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Beam Expander

In its broadest sense, a beam expander is any optical system designed to increase the diameter of a laser beam. In most cases, the term is taken to mean a telescope designed to take a small-diameter collimated beam input beam and produce a larger diameter collimated output beam, thus reducing the divergence of the beam. The beam expander consists of a negative input lens and a positive objective. The expansion factor is the ratio of the focal length of the two lenses.

Wavelength Range: 532nm, 632.8nm
Recommended Beam Diameter: <0.14mm
Dimension Tolerance: 0.2mm
Surface Quality: 60/40 scratch and dig
Coatings: AR-Coatings @ 532nm
Wavefront Distortion:
l/2 (p-p, over clear aperture, @ 632.8 nm)

Part No.
Expansion ratio
Concave Lens (mm)
Convex Lens (mm)
Distance
BE0005
5X
6
6
20mm
BE0007
7.5X
6
6
16mm
BE0010
10X
8
8
30mm
BE0015
15X
8
8
45mm
BE0030
30X
6
8
50mm
BE0100
100X
8
20
165mm
Other expansion ratio and wavelength are available upon request.
The BE0030 consists of a concave lens and two convex lens.
The BE0100 consists of a achromatic lens and a convex lens.

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