DIOPTIC DFNL Asphere Metrology using Diffractive Fizeau Null Lenses
Interferometric precision testing: Take advantage of DIOPTIC's know-how to increase your efficiency and save valuable time by using their diffractive Fizeau null lenses.
- Easy handling: measuring aspheres as easy as measuring spheres
- Compatible with standard interferometer bayonet mount
- With integrated Fizeau reference plane
- Measurement of the vertex radius of curvature with integrated cat-eye beam
- Plane surface for recalibration of the Fizeau plane
With patented DFNL measuring lenses (Diffractive Fizeau Null Lenses), DIOPTIC offer a consistently highly precise and user-friendly solution. In order to mount DIOPTIC DFNLs on an interferometer, they offer a bayonet mount for sizes 4 to 12 inches for all commonly used interferometers. There is therefore no need for a complex adjustment of a standard CGH relative to the interferometer. Application areas include the testing of precision optics in photography, video lenses, projection, as well as the testing of large optics in astronomy and of satellite optics.
Advantages of using DIOPTIC DFNLs:
- A DFNL replaces the normal combination of transmission sphere and CGH
- DFNLs are compatible with all Fizeau interferometers
- Simple handling thanks to integrated adjustment holograms
- High measurement precision and intrinsic error correction (Fizeau principle)
- Typical accuracy: lambda/10
- Short delivery times with the possibility for express service
- Testing of free-form surfaces is possible
- Testing of aspheric diffractive optics possible
Do you have special requirements? CGHs can be adjusted to your specific needs.
| Size of bayonet mount | 2" to 12" |
| Maximum active area | diameter <200mm |
| Integrated alignment features | Optional: cat-eye beams |
| Lowest f-number | f/0.9 |
| Measuring accuracy | <PV lambda/20 (lambda/40 with calibration |
DIOPTIC Computer Generated Holograms Brochure
Automatic inspection for surface imperfections: requirements, potentials and limits
DFNL type CGH with integrated Fizeau Reference Plane Whitepaper, Dr. Florian Hudelist
| Photo | Product | SKU | |
|---|---|---|---|
 | Opto Alignment QuickPRO-RPS™ | - | > |
 | Zygo VeriFire Asphere+ Interferometer | - | > |
 | Zygo Verifire IR Interferometers | - | > |
 | DIOPTIC DTS Diffractive Transmission Sphere | - | > |
 | DIOPTIC DTC Diffractive Transmission Cylinder | - | > |
 | DIOPTIC DNL Asphere Metrology using Diffractive Null Lenses | - | > |
