WFM

Wavefront measuring gauge


OEG
Optik
Elektronik
Gerätetechnik







Measuring of wavefront 2D/3D

 

-variable setup for varied specimen

-cost effective system solution

-motorized, software driven measuring procedure

-user friendly software


Measuring principle

 

The WFM is a scanning wavefront-measurement system. The wavefront, induced by the specimen is scanned by a motor driven pinhole.

The ilumination unit generates a spherical wave on the object side image plane  of the specimen.

The lens under test converts the spherical wave ideally to a plane wave in it's image plane.

A telescope with high resolution electronic image evaluation software detects the direction of ray in each measuring point. All measured ray directions aur used by the evaluation software to reconstruct the waveplane. In principle the waveplane can be measured in one section (2D) or in a lattice pattern (3D).

Depending on model (2D or 3D) the result is a 2D or 3D wavefrontdeformation related to a target value.

The complete measuring procedure is motorized and software driven.

The evaluation software offers several options for processing, presentation and saving of the achieved results.

 

 

The advantage of this equipment is it's variabillity. Lot of parameters can be adapted to fit the specimen options.

The main focus on development of WFM was a cost effective setup combined with a traceable measuring principle to get reliable results.

 





Technical data


Resolution of angle sensor: <0,1 arcsec

Accuracy of angle sensor: <1 arcsec

System accuracy of wavefront measurement: λ/10

Measuring field: 70mm (arbitrary expandable)

Telescope focal length available: 90 mm (140mm, 200mm, 300mm verfügbar)

Telescope aperture: 25mm

Telescope outer diameter: 40mm

CCD-Kamera: 440.000 Pixel, Megapixelcameras can be used

Motor control unit: PC-card with PCI interface with Joystick, 36000 steps/ rev

Objectgenerator: LED with high quality microobjective

Software:  32 Bit Windows-Software with integrated image evaluation algorithm

PC: Standard PC according current state of the art with 19“-Monitor


 



 

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OEG Gesellschaft für Optik, Elektronik & Gerätetechnik mbH · Wildbahn 8i · D-15236 Frankfurt · +49 (0)335 5213894 · +49 (0)335 5213896