DIOPTIC DNL Asphere Metrology using Diffractive Null Lenses
Diffractive null lenses (DNL) enable you to measure almost any surface geometry.
- For testing aspheres, toroids, free-form aspheres
- CGH fabricated on fused silica high precision substrates
- Easy adjustment in front of a Transmission Sphere using the mechanically compatible DNL-A4/-A6 opto-mechanics
DIOPTIC DNLs are ideal reference optics for measuring your aspheric or cylindric optical surfaces. Testing free-form surfaces is also no problem. By combining computer-generated holograms (CGH) with a spherical interferometer lens (transmission sphere, TS), almost every surface geometry and the entire performance of optical systems can be tested. DIOPTIC offer you testing lenses for spherical and aspheric metrology based on computer-generated holograms. DIOPTIC produce customer-specific diffractive null lenses (DNL) in standard mounts for all common interferometers.
DIOPTIC are experts for diffractive optics. Take advantage of their core compentence and long experience in this field.
Advantages of using our innovative DNLs:
- Typical accuracy: lambda/10
- Short delivery times with the possibility for express service
- Testing of free-form surfaces
- Testing of aspheric diffractive optics possible
| Maximum active CGH area | diameter <220mm |
| Integrated alignment features |
Tilt-alignment retro ring |
| Lowest f-number | f/0.9 |
| Measuring accuracy | <PV lambda/20 (lambda/40 with calibration |
DIOPTIC Computer Generated Holograms Brochure
DIOPTIC DNL Datasheet
Automatic inspection for surface imperfections: requirements, potentials and limits
| 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 DFNL Asphere Metrology using Diffractive Fizeau Null Lenses | - | > |
