Home Aspheres & Cylinders DIOPTIC DNL Asphere Metrology using Diffractive Null Lenses

DIOPTIC DNL Asphere Metrology using Diffractive Null Lenses

Product Code:
DNL
Manufacturer: DIOPTIC

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

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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
Optional:
Focusing beams
Cat-eye beams

Lowest f-number f/0.9
Measuring accuracy <PV lambda/20 (lambda/40 with calibration
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