DBX-IR ZnSe Laser Beam Expander - Compact - Universal

Dual band AR Coated for 3-5microns and 8-12 microns

Large clear output aperture 47mm

High performance lambda/4 design over 3-5microns & 8-12microns

Compact Optical length

Mounting M4, 8-32 also laser modules to 26mm dia

By simply changing input lens can be changed between 10X, 15X

Variable focus

Electrical isolation between laser and mounting base

Contact Us now at beamexpander@dioptika.com for more information.

DBX-IRL 100mm Large Output ZnSe Laser Beam Expander

Dual band AR Coated for 3-5microns and 8-12 microns

Large clear output aperture 100mm

High performance lambda/10 design over 3-5microns & 8-12microns

Mounting to fix to optical table

By simply changing input lens can be changed between 20X, 25X

Variable focus

Electrical isolation between laser and mounting base

           Laser Beam Expanders

           Laser beam expanders are designed to either decrease the laser's beam spot size at large distances or produce a larger
          diameter collimated laser beam. The main types of beam expanders: Keplerian and Galilean. In its simplest form, the Galilean
         type consists of a positive and a negative focal length lens whereas the Keplerian type consists of two positive focal length
         lenses. Both designs provide a certain angular magnification, called the Expander Power. The beam diameter is first increased
          in size by this power and then the beam divergence is reduced by the same power. This combination yields a beam that is not
         only larger, but one that is also highly collimated. The result is a smaller beam at a large distance when compared to the laser
         alone. See the below equation:

       B_L

=

ß + ØL (0.3048)

       B_L

=

Beam Diameter (mm) at distance L

     ß

=

Increase in Beam Diameter

=

Beam Diameter (mm) x Expander Power

     Ø

=

Decrease in Beam Divergence

=

Beam Divergence (mrad) Expander Power

     L

=

distance (ft.)

This equation is an approximation for the collimated output beam size at a given distance.

          In addition, an expanded beam can yield smaller spot sizes when used in combination with additional focusing optics. This is
         very useful in focusing optimization. however, many applications simply require a larger continuous beam. The beam expander
         power (MP) is equal to the ratio of the effective focal length (EFL) of the objective lens to the effective focal length of the entrance
         optic. The physical separation between the objective lens and entrance optic is equal to the sum of their back focal lengths (BFL).

          DiOptika’s beam expanders are of the Galilean type. The advantages of the Galilean design over the Keplerian is that it contains
         no internal focal point therefore reducing the length. In addition to improving beam collimation, DiOptika’s beam expanders can
         also be used to focus laser beams.