Lasers & Light Sources

89 North

89 North

89 North® is a wholly owned subsidiary of Chroma Technology. They are a manufacturer of illumination systems for fluorescence microscopy.


89 North89 North LDI

LDI – Laser Diode Illuminator

High-power, low-cost, laser diode illuminator

The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output power via a multimode fiber at the price of lower power LED light engines. With feedback controlled output stability and up to a 100:1 linear dynamic range, the LDI is the ideal light source for a wide range of applications including spinning disk confocal microscopy, structured illumination microscopy, FRAP, photoactivation/photoconversion, and PALM/STORM.

  • 6- or 7-line laser diode illuminator
  • Up to 1W of power per line
  • Multimode fiber coupled


Number of laser lines6 or 7 lines, depending on the model
Laser wavelengthsLDI-6 – 405/445/470/520/528/640
LDI-7 – 405/445/470/520/528/555/640
Output powerOut of 400 micron, 0.22 NA fiber
405 nm –  300 mW
445 nm –  1000 mW
470 nm –  1000 mW
520 nm –  500 mW
528 nm –  500 mW
555 nm –  1000 mW
640 nm –  500 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
Up to 7 linesCovers 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

Learn More »

LDI Complete Family