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Variable Beam Expanders

Variable Beam Expanders

Wavelength range

266 – 1064 nm

Expansion

1-4x; 2-8x

Lens material

UVFS

Transmitted wavefront distortion, P-V

<λ/4 @ 632.8 nm

Overall transmission

97%

Mounting thread

SM1

LIDT

>10 J/cm2 @ 1064 nm, 10 ns, 10 Hz

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Variable beam expanders are ideal for systems in which different magnifications and precise control of laser beam divergence are required.

Altechna offers Galilean type variable beam expanders with high LIDT AR coatings that minimize ghost reflections. Our variable beam expanders allow you to separately adjust magnification and divergence, with two set screws to lock the magnification and divergence positions once the desired beam size is reached. The design is compact and suitable for an industrial environment.

Our standard beam expanders are designed for high power Nd:YAG lasers, but custom wavelengths are available on request.

Typical Items for Variable Beam Expanders
Wavelength, nm Expansion range Max input beam diameter*, mm Housing dimensions, mm Product ID
343-355 1x-4x 1X; 4.0 Ø41 x 120 VBE-1X-4X-0343-0355-B
2X; 5.5
3X; 3.0
4X; 3.0
2x-8x 2X; 5 Ø41 x 145 VBE-2X-8X-0343-0355-B
3X; 5.0
4X; 4.0
5X; 3.0
6X; 2.5
7X; 2.25
8X; 2.0
515-532 1x-4x 1X; 4.5 Ø41 x 120 VBE-1X-4X-0515-0532-B
2X; 6.5
3X; 4.0
4X; 4.0
2x-8x 2X; 5.0 Ø41 x 147.5 VBE-2X-8X-0515-0532-B
3X; 5.0
4X; 4.0
5X; 3.0
6X; 2.5
7X; 2.25
8X; 2.0
1030-1064 1x-4x 1X; 4.5 Ø41 x 120 VBE-1X-4X-1030-1064-B
2X; 7.0
3X; 5.0
4X; 4.0
2x-8x 2X; 5.0 Ø41 x 147.5 VBE-2X-8X-1030-1064-B
3X; 5.0
4X; 5.0
5X; 4.0
6X; 3.0
7X; 2.5
8X; 2.5

* Max input beam diameter at 1/e2 intensity level ensuring diffraction limited performance

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