89 North Laser Diode Illuminators

	LDI is purchased with either 470 nm or 488 nm output		LDI is purchased with either 555 nm or 570 nm output
LDI 4-series	300 mW		1000 mW	1000 mW			1000 mW	700 mW	400 mW
LDI 5-series	450 mW		1000 mW	1000 mW			1000 mW	700 mW	900 mW	850 mW
LDI 7-series	300 mW	1000 mW	1000 mW	1000 mW	500 mW	500 mW	1000 mW	700 mW	400 mW
LDI‐NIR	450 mW	1000 mW	1000 mW	1000 mW	500 mW		1000 mW	700 mW	900 mW	850 mW
LDI PRIME	150 mW		N/A	800 mW			600 mW	N/A	300 mW

LDI 4‐Series

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 488 nm laser for FITC/GFP and with a 577 nm laser for TRITC/mCherry…or both!

Specifications
Source Type	Laser diodes
Lifetime	20,000 hrs – two‐year warranty
Laser Lines (nm)	405	470 or 488	555 or 577	640
Continuous Wave Stability2	<2%	<2%	<2%	<2%
Optical Power Min (mW)1	300	1000	1000 for 555 nm, 700 for 577 nm	400
Max Rise Time1	< 10 µs	< 10 µs	< 2 µs	< 10 µs
Max On/Off Frequency (Hz)3	>1000	>1000	100	>1000
Output Options	Optical fiber4
Control Options	TTL on/off (> 2.3 V)
	Analog intensity (0–5 V)
	USB–DSP (virtual COM port) – SDK available upon request
Safety	Interlocked housing
	Safety interlock
	Key interlock
	IEC 60825‐compliant
Dimensions (L×W×D)	12.5×9.2×5.75”
Dimensions (L×W×D)	318×234×146 mm
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

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

Features and Benefits
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
Feedback‐controlled optical stability	More repeatable optogenetics experiments
Up to 100:1 linear dynamic range	Ability to turn power down when needed and maintain stability and quantitative imaging
4 laser lines across the spectrum	Covers most of the standard fluorescence probes
No user alignment	Ease of use and maintainability
TTL and Analog control	Supports operation without software‐specific drivers

LDI Family Specifications in PDF format

LDI 5‐Series

The LDI‐5 is the big sister of the LDI‐4 laser diode illuminator. Once again we listened to our users who asked for a pared down version of the LDI‐NIR. The LDI‐5 has increased power over her little sister and expands into the near infra‐red with the addition of a 730nm line. This unit is also available with a 488nm laser for FITC/GFP and with a 577nm laser for TRITC/mCherry…or both!

Specifications
Source Type	Laser diodes
Lifetime	20,000 hrs – two‐year warranty
Laser Lines (nm)	405	470 or 488	555 or 577	640	730
Continuous Wave Stability2	<2%	<2%	<2%	<2%	<2%
Optical Power Min (mW)1	450	1000	1000 for 555 nm, 700 for 577 nm	900	850
Max Rise Time1	< 10 µs	< 10 µs	< 10 µs	< 2 µs	< 10 µs
Max On/Off Frequency (Hz)3	>1000	>1000	>1000	100	>1000
Output Options	Optical fiber4
Control Options	TTL on/off (> 2.3 V)
	Analog intensity (0–5 V)
	USB–DSP (virtual COM port) – SDK available upon request
Safety	Interlocked housing
	Safety interlock
	Key interlock
	IEC 60825‐compliant
Dimensions (L×W×D)	12.5×9.2×5.75”
Dimensions (L×W×D)	318×234×146 mm
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

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

Features and Benefits
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
Feedback‐controlled optical stability	More repeatable optogenetics experiments
Up to 100:1 linear dynamic range	Ability to turn power down when needed and maintain stability and quantitative imaging
5 laser lines across the spectrum	Covers most of the standard fluorescence probes
No user alignment	Ease of use and maintainability
TTL and Analog control	Supports operation without software‐specific drivers

LDI Family Specifications in PDF format

LDI 7‐Series

The LDI‐7 is a multi‐line, solid‐state laser illuminator offering up to 1000 mW of output power per laser line via a multi‐mode 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.

Specifications
Source Type	Laser diodes
Lifetime	20,000 hrs – two‐year warranty
Laser Lines (nm)	405	445	470 or 488	520	528	555 or 577	640
Continuous Wave Stability2	<2%	<2%	<2%	<2%	<2%	<2%	<2%
Optical Power Min (mW)1	300	1000	1000	500	500	1000 for 555 nm, 700 for 577 nm	400
Max Rise Time1	< 10 µs	< 10 µs	< 10 µs	< 10 µs	< 10 µs	< 2 µs	< 10 µs
Max On/Off Frequency (Hz)3	>1000	>1000	>1000	>1000	>1000	100	>1000
Output Options	Optical fiber4
Control Options	TTL on/off (> 2.3 V)
	Analog intensity (0–5 V)
	USB–DSP (virtual COM port) – SDK available upon request
Safety	Interlocked housing
	Safety interlock
	Key interlock
	IEC 60825‐compliant
Dimensions (L×W×D)	12.5×9.2×5.75”
Dimensions (L×W×D)	318×234×146 mm
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

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

Features and Benefits
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
Feedback‐controlled optical stability	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 seven laser lines	Covers most of the standard fluorescence probes
No user alignment	Ease of use and maintainability
TTL and Analog control	Supports operation without software‐specific drivers

89 North LDI-7 Laser Diode Illuminator — 89 North LDI‐7 Laser Diode Illuminator

LDI Family Specifications in PDF format

LDI‐NIR

The LDI‐NIR is the same great multi‐line, solid‐state laser illuminator as the LDI‐7, but offers more power and extends the range into the NIR. This affordable multi‐mode laser launch will change how you imagine laser illumination.

