89 North

LDI-WF Laser Diode Illuminator for Widefield Microscopy

The LDI-WF is a powerful and inexpensive light engine designed specifically for widefield microscopy. This unit offers the same seven laser lines in the same power range as 89 North’s successful LDI, but delivers the light to your microscope via a 3mm Liquid Light guide. The LDI has built-in homogenization and our 555nm or 577nm laser diodes covers the ‘green gap’ common in other solid-state light engines.

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The LDI-WF is a powerful and inexpensive light engine designed specifically for widefield microscopy. This unit offers the same seven laser lines in the same power range as 89 North’s successful LDI, but delivers the light to your microscope via a 3mm Liquid Light guide. The LDI has built-in homogenization and our 555nm laser diode covers the ‘green gap’ common in other solid-state light engines.

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 Power
Out of 3mm Liquid Light guide

405 nm –  200 mW
445 nm –  1000 mW
470 nm –  1000 mW
520 nm –  500 mW
528 nm –  440 mW
555 nm –  900 mW
640 nm –  400 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

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