89 North

LDI-4 Laser Diode Illuminator

The LDI-4 laser diode illuminator is a user inspired version of the original LDI-7.  Many researchers were asking for a laser launch that covered only the 4 basic lines: DAPI, FITC, TRITC, Cy5.  89 North listened and we responded.  The LDI-4 has only the lines you asked for.  While we reduced the number of lines inside the box, we made no compromises on the quality and performance you’ve come to expect from 89 North.  This unit is also available with a 488nm laser for FITC/GFP and with a 577nm laser for TRITC/mCherry…or both!

In Stock

The LDI-4 is a multiline, solid-state laser illuminator offering 4 laser lines across the visible with powers up to 1W. The unit offers feedback controlled output stability and up to a 100:1 linear dynamic range.  LDI-4 gets the job done with the same great performance found in earlier models.

Number of laser lines4 lines
Laser wavelengthsLDI-4 : 405/470/555/640

LDI-4-488 : 405/488/555/640

LDI-4-577 : 405/470/577/640

LDI-4-488-577 : 405/488/577/640

Output powerOut of 400 micron, 0.22 NA fiber


405 nm –  300 mW
470 nm –  1000 mW  OR 488nm – 1000mW
555 nm –  1000 mW  OR 577nm – 750mW
640 nm –  450 mW

Lifetime20,000 hrs – 2 year warranty
Stability<1% RMS (at 100% laser power)
Dimensions12.5″ x 9.2″ x 5.75″
High output powerShorter exposures
Faster imaging
Faster activation times in optogenetics and photoactivation experiments
Faster bleaching times in FRAP experiments
Feedback controlled optical stabilityQuantitative imaging, ideally suited for ratiometric imaging
More repeatable optogenetics experiments
Up to 100:1 linear dynamic rangeAbility to turn power down when needed and maintain stability and quantitative imaging
4 laser lines across the spectrumCovers most of the standard fluorescence probes
No user alignmentEasy to use and maintain
TTL and Analog controlNo need for software specific drivers
  • Spinning Disk Confocal Illumination
  • Photoactivation/Photoconversion/FRAP
  • Optogenetics
  • Whole Animal Imaging

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