Specifications
Source Type	Laser diodes
Lifetime	20,000 hrs – two‐year warranty
Laser Lines (nm)	405	445	470 or 488	520	555 or 577	640	730
Continuous Wave Stability2	<2%	<2%	<2%	<2%	<2%	<2%	<2%
Optical Power Min (mW)1	450	1000	1000	500	1000 for 555 nm, 700 for 577 nm	900	850
Max Rise Time1	< 10 µs	< 10 µs	< 10 µs	< 10 µs	< 2 µs	< 10 µs	< 10 µs
Max On/Off Frequency (Hz)3	>1000	>1000	>1000	>1000	>1000	100	>1000
Output Options	Optical fiber4
Control Options	TTL on/off (> 2.3 V)
	Analog intensity (0–5 V)
	USB–DSP (virtual COM port) – SDK available upon request
Safety	Interlocked housing
	Safety interlock
	Key interlock
	IEC 60825‐compliant
Dimensions (L×W×D)	12.5×9.2×5.75”
Dimensions (L×W×D)	318×234×146 mm
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

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

Features and Benefits
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
Feedback‐controlled optical stability	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 seven laser lines	Covers most of the standard fluorescence probes (405 nm, 445 nm, 470 nm, 520 nm, 555 nm, 640 nm, 730 nm)
No user alignment	Ease of use and maintainability
TTL and Analog control	Supports operation without software‐specific drivers

89 North LDI-NIR Laser Diode Illuminator — 89 North LDI‐NIR Laser Diode Illuminator

LDI Family Specifications in PDF format

LDI‐PRIME

The LDI‐PRIME laser diode illuminator was designed specifically for those researchers whose work demands the 488 nm laser. As this is a premium laser line, we combined it with a collection of three other lasers to cover the visible spectrum as simply as possible to provide essential power and performance at an affordable price. To keep it simple we also combined all the lasers into a single 400 µm fiber optic output.

Specifications
Source Type	Laser diodes
Lifetime	20,000 hrs – two‐year warranty
Laser Lines (nm)	405	488	555	640
Continuous Wave Stability2	<2%	<2%	<2%	<2%
Optical Power Min (mW)1	150	800	600	300
Max Rise Time1	< 10 µs	< 10 µs	< 10 µs	< 10 µs
Max On/Off Frequency (Hz)3	>1000	>1000	>1000	>1000
Output Options	Optical fiber4
Control Options	TTL on/off (> 2.3 V)
	Analog intensity (0–5 V)
	USB–DSP (virtual COM port) – SDK available upon request
Safety	Interlocked housing
	Safety interlock
	Key interlock
	IEC 60825‐compliant
Dimensions (L×W×D)	12.5×9.2×5.75”
Dimensions (L×W×D)	318×234×146 mm
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

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

Features and Benefits
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
Feedback‐controlled optical stability	More repeatable optogenetics experiments
Up to 100:1 linear dynamic range	Ability to turn power down when needed and maintain stability and quantitative imaging
4 laser lines	Covers most of the standard fluorescence probes (405nm, 488 nm, 555 nm, 640 nm)
No user alignment	Ease of use and maintainability
TTL and Analog control	Supports operation without software‐specific drivers

89 North LDI-PRIME Laser Diode Illuminator — 89 North LDI‐PRIME Laser Diode Illuminator

LDI Family Specifications in PDF format

A Family of High‐performance Light Sources

Scientific Applications

Product Line Overview

Features and Benefits

High Output Power

Feedback‐controlled Optical Stability

Ease of Use

LDI 4‐Series

LDI 5‐Series

LDI 7‐Series

LDI‐NIR

LDI‐PRIME

Need a product demo? Contact us.

			LDI is purchased with either 470 nm or 488 nm output				LDI is purchased with either 555 nm or 570 nm output
	405 nm	445 nm	470 nm	488 nm	520 nm	528 nm	555 nm	577 nm	640 nm	730 nm
LDI 4-series	300 mW		1000 mW	1000 mW			1000 mW	700 mW	400 mW
LDI 5-series	450 mW		1000 mW	1000 mW			1000 mW	700 mW	900 mW	850 mW
LDI 7-series	300 mW	1000 mW	1000 mW	1000 mW	500 mW	500 mW	1000 mW	700 mW	400 mW
LDI‐NIR	450 mW	1000 mW	1000 mW	1000 mW	500 mW		1000 mW	700 mW	900 mW	850 mW
LDI PRIME	150 mW		N/A	800 mW			600 mW	N/A	300 mW