89 North

LDI-7 Laser Diode Illuminator

The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output power per laser line 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

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The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output power per laser line 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.

Source Type Laser Diodes
Lifetime 20,000 hrs – 2 year warranty
Laser Line (nm) 405 445 470 520 528 555 640
Width; Max FWHM (nm) 1.8 2.2 2.2 3.8 4.0 1.6 2.0
Centroid Wavelength Range (nm)1 397-407 438-450 463-470 514-523 526-535 552-557 632-644
Continuous Wave Stability2 < 2% < 2% < 2% < 2% < 2% < 2% < 2%
Optical Power Min (mW)1 300 1000 1000 500 500 1000 400
Max Rise Time1 < 10μs < 10μs < 10μs < 10μs < 10μs < 2ms < 10μs
Max On/Off Frequency (Hz)3 > 1000 > 1000 > 1000 > 1000 > 1000 100 > 1000
Output Options  optical fiber 4
Control Options TTL (>2.3 V)
Analog (0–5 V)
USB–DSP (virtual COM port) – SDK available upon request
Safety Interlocked housing
Safety interlock
Key interlock
IEC 60825 compliant
Dimensions 12.5” x 9.2” x 5.75”, 318mm x 234mm x 146mm
Weight ~9 lbs
Operating Temperature 15-30 ̊ C
Storage Temperature -18-50 ̊ C
Humidity < 80% non-condensing
Voltage 90–220 V AC, 50–60 Hz
Fuse None

1. Measured at 100% intensity, 23°C ± 2°C
2. RMSE relative to the mean power measurements, measured at 100% intensity, 23°C ± 2°C
3. Measured at 100% intensity, 50% duty cycle
4. Recommended output fiber is 400 μm, 0.39 NA bifurcated fiber

High output power Shorter exposures
Faster imaging
Faster activation times in optogenetics and photoactivation experiments
Faster bleaching times in FRAP experiments
Feedback controlled optical stability Quantitative imaging, ideally suited for ratiometric imaging
More repeatable optogenetics experiments
Up to 100:1 linear dynamic range Ability to turn power down when needed and maintain stability and quantitative imaging
Up to 7 lines Covers most of the standard fluorescence probes
No user alignment Easy to use and maintain
TTL and Analog control No need for software specific drivers
  • Spinning Disk Confocal Illumination
  • Photoactivation/Photoconversion/FRAP
  • Optogenetics
  • Whole Animal Imaging

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