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Variable Beam Expanders

Variable Beam Expanders

Available wavelength range

266 – 1064 nm

Available expansions

1x-4x or 2x-8x

Pointing stability

<1 mrad

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 where different magnifications and precise control of laser beam divergence are required.

Altechna offers variable beam expanders with high pointing stability and high LIDT AR coatings that minimize ghost reflections. Our variable beam expanders allow separate magnification and divergence adjustment. Once the desired beam size and divergence is reached, position can be locked with two set of screws. The design is compact and suitable for an industrial environment. Individual reports of beam ellipticity, M2 and pointing stability parameters can be provided on request. Depending on customer’s system design, mounting adapters at the center, input and output are available.

Typical Items for Variable Beam Expanders
Wavelength, nmExpansion rangeMax input beam diameter*, mmHousing dimensions, mmProduct ID
343-3551x-4x1X; 4.0Ø41 x 120VBE-1X-4X-0343-0355-B
2X; 5.5
3X; 3.0
4X; 3.0
2x-8x2X; 5Ø41 x 145VBE-2X-8X-0343-0355-B
3X; 5.0
4X; 4.0
5X; 3.0
6X; 2.5
7X; 2.25
8X; 2.0
515-5321x-4x1X; 4.5Ø41 x 120VBE-1X-4X-0515-0532-B
2X; 6.5
3X; 4.0
4X; 4.0
2x-8x2X; 5.0Ø41 x 147.5VBE-2X-8X-0515-0532-B
3X; 5.0
4X; 4.0
5X; 3.0
6X; 2.5
7X; 2.25
8X; 2.0
1030-10641x-4x1X; 4.5Ø41 x 120VBE-1X-4X-1030-1064-B
2X; 7.0
3X; 5.0
4X; 4.0
2x-8x2X; 5.0Ø41 x 147.5VBE-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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