N61 Air-Cooled Argon Laser



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HN61 Crosfield Laser

N61 Air-Cooled Argon Laser



The N61 argon laser is an excellent replacement laser head. Designed in a traditional rectanglar package, the N61 provides excellent beam quality and long laser life. The N61 also offers improved thermal stability, and low electronic and optical noise. The laser incorporates the latest in internal mirror tube technology securing permanent beam alignment and eliminating contamination. NLC’s design permits ease of servicing and simple, drop-in laser tube replacement.

Design Drawings


N61 Laser Head and Power Supply


















  • Superior Beam Quality
  • Low Optical and Electronic Noise
  • Internal Mirror Design
  • Extended Lifetime
  • Drop-in Tube Replacement
  • Exceptional Warranty


  • Pre-Press Color Separations & Scanning
  • High Speed Laser Printing
  • Photo Plotters for PCB manufacturing
  • Graphic Arts
  • Flow Cytometry
  • DNA Sequencing
  • Confocal Microscopy
  • Spectroscopy
  • Hematology
  • Medical Detection Equipment
  • Basic Research


Operational and Physical Specifications

Optical Specifications1,3,4 458nm 488nm 514nm 458-514nm
Output Power 3mW 10, 15mW 10mW 25mW
Operating Current2 <7A <7A <7A <7A
Spatial Mode TEMoo, M2 ≤1.2 TEMoo, M2 ≤1.2 TEMoo, M2 ≤1.2 TEMoo, M2 ≤1.2
Beam Diameter (mm) 0.63±5% 0.65±5% 0.67±5% 0.67±5%
Beam Divergence (mrad) <1.0 <1.0 <1.0 <1.0
Polarization Ratio >250:1 >250:1 >250:1 >250:1
Beam Point Stability over 2 hrs ±30 µrad/±3˚C ±30 µrad/±3˚C ±30 µrad/±3˚C ±30 µrad/±3˚C
Power Stability over 2 hrs ±1% ±1% ±1% ±1%
Beam Position ±1.0 mm ±1.0 mm ±1.0 mm ±1.0 mm
Beam Angle ≤5.0 mrad ≤5.0 mrad ≤5.0 mrad ≤5.0 mrad
Noise Specifications1,3,4  
Noise @ 20Hz - 2kHz (p-p) .02%
Noise @ 20Hz - 20kHz (p-p) 2.0%
Noise @ 20Hz - 2MHz (rms) 1.0%
Power Requirements1,3  
Voltage (Universal Input) 120 to 240 VAC ±10%
Current 16 Amps Max.
Frequency 47-63 Hz
Phase Single
Environmental Specs1  
4-40˚C (40-105˚F)
-30-60˚C (-22-140˚F)
Humidity (no condensation)
0 to 90%
0 to 100%
Altitude 0-3000m (0-9,800ft)
Shock (11msec) 25g
Laser Head Weight
(std, lrg fan)
11.1, 12.4 lbs
(5.03, 5.62 kg)
Air Intake
Standard fan configuration
Large fan configuration
106 CFM
225 CFM
Air Intake Clearance 2.5cm (1in)



  1. Specifications subject to change without notice.
  2. When used with 9400 series power supply.
  3. Measurements taken in light control after 5 minute warm-up.
  4. Nominal operating current at beginning of life.


The laser head is warranted to be free from defects in materials or workmanship for a period of eighteen (18) months from the date of shipment or six thousand (6,000) hours of operation at or below standard operating specifications, whichever first occurs.

PDF Downloads

N61 Air-Cooled Argon Laser - Spec Sheet





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The N61 Argon Laser Provides Excellent Beam Quality and Long Laser Life.