• DKBS - Bi-lateral slits
• DKGPIB - IEEE-488 communication interface (internal)
• DK2400 and Hand-held controllers for local control
• IR240 - Gold optics
• DK2PORT - Bifurcated fiber bundle for attaching 2 devices to 1 port.
• AB300 - Automated 6 position filter wheel

See options and accessories

• Connes to any computer via RS232 or IEEE-488.
• Motorized slits.
• Triple-grating turret allows high efficiency scanning across a broad speral range.
• May be faory configured as a mochromator or sperograph.
• Scans in both direions and with Constant Speral Resolution (CSR).
• Integrates with SP filter wheel for automatic filter switching.
• Suitable for fluorescence and absorption studies, deteor charaerization, thin film measurements, etc.

  Wavelength Seleion is Longer Expensive

  The Digikrom DK480 is a complete computer integrated solution. Easy to use commands control the triple grating turret, motorized slits, and optional motorized filter wheel for quick and easy sorting. Instrument mode can be set for constant speral resolution (CSR), where the slit width is automatically modified to compensate in the change in dispersion with wavelength to maintain constant speral bandp.

  Rugged cast construion, A-Thermal design, and SP dire grating drive make this unit the most repaetable and reliable in its cl. Each instrument is calibrated and certified prior to delivery.

  Feature Value

  Design:	Czerny-Turner. Triple-grating turret standard.
  Focal Length:	480mm
  f/#:	7.8
  Wavelength Drive:	Worm and wheel with computer control. Bi-direional.
  Wavelength Precision and Reproducibility:	0.007nm (with 1200g/mm grating)
  Wavelength Accuracy:	&plun; 0.3 nm standard (with 1200 g/mm grating)
  Scan Speed:	1 to 1200nm/minute (with 1200g.mm grating)
  Stray Light:	< 0.01% at 220nm (Nal)
  Slits:	Unilateral, computer controlled, curved entrance and straight exit standard. Width - 10μm to 3000μm Height - 2mm to 20mm
  Reciprocal Dispersion:	1.60nm/mm (with 1200 g/mm grating)
  Max Resolution:	0.03nm (with 1200 g/mm grating)
  Gratings:	One to three gratings (68 x 68mm standard, 68 x 84mm optional) must be purchased. See Appendix A for options.
  Software:	Demonstration control program and LabView driver included.
  Power:	100 - 240V, 50/60Hz, 60W 220/230/240V, 50/60Hz @ 0.5A optional.
  Interface:	RS232 standard
  Weight:	45 lbs.
  Warranty:	One year
  Options:	DKBS - Bi-lateral slits DKGPIB - IEEE-488 communication interface (internal) DK2400 and Hand-held controllers for local control IR480 - Gold optics DK2PORT - Bifurcated fiber bundle for attaching 2 devices to 1 port. AB300 - Automated 6 position filter wheel See options and accessories

• Internal controller connes to any computer via RS232 or IEEE-488. Hands-off control of three slit emblies and two grating turrets.
• Scans in both direions and with Constant Speral Resolution (CSR).
• Triple-grating turrets allows high efficiency scanning across a broad speral range.
• Additive dispersion increases resolution and reduces stray light for Raman and fluorescence studies, subtraive dispersion minimizes broadening of pulse sources.
• Integrates with SP filter wheel for automatic filter switching.
• May be faory configured as a mochromator or sperograph.

  The Pioneer: Better Resolution, Stray Light Control

  The DK242 is two cascaded mochromators, with the exit slit of the first mochromator funioning as the entrance slit of the second. This instrument may be faory configured to operate as either an additive or subtraive dispersion double mochromator. In both modes, the two mochromators a as a double filter with the rejeion of stray light being nearly the square of the single mochromator value. In the additive dispersion mode, the DK242 is the equivalent of a half-meter mochromator, but permits greater reduion of stray light. The first grating spreads the sperum over an angular range; the second grating then doubles this dispersion. The result is twice the resolution of a single 1/4-meter mochromator. In subtraive dispersion mode the first mochromator seles a bandp. The second mochromator then removes the temporal and angular aberrations introduced by the angular speral dispersion in the first mochromator.

  The DK242 offers a unique solution to praical problems in the speroscopy of pulsed sources. For example, an ordinary mochromator will introduce up to 250 pico second broadening in light pulses that are ped through the mochromator. Operated in the subtraive dispersion mode, the DK242 reduces this broadening to almost zero because the second mochromator equalizes the optical path length of the first.

  The DK242 is also a unique solution to the praical problems of Raman speroscopy because the high stray light rejeion of the two mochromators allows observation close to the laser line. SP's unique CSR scanning techlogy also improves efficiency in the red and near IR while maintaining resolution. (In the CSR mode, the mochromator's change in dispersion with wavelength is compensated by a change in slit widths while bandp remains constant. Intensity improvement up to 4x can occur).

  Equipped with SP's Dire Dial Drive, the DK242 is a complete computer-controlled instrument. The control eleronics are internal, calibration is automatic. Any computer can control the DK242 through its RS232 interface with simple commands (shown in all capital letters) to dire the mochromator to GO TO a wavelength, to SCAN between wavelengths at a preset SPEED, to SELE gratings, or to report its STATUS.

  Feature Value

  Design:	Double cascaded Czerny-Turner. Triple-grating turrets standard in each seion.
  Focal Length:	240mm each seion.
  f/#:	3.9 overall
  Wavelength Drive:	Dual worm and wheel with eleronic synchronization and computer control. Programmable in additive or subtraive dispersion
  Scan Speed:	> 1 to 1200nm/minute (with 1200 g/nm grating)
  Stray Light:	< 10-9
  Slits:	Unilateral, computer controlled, Width - 10μm to 3000μm Height - 2mm to 20mm
  Gratings:	Two to six gratings (68 x 68mm standard, 68 x 84mm optional) must be purchased. See Appendix A for options.
  Wavelength Precision:	0.01nm (additive)    0.01nm (subtraive)
  Wavelength Accuracy:	&plun; 0.3nm (additive)    &plun; 0.3nm (subtraive)
  Reciprocal Dispersion:	1.60nm/mm (additive)    --- (with 1200 g/mm grating)
  Max Resolution:	<0.04nm (additive)    0.06nm (subtraive)
  Pulse Broadening:	200 ps max (additive)    10 fs max (subtraive)
  Interface:	RS232 standard
  Software:	Demonstration control program and LabView driver included.
  Power:	110 / 120V, 50/60Hz @ 1A standard. 220/230/240V, 50/60Hz @ 0.5A optional.
  Warranty:	One year
  Options:	DKBS - Bi-lateral slits DKGPIB - IEEE-488 communication interface (internal) DK2400 and Hand-held controllers for local control IR240 - Gold optics DK2PORT - Bifurcated fiber bundle for attaching 2 devices to 1 port. AB300 - Automated 6 position filter wheel See options and accessories