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Turn-key instrument enables pulsed or CW optical pickup head testing

Posted: 24 Feb 2005 ?? ?Print Version ?Bookmark and Share

Keywords:4d technology? blu-ray? dvd? cd pickup head? wavecam 1000?

4D Technology Corp. is rolling out a turn-key instrument to test the next generation of Blu-ray, DVD, and CD pickup heads. The company's WaveCam 1000 is a vibration-insensitive wavefront interferometer that uses the 4D technology with a patented single-frame dynamic achromatic phase sensor. The system also provides a usb 2.0 interface to cameras. It can acquire data at the rate of 30fps.

The WaveCam 1000 also touts multi-wavelength capability. All of its optics are coated and corrected for the three most common data storage wavelengths of 780nm, 650nm and 405nm. In use, the WaveCam 1000 measures intensity and phase, of collimated or divergent beams, operating with pulsed or CW (continuous wave) sources. Measurement data can be acquired in as little as 30?s.

The WaveCam 1000 also includes zoom imaging and turret mounting accessory optics. That makes it easier to change optics without re-alignment. With an internal reference laser, calibration can also be performed without a point-of-reference source.

PC software
Additionally, the unit uses an intuitive interface. Its software, dubbed 4Sight, offers a graphical display for measurement set-up and data analysis. The 4Sight executables support IDL, MatLab, CodeV, WYKO Vision, Excel spreadsheets, National Instruments' popular LabVIEW, as well as OptiCode, IntelliWave, and cut-and-paste operations.

The 4Sight software provides an open data file format, has 3D display and analysis options, and is equipped with multiple data masking options. You can use 4Sight to read and analyze data from almost any other commercial analysis package, too. You can even make and analyze movies of moving or changing parts. The software works with almost any phase shifting interferometer, as a standalone workstation, or with your 4D system.

Systems are priced from about $80,000 to $100,000, depending on options. Additional information can be found online.

- Alex Mendelsohn

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