LBS-400 Beam Splitter for Laser Beam Profilers

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Overview

The LBS-400 beam sampler attachment for cameras allows you to measure UV or IR wavelength laser beams with diameters up to 1 in. and powers ranging from 10 mW to ~500W⁽¹⁾. The beam sampler is designed so that the preferential polarization selection effect of a single wedge is canceled out and the resulting beam image is polarization corrected to restore the polarization components of the original beam.

⁽¹⁾ For Gaussian beam diameter <1/2 the clear aperture and depending on ND filter and camera saturation limits the maximum power may be as high as 1200W.

Measure UV, NIR or IR wavelength laser beams
Diameters up to 1 in. (25.4 mm)
Powers from 10 mW to ~500 W

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Products

Compare	Model	Compatibility	rankScore		Availability	Price	Brand
SP90351 LBS-400-UV Beam Sampler Attachment, Inconel, 193-355 nm, 10 mW to 500 W $5,488 In Stock	SP90351 LBS-400-UV Beam Sampler Attachment, Inconel, 193-355 nm, 10 mW to 500 W	UNIVERSAL	1.0	1.0	In Stock	$5,488	Ophir
SP90354 LBS-400-NIR Beam Sampler Attachment, Bulk ND, 1064 nm, 10 mW to 500 W $4,535 1 Week	SP90354 LBS-400-NIR Beam Sampler Attachment, Bulk ND, 1064 nm, 10 mW to 500 W	UNIVERSAL	1.0	2.0	1 Week	$4,535	Ophir
SP90349 LBS-400-IR Beam Sampler Attachment, CaF₂, 10.6 μm, 10 mW to 500 W $4,395 1 Week	SP90349 LBS-400-IR Beam Sampler Attachment, CaF₂, 10.6 μm, 10 mW to 500 W	UNIVERSAL	1.0	3.0	1 Week	$4,395	Ophir

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Specifications

Models	LBS-400-UV SP90351	LBS-400-NIR SP90354	LBS-400-IR SP90349
Spectral Range	193-355 nm	1064 nm	10.6 μm
Material	Wedge: UVFS Filter: Inconel	Wedge: BK7 Filter: Bulk ND	Wedge: ZnSe Filter: CaF₂
Wedge Reflection	AR coated, ≤1.5%	AR coated, ≤1%	AR coated, ≤1%
Reflection	0.01%	0.01%	0.01%
Nominal ND	0.5, 1.0 in both filters	0.5, 1.0 in both filters	0.5, 1.0 in both filters
Damage Threshold	100 W/cm², 20 mJ/cm² 10 ns pulse	50 W/cm², 1 J/cm² 10 ns pulse	5 W/cm², 300 J/cm² 1 ms pulse
Clear Aperture	Ø31.75 mm	Ø31.75 mm	Ø31.75 mm

Features

LBS-400 Beam Splitters

The beam sampler operates by reflecting the incoming beam from the front surfaces of a pair of wedges through 90 degrees into the camera. Approximately 99% of the beam is transmitted through each beam sampler with 0.01% passed on to the camera. A set of adjustable filters are provided to make final intensity adjustments to the beam before it reaches the camera imager.

Frequently Asked Questions

What should be my safety concerns while using LBS-400?
Answer
Regular laser safety precautions should apply. Please note, that the main incident beam will exit the LBS-400 refracted approximately 6°. Provision must be made to safely contain the transmitted beam by beam dump or power meter.

How to deal with removable Beam Blocker?
Answer
The beam blocker is designated to keep one wedge surface protected during handling and shipping. It can be left attached for low power laser operations. However, in the case of high-power laser irradiation scattered light might interfere with beam profile measurement and cause offset. In case of such offset, we recommend removing the beam blocker.
After removal, an additional laser output, having less than 0.1% of incident beam power will be reflected. That beam could be used for simultaneous measurement of laser power via Ophir Power Meter in addition to beam profiler.

Can I use LBS-400 both for beam profiling and power measurement?
Answer
Yes, the main function of LBS-400 beam splitter is Beam profiling, however, it performs a 3-way beam splitting:
Less than 0.01% (1/10³) of the beam is reflected in one direction and less than 1% in another while the remaining 99% of the incident laser beam is transmitted.
This allows user to measure one of the 3 beams, depending on available power measurement equipment and setup convenience.

Frequently Asked Questions

What should be my safety concerns while using LBS-400?
Answer
Regular laser safety precautions should apply. Please note, that the main incident beam will exit the LBS-400 refracted approximately 6°. Provision must be made to safely contain the transmitted beam by beam dump or power meter.

How to deal with removable Beam Blocker?
Answer
The beam blocker is designated to keep one wedge surface protected during handling and shipping. It can be left attached for low power laser operations. However, in the case of high-power laser irradiation scattered light might interfere with beam profile measurement and cause offset. In case of such offset, we recommend removing the beam blocker.
After removal, an additional laser output, having less than 0.1% of incident beam power will be reflected. That beam could be used for simultaneous measurement of laser power via Ophir Power Meter in addition to beam profiler.

Can I use LBS-400 both for beam profiling and power measurement?
Answer
Yes, the main function of LBS-400 beam splitter is Beam profiling, however, it performs a 3-way beam splitting:
Less than 0.01% (1/10³) of the beam is reflected in one direction and less than 1% in another while the remaining 99% of the incident laser beam is transmitted.
This allows user to measure one of the 3 beams, depending on available power measurement equipment and setup convenience.

Accessories

Description	Compatibility	Avail.	Price
SP90352 C-Mount Adapter Plate, LBS-400	UNIVERSAL	In Stock	$183
SP90439 L11059 Camera Adapter Plate, LBS-400	UNIVERSAL	In Stock	$135
SP90510 Pyrocam IV Camera Adapter Plate, LBS-400	UNIVERSAL	3 Weeks	$120