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Large-Output Beam Expanders
Apr 2008
Special Optics Inc.Request Info
WHARTON, N.J. - April 22, 2008 -- Special Optics Inc., a Navitar company, has introduced a line of high-performance large-output laser beam expanders that include diffraction-limited optical designs with large output clear apertures of 10 to over 100 mm, expansion ratios from 5X to 40X, and input apertures of 1.3 to 20 mm.

With high transmission and low wavefront distortion, the large-output beam expanders can be specified at single and dual wavelengths from 248 to 1550 nm and have damage thresholds of typically 500 MW/cm2. Featuring standard clear entrance apertures of up to 20 mm, the beam expanders transmit the entire beam with excellent wavefront quality, the company said.

Special-OpticsBeamExpanders.jpgThe beam expanders allow proper collimation and a more controlled focus or defocus of the beam. These Galilean-design beam expanders provide an adjustable focus for collimation at varying wavelengths which can be used for divergence correction, collimation and focusing. They are adaptable for complex applications requiring increased power density at the focal point, beam guidance over a long distance, dual wavelengths (1064 nm and 532 nm), high-power laser energy and large aperture needs.

Special Optics said its beam expanders are designed to be rugged and self-supporting and provide performance from the ultraviolet to the visible and infrared regions. With aluminum construction to minimize thermal distortion, the beam expanders are easy to use and provide accurate, unobstructed expansion for any collimated input source.

When used in combination with its f-Theta lenses, the large-output beam expanders can be used for a variety of laser processing and laser micromachining tasks, the company said, such as:
  • Cutting of solar cells
  • Marking of diverse materials
  • Drilling of metal sheets
  • Structuring of metal foils
  • Scribing of ceramic substrates
For more information, visit:; e-mail:

Special Optics (a Navitar company)
315 Richard Mine Rd.
Wharton, N.J. 07885
Phone: (973) 366-7289
Fax: (973) 366-7407


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An opening or hole through which radiation or matter may pass.
1. A bundle of light rays that may be parallel, converging or diverging. 2. A concentrated, unidirectional stream of particles. 3. A concentrated, unidirectional flow of electromagnetic waves.
beam expander
A system of optical components designed to increase the diameter of a radiation beam. Usually an afocal system.
1. The process of aligning the optical axes of optical systems to the reference mechanical axes or surfaces of an instrument. 2. The adjustment of two or more optical axes with respect to each other. 3. The process by which a divergent beam of radiation or particles is converted into a parallel beam.
As a wavefront of light passes by an opaque edge or through an opening, secondary weaker wavefronts are generated, apparently originating at that edge. These secondary wavefronts will interfere with the primary wavefront as well as with each other to form various diffraction patterns.  
A general term referring to the situation in which an image is not a true-to-scale reproduction of an object. The term also is used to connote the temporal alteration of the signal's waveform shape. There are many types of distortion. See also anamorphic distortion; curvilinear distortion; keystone distortion; panoramic distortion; perspective distortion; radial distortion; stereoscopic distortion; tangential distortion; wide-angle distortion.
Pertaining to optics and the phenomena of light.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
solar cell
A device for converting sunlight into electrical energy, consisting of a sandwich of P-type and N-type semiconducting wafers. A photon with sufficient energy striking the cell can dislodge an electron from an atom near the interface of the two crystal types. Electrons released in this way, collected at an electrode, can constitute an electrical current.
In considering a field of electromagnetic energy emanating from a source, the wavefront is a surface connecting all field points that are equidistant from the source.
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