Zoom Beam Expanders

We offer 3 types of beam expanders: fixed beam expanders, zoom beam expanders and motorised beam expanders at various wavelengths of 213nm, 266nm, 343-355nm, 405nm, 633nm, 515-545nm, 808-980nm, 1030-1090nm, 155nm, 1850-1980nm, 10.6um. Other wavelengths and custom-designed beam expanders are available upon request. For more information, please feel free to contact us.

We may use the following abbreviations in the tables: WL=wavelength, MAG=magnification, CA=clear aperture, CA1=input clear aperture, CA2=output clear aperture, D1=input diameter, D2=output diameter, L1=total length of beam expander, M1=connection or mounting thread, D=diameter.

BEST-E and BEST-F Series 1064/532/355/213nm Zoom Beam Expanders

BEAL Series 355/532/1064nm Zoom Beam Expanders

BEAL Series Motorized Zoom Beam Expanders

BEAL is a zoom beam expander designed for automated applications. It combines multiple lenses to provide variable magnification and automated pergence adjustment from 1x to 6x. Driver and all the motors are integrated in the casing of the beam expander which makes it compact and convenient for usage. High pointing stability (<0.1 mrad) and fast magnification speed (1 sec from 1x to 6x) offers suitable performance for precision and high speed industrial applications.

Features

• Aberration minimized design
• Plug & play solution (controller included)
• Suitable for ultrafast picosecond and femtosecond lasers
• Direct control from microcontrollers and embedded systems
• Laser damage threshold up to 100mJ/cm² @ 1064nm, 10ps, 400kHz
• Custom wavelengths are available in the range of 250-3000nm

Standard specifications:

BEAL Series Zoom Beam Expanders

Zoom beam expanders are ideal for systems in which different magnifications and precise control of laser beam pergence are required. We offer Galilean type zoom beam expanders with high LIDT AR coatings that minimize ghost reflections. Our zoom beam expanders allows to separately adjust magnification and pergence. Two main standard products change magnification in the range of 1x-4x and 2x-8x.

Features

• High pointing stability (<1 mrad)
• Inpidual reports of beam ellipticity, M2 and pointing stability parameters
• Mounting adapters at the input, output and middle are available on request
• Extended lifetime and LIDT for UV applicationsAvailable wavelength range: 266 – 1064 nm
• Available expansions: 1x-4x or 2x-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

* Max input beam diameter ensuring diffraction limited performance.

YAG Laser Zoom Beam Expanders (266nm, 355nm, 532nm, 1064nm)

1. STS Series YAG Laser Zoom Beam Expanders (266/355/532/1064nm)

• for collimation of high power lasers
• variable magnification from 1x up to 8x
• additional 8 "click into place points" guarantee best
• reprodution of magnification
• high pointing stability < 1 mrad
• Galilei-design
• available with and without adjustable pergence
• UV beam expander made completely from quartz material
• max. exit pupil depending on the model f30mm or f50mm

Our zoom beam expanders (or called as variable beam expander) are highly corrected 4-lens element systems. The version with pergence adjustment is very user friendly, as the magnification setting and the pergence setting are independent from each other, i.e. the pergence remains unchanged while changing the expansion factor. In addition, the total length of the beam expanders remain constant during zooming and/or pergence setting. For remote controlled setting, we developed motorized versions of our zoom beam expanders. A motor adapter can be incorporated to drive the mechanics used for magnification setting.

2. BEST-W Series YAG Laser Zoom Beam Expanders (266/355/532/1064nm)

We are proud to present our new product. It is specially designed to cater for the various variable magnification of 2x up to 8x. It consists of adjustable pergence. These beam expanders are primarily intended for Nd:YAG, Green & UV lasers. They offer diffraction-limited performance at 1064nm wavelength.

• For collimation of laser power<500kw/cm2
• Variable magnifications 2x-8x
• Galilei Design
• Adjustable pergence

STS Series 1550nm Zoom Beam Expanders

The material is fused silica.

STS Series 1850-1980nm Zoom Beam Expanders

The material is fused silica

BEST-W Series 9.4um & 10.6um CO2 Laser Zoom Beam Expanders

• For collimation of Co2 laser power<1.5KW/cm2
• Variable magnifications 2X-8X
• Galilei Design
• Adjustable pergence

BED Series Motorized Zoom Beam Expanders

For automated applications, we developed motorized zoom beam expanders BED-GCD-14 series. They use the 4 lens element optical designs and the build-in adjustment motors for controlling lens groups. With the motorized systems, both magnification and focus can be controlled independently.

With our optics motorized zoom beam expanders, variable expansion ratio can automatically be set from 1.5X to 6X. This variability helps to reduce machine set up times and provides flexibility to equipment for a wide range of jobs.

Features

• Continuous variable expansion ratio
• Wavelength 450-650nm, 780-1080nm or 10.6um
• Default expansion ratio setting pre-programmed
• User-defined magnification settings
• Use-controlled focus adjustment
• Communication with PC or joystick with a DSB
• Compact in size at 190x120x103.5mm