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Cylinder CGH
Computer-generated holograms for full aperture surface figure error and radius of curvature of cylinder optics
What is a Cylinder CGH?
A cylinder CGH (or computer-generated hologram) is a diffractive optical element that converts a collimated interferometer wavefront into a converging cylindrical wavefront. A range of concave and convex cylindrical optics can be measured in a confocal null test with the same CGH. Position convex cylindrical optics in the converging wavefront and concave cylindrical optics in the diverging wavefront.
Collimated input beam from interferometer
Cylinder CGH
Converging cylinder wavefronts (test convex cylinder optics here)
Line focus of CGH
Diverging cylinder wavefront (test concave optics here)
Technical Details
- Requires collimated input beam from interferometer
- Square or circular null pattern depending on size format
- Retro pattern for easy alignment to interferometer
- 633 nm operating wavelength
- Antireflection coated back surface for rejection of unwanted reflections
- Mechanical cell with stainless steel mounting balls to interface to AOM 6 degree-of-freedom alignment stages
Compatible Products
Standard cylinder CGHs are mounted in mechanical cells that interface directly to AOM FP3 and FP6 fine alignment stages. Detailed drawings and CAD models are available for all standard hardware on our Guide to Cylinder CGHs and on our resources pages.
We’ve Got a Cylinder CGH For You!
Our computer-generated holograms are available in a range of sizes and focal lengths to suit your application.
Not sure which CGH is right for your application? Read our tech memo, How to Choose the Right Cylinder CGH (also available in Chinese), or try out our interactive calculator.
2-Inch Cylinder CGHs
Compact and affordable for small cylindrical optics metrology.
- Substrate Size: 2″ x 2″ x 0.25″
- Null Pattern Size: 38 mm
- Null Pattern Shape: Square
- Cell size: 3-inch (C3 cell)
View 2-Inch Cylinder CGH Data Sheet
| Part Number | F/# | Focal Length (mm) |
|---|---|---|
| C2070S | 0.7 | 18.6 |
| C2100S | 1.0 | 32.9 |
| C2150S | 1.5 | 53.7 |
| C2200S | 2.0 | 73.6 |
| C2300S | 3.0 | 112.4 |
| C2400S | 4.0 | 150.8 |
| C2500S | 5.0 | 189 |
| C2600S | 6.0 | 227.2 |
| You can now purchase any of our 2-inch cylinder CGHs from the Edmund Optics catalog! | ||
3-Inch Cylinder CGHs
Standard computer-generated holograms in stock and ready to ship; well suited for commercial interferometers with standard 4-inch collimated output.
- Substrate Size: 3″ x 3″ x 0.25″
- Null Pattern Size: 60 mm
- Null Pattern Shape: Square
- Cell size: 3-inch (C3 cell)
View 3-Inch Cylinder CGH Datasheet
View 3-Inch Datasheet in Chinese
| Part Number | F/# | Focal Length (mm) |
|---|---|---|
| C3070S | 0.7 | 29.4 |
| C3090S | 0.9 | 44.9 |
| C3100S | 1.0 | 52 |
| C3150S | 1.5 | 84.9 |
| C3200S | 2.0 | 116.2 |
| C3300S | 3.0 | 177.5 |
| C3400S | 4.0 | 238.1 |
| C3500S | 5.0 | 298.5 |
| C3600S | 6.0 | 358.7 |
4-Inch Cylinder CGHs
Ideally suited for commercial interferometers with standard 4-inch collimated output.
- Substrate Size: 6″ x 6″ x 0.25″
- Null Pattern Size: 95 mm
- Null Pattern Shape: Circular
- Cell size: 6-inch (C6 cell)
| Part Number | F/# | Focal Length (mm) |
|---|---|---|
| C4075C | 0.75 | 53.1 |
| C4090C | 0.9 | 71.1 |
| C4100C | 1.0 | 82.3 |
| C4150C | 1.5 | 134.4 |
| C4160C | 1.6 | 144.4 |
| C4200C | 2.0 | 184 |
| C4300C | 3.0 | 281 |
| C4400C | 4.0 | 377 |
| C4500C | 5.0 | 472.6 |
| C4550C | 5.5 | 520.3 |
| C4600C | 6.0 | 568 |
6-Inch Cylinder CGHs
Larger format for greater coverage; requires 6-inch collimated interferometer input.
- Substrate Size: 6″ x 6″ x 0.25″
- Null Pattern Size: 140 mm
- Null Pattern Shape: Circular
- Cell size: 6-inch (C6 cell)
| Part Number | F/# | Focal Length (mm) |
|---|---|---|
| C6075C | 0.75 | 78.3 |
| C6100C | 1.0 | 121.2 |
| C6110C | 1.1 | 137.2 |
| C6150C | 1.5 | 198 |
| C6160C | 1.6 | 212.8 |
| C6260C | 2.6 | 357.2 |
| C6300C | 3.0 | 414.1 |
| C6500C | 5.0 | 696.5 |
| C6600C | 6.0 | 837.1 |
| C6650C | 6.5 | 907.3 |
Purchasing Options
AOM cylinder CGHs are offered through diverse purchasing avenues, including availability in the Edmund Optics catalog, direct in-stock shipping from us, custom order options, and inclusion within a complete metrology kit.
2-Inch Cylinder CGHs
2-inch cylinder holograms and compatible stages are available and ready to ship from Edmund Optics!
GET A CGH TODAY!
Did you know you can purchase AOM’s 2-inch cylinder CGHs and mounts from Edmund Optics?
3-Inch Cylinder CGHs
3-inch cylinder holograms are available and ready to ship from AOM. Inquire about a custom order if you prefer the 3-inch CGH mounted in a 6-inch cell.
You can also find our 3-inch CGHs featured in the AOM Cylinder CGH Kit!
- The Cylinder CGH Kit includes five standard 3-inch cylinder holograms, covering a range from f/0.7 to f/6.0, ensuring comprehensive coverage for various cylinder UUTs.
- Complete your metrology system with two CGH mounting and fine alignment stages, a customizable part holder fixture, magnetic mounting balls, and a sample cylinder lens.
- Enhance precision and efficiency in optics production with full aperture high-resolution measurements.
The precision of Computer-Generated Holograms with the flexibility of a Transmission Sphere – reach out today to secure your AOM Cylinder CGH Kit!
4 & 6-Inch Cylinder CGHs
4 and 6-inch holograms are available by custom order. We can also custom-design cylinder CGHs for test wavelengths other than 633 nm.
Request a quote today to learn more about acquiring a 4 or 6-inch cylinder CGH.
Not sure which CGH is right for your application? Read our tech memo, How to Choose the Right Cylinder CGH (also available in Chinese), or try out our interactive calculator.