PRODUCTS
Cylinder CGHs
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 an 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 the Resources page.
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.
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)
| 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 |
GET A CGH TODAY!
Did you know you can purchase AOM’s 2-inch cylinder CGHs and mounts from Edmund Optics?