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He-Ne Lab Laser 4.5 mW / Class IIIa
High-powered laser recommended for use in special educational, industrial and scientific arenas such as short holography exposures

Industrial Fiber Optics' CT Series of lasers is the most popular line of lasers used in middle and high schools in the United States. Designed for education, and featuring a bright blue transparent enclosure, their attractive looks invite students to participate and explore in optical and laser technology while seeing the laser's internal "working" components. With a complete set of features and long warranty, it is a product that is hard to surpass.

The IF HN50 is Industrial Fiber Optics' higher-powered CDRH Class IIIa helium-neon laser with a nominal output power of 4.5 mW in a highly collimated beam of 632.8nm red laser light. Typical applications of this laser are large optical demonstrations, experiments where the laser beam requires spatial filtering that causes significant losses, or holography.

CT Series lasers were designed for use solely in education. They are not an engineering product conveniently being sold for educational purposes. From the initial concept, everything about the attractive, safe design was to interest students in technology. It includes safety features such as 110-VAC-to-low-voltage power adapters, tamper-resistant screws, impact-resistant acrylic enclosure, easily locatable bright red laser shutter, bright and very durable nickel-plated laser aperture, industry-standard electrical connections and tripod mount.

  He-Ne Lab Laser

Part Number: IF HN50 
Price: $787.50
Operators Manual

Sold only through our educational distribution network.

Replacement for the ML 850

5 mW is the maximum optical power for Class IIIa laser systems.

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Other products for use with this laser:

Laser Optics Lab Physical Optics Lab


  • Hard-seal laser tube for long dependable life
  • All solid-state electronic design
  • Fool-proof mechanical beam stop
  • Bright laser pilot light
  • Impact-resistant, see-through, two-tone blue acrylic case
  • Tamper-resistant screws for safety
  • Threaded mounts for holding lenses, filters and diffraction gratings
  • Tripod mount - 1/4-20 thread
  • Rubber feet on chassis bottom for adhesion on slick lab surfaces
  • Full-color operators manual with safety information and common experiments
  • Labeling and safety requirements compliant with U.S. CDHR regulations
  • 110 VAC operation; 220 VAC upon request. Click Here to see what is available. Then select the part number required.

Suitable for experiments such as:

  • Refraction
  • Reflection
  • Tyndall's light-guiding-in-water experiments
  • Scattering of Light
  • Critical angle determination in materials
  • Convergence and divergence of lenses


All manufacturers of lasers used in the United States, must conform to regulations administered by the Center for Devices and Radiological Health (CDRH), a branch of the U.S. Department of Health and Human Services. CDRH categorizes lasers as follows:

 Class 1

A laser or laser system which does not present a hazard to skin or eyes for any wavelength or exposure time. Exposure varies with wavelength. For ultraviolet, .2 to .4m exposure is less than from .8 or near IR, the exposure is < 200w. Consult CDRH regulations for specific information.

 Class 2

Any visible laser with an output less than 1 mW of power. Warning label requirements yellow caution label stating maximum output of 1 mW. Generally used as classroom lab lasers, supermarket scanners and laser pointers.

 Class 3a

Any visible laser with an output over 1 mW of power with a maximum output of 5 mW of power. Warning label requirements red danger label stating maximum output of 5 mW. Also used as classroom lab lasers, in holography, laser pointers, leveling instruments, measuring devices and alignment equipment.

 Class 3b

Any laser with an output over 5 mW of power with a maximum output of 500 mW of power and all invisible lasers with an output up to 400 mW. Warning label requirements red danger label stating maximum output. These lasers also require a key switch for operation and a 3.5-second delay when the laser is turned on. Used in many of the same applications as the Class IIIa when more power is required.

 Class 4

Any laser with an output over 500 mW of power. Warning label requirements red danger label stating maximum output. These lasers are primarily used in industrial applications such as tooling, machining, cutting and welding. Most medical laser applications also require these high-powered lasers.

 CDRH Classification  Class IIIa
 Polarization  Random
 Laser Emission Color  Red
 Laser Mode  TEM00
 Operating  Unit  Value
 Input Voltage  V 12 to 18
 Input Current  mA 750
 Wavelength  nm  632.8
 Optical Output Power, Nominal  mW  4.5 mW /
 Power, (min/max)  mW  4.0 / 5.0
 Beam Diameter  mm  0.80
 Beam Divergence  mRad  1.80
 Digital Modulation  MHz n/a
 Analog Modulation  Hz to MHz n/a
 Mechanical  Unit  Value
 Operating Temperature  ° C  0 - 40
 Housing  cm  6.5 x 9.4 x 45.