Universal Ultra Violet Dual Beam Recorder

The Universal Ultra Violet Dual Beam Recorder is a development of the well established NTE UV Laser Beam Recorder, the very first production proven DVD mastering system. The stationary optical path design is a feature of all NTE LBRs, but is a priciple which becomes even more important on a Dual Beam Recorder.

- First Time Buyers
An LBR that will master the entire CD and DVD family and beyond, including CD, CD-R, CD-RW, MD-MO, DVD, DVD-RAM, DVD-R, DVD-RW. A system with an Ultra Violet laser which guarantees the maximum performance to meet the challenge of new formats.

- Existing Dual Beam Users
Four years ago NTE proved its UV LBR to be safe, fast and stable. Over thirty production facilities world-wide have now taken advantage of the improved mastering performance and flexibility possible with a high resolution 351 nm laser. The stability of a stationary optical path coupled with the patented Nimbus translation system gives you unrivalled track pitch stability, typically +/- 6 nm, almost five times better than the DVD specification.

Two identical optical paths with the ability to modulate and deflect both beams independently makes switching between formats easy, and allows a wide choice of writing strategy. Spot spacing can be controlled directly without deflector DC offsets, again improving stability.

- R&D Companies
The translation system used on all NTE CD and DVD Recorders has been further refined for the Universal Ultra Violet Dual Beam Recorder. The air-bearing system has been designed with enough performance to ensure that it can support future optical disc formats to the limits of laser beam based recording. The large internally damped optical bench offers enormous flexibility for incorporating additional components for mastering future formats and ensures easy access for upgrade purposes.

- Additional Features:
Camera image allows direct control of spot spacing
Mounts that are large, flexible and stable giving R&D precision in a production machine
Three AOMs, one for total power and one in each beam (EOMs are optional in one or both beams)


- Features Summary
Rotational Drive System
Mode CLV or CAV (may be slaved to formatter)
Direction CW or CCW
Speed 3 revs/sec to 60 revs/sec
Recording speed 4.7 GB DVD in < 1 hour at 50 MHz channel bit rate
Radial Drive System
Recording mode Inside to outside or outside to inside
Radius range 0 to 75 mm
Position repeatability +/- 5 Ám cut to cut
Track pitch range 0 to 4 Ám (set in increments of 1 nm)
Variation of average track pitch +/- 5 nm
Local track pitch variation < +/- 10 nm (+/- 6 nm typical)

- Optical System
Laser, Type Krypton ion, Coherent Innova 302
Wavelength 350.7 nm
Noise Suppression
Type Electro-optic modulator, feedback controlled
Bandwidth 3 MHz
Intensity Control
Type Acousto-optic modulator, feedback controlled
Range 0 - 8 mW
Control Mode Constant or Ramped
Minimum increment < 0.01 mW
Intensity constancy < 1% of set value
Beam split Continuously variable between the two beams
Modulation (each beam)
Type Acousto-optic modulator
Risetime < 8 nsec (10% - 90%)
Spot Size Control (each beam)
Method Continuously variable magnification and/or aperture stop (each beam)
Range of NA 0.3 - 0.9
Spot Size Range 340 - 800 nm (feature size may be smaller than spot)
Filling Rim intensity \063 60% (at max. NA)
Deflection (standard in first beam, optional in second beam)
Type Electro-optic deflector
Range +/- 500 nm standard
Settling time 500 nsec standard, 80 nsec with fast driver
Spot polarisation
Circular or linear
Objective Lens
NA = 0.9 Tropel or Pentax

- Focussing
Primary focus Red semiconductor laser, balanced skew beam system
Secondary focus Astigmatic system using reflected UV beam

- Monitoring
Spot monitor TV display using reflected UV light
Beam monitor Oscilloscope display of reflected UV beam profile, allows direct measurement of spot spacing.
Additional TV display of beam.

EOE monitor In incident beam, 50 MHz bandwidth (optional)

- Glass Master Specification
Normal glass size is 240 mm diameter by 6 mm thick. Centre boss optional.
Small diameter glass can be used if specified at the time of ordering.
Optional P2 Substrate

Resist-coated substrates with a centre hole of 15 mm (+0.1, - 0.0), an outer diameter of 120 mm and a thickness of 0.61 mm can be accommodated as an option.

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