align with the 4-40 tapped holes on our Ø1" OAP mirrors.
SM1MP
The SM1MP OAP Mirror Adapter is externally SM1 threaded (1.035"-40) which allows a Ø1" OAP mirror to be directly mounted to an internally SM1-threaded component. The adapter is designed to allow easy adaptability to a 30 mm cage system as well as SM1-threaded mirror, translation, and rotation mounts. The included SM1RR retaining ring secures the adapter in place when it is threaded into a mount. An SPW606 and a SPW909 or SPW801 Spanner Wrench can be used to thread the retaining ring and adapter, respectively. Three 4-40 cap screws and the required 0.05" hex key are provided with each adapter.
MP254P1
The unthreaded MP254P1 OAP Mirror Adapter is sized to fit inside a Ø2" mirror mount, such as the KS2 Mirror Mount shown above. Three 4-40 cap screws and the required 3/32" hex key are provided with each adapter.
MP254P2(/M)
The MP254P2(/M) OAP Mirror Adapter contains four 8-32 (M4) taps for post mounting that orient the OAP mirror at right angles. The distance from the center of the optic to the edge of the mount in the MP254P2 is 1" (25.4 mm), allowing for standardized optical axis heights when used with a fixed height post, such as our Ø1" Posts. Please note that the MP254P2(/M) is not compatible with Ø2" mirror mounts, and is instead designed for post mounting. Three 4-40 cap screws and the required 3/32" hex key are provided with each adapter.
Click to Enlarge
KCB1P Mount is Compatible with 30 mm Cage Systems and SM1 Lens Tubes
Click to Enlarge
KCB1P Mounting Plate and Housing Body Shown with Ø1" Off-Axis Parabolic Mirror
KCB1P(/M)
The KCB1P(/M) Right-Angle Kinematic Mount provides ±4° of pitch and yaw adjustment for a Ø1" off-axis parabolic (OAP) mirror mounted on a plate that positions the surface of the mirror at a 45° angle. The ports are SM1 threaded (1.035"-40) for compatibility with our SM1 Lens Tubes and each face has four Ø6 mm smooth bore holes for compatibility with the ER rods for our 30 mm Cage System. The top and bottom of the mount also offer 1/4"-20 (M6) mounting holes for compatibility with Ø1/2" and Ø1" Posts.
The rear-loading, removable mounting plate features our ball and V-groove design that allows it to be precisely kinematically positioned on the body of the mount. The rear-loading design ensures that the optic remains accessible even after the mount is fitted with cage rods or lens tubes.
For more information on KCB1P(/M) Mount, see the full web presentation.
Zoom
Click to Enlarge
Ø2" OAP Mirror with Hole Parallel to Focused Beam Mounted on a Ø1/2" Post
Using an MP508P2 Adapter
- Contains Three #8 Counterbores and an Alignment Pin for Mounting to OAP Mirrors
- SM2MP: Diameter is Externally SM2 Threaded
- MP508P1: Designed to Fit into Ø3" Mirror Mounts
- MP508P2(/M): Post Mountable in Four Orientations
Our Mounting Adapters for Ø2" Off-Axis Parabolic Mirrors provide mounting alternatives to our smooth bore kinematic mirror mounts. Each contains three #8 counterbores that are positioned to align with the 8-32 tapped holes on our Ø2" OAP Mirrors. Please note that these adapters will block the through holes on OAP Mirrors with holes parallel to the collimated beam. Our smooth bore mounting adapters can be used to mount these parts.
SM2MP
The SM2MP OAP Mirror Adapter is externally SM2 threaded (2.035"-40), which allows a Ø2" OAP mirror to be directly mounted to an internally SM2-threaded component. The adapter is designed to allow easy adaptability to a 60 mm cage system as well as SM2-threaded mirror, translation, and rotation mounts. The included SM2RR retaining ring secures the adapter in place when it is threaded into a mount. An SPW604 and SPW801 Spanner Wrench can be used to thread the retaining ring and adapter, respectively. Three low profile 8-32 cap screws and the required 5/64" hex key are provided with each adapter.
MP508P1
The unthreaded MP508P1 OAP Mirror Adapter is sized to fit inside a Ø3" mirror mount, such as the KS3 Mirror Mount shown above. Three standard 8-32 cap screws and the required 9/64" hex key are provided with each adapter.
MP508P2(/M)
The MP508P2(/M) OAP Mirror Adapter contains four 8-32 (M4) taps, for post mounting, that orient the OAP mirror at right angles. The distance from the center of the optic to the edge of the mount in the MP508P2 is 1.5" (38.1 mm), allowing for standardized optical axis heights when used with a fixed height post, such as our Ø1" Posts. Please note that the MP508P2(/M) is not compatible with Ø3" mirror mounts, and is instead designed for post mounting. Three standard 8-32 cap screws and the required 9/64" hex key are provided with each adapter.
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