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Pick-up Head Wavefront Quality	SEARCH

Today’s CD, DVD and Blu-ray pickup heads are smaller than ever, with high numerical aperture values as well. 4D’s WaveCam dynamic laser interferometers are specifically designed to measure the wavefront quality of current and next-generation pickup heads, for reliable process and quality control.

Related Products WaveCam 4Sight Analysis Software

Related Articles Pickup Head Wavefront Quality Measurements No Point Reference Source Required for PUH Measurements Why M^2 is Not Enough to Characterize PUH Lasers Characterizing Pulsed Laser Wavefronts

More about 4D:
Measuring Adaptive Optics

Adaptive optics have traditionally been measured using Shack-Hartman wavefront sensors (SH). SH sensors divide the beam into sub-apertures and measure the average propagation direction of each sub-aperture. This method can achieve single shot measurement with rapid updates, yet it provides only coarse wavefront measurement since the number of sub-apertures is much less than the CCD resolution.

The WaveCam provides high spatial resolution phase measurement (approaching ...

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