The KEP Series Laser Beam Analyzers are an extension to our laser beam profilers, producing the 3D intensity reconstruction from CCD cameras, while being capable of measuring very small spots at high resolution and huge dynamic range.
The measurement technique is based on a multiple scanning knife-edge technology, combined with a tomographic image reconstruction for the creation of the 2D/3D display. When the drum spins, the knife-edges cut across the beam in an orthogonal plane to the direction of propagation. A stationary large detector inside the spinning drum measures light intensity. For attenuation, when needed, a built-in distortion free optical filter is inserted between the spinning drum and the detector. Each scanning knife-edge is oriented at a different angle on the drum and moves across the beam path in a different direction as the drum rotates. Consequently, during a single rotation of the drum, the instrument generates a set of profile curves, each representing the intensity profile of the beam from a different direction. This data is the input for the tomographic reconstruction algorithm to generate the 2D/3D intensity profile of the beam.
The Beam Analyzers are offered in two types of measuring heads:
Model KEP-7 uses seven individual knife-edges, providing more accurate ...

The KEP Series Laser Beam Analyzers are an extension to our laser beam profilers, producing the 3D intensity reconstruction from CCD cameras, while being capable of measuring very small spots at high resolution and huge dynamic range.
The measurement technique is based on a multiple scanning knife-edge technology, combined with a tomographic image reconstruction for the creation of the 2D/3D display. When the drum spins, the knife-edges cut across the beam in an orthogonal plane to the direction of propagation. A stationary large detector inside the spinning drum measures light intensity. For attenuation, when needed, a built-in distortion free optical filter is inserted between the spinning drum and the detector. Each scanning knife-edge is oriented at a different angle on the drum and moves across the beam path in a different direction as the drum rotates. Consequently, during a single rotation of the drum, the instrument generates a set of profile curves, each representing the intensity profile of the beam from a different direction. This data is the input for the tomographic reconstruction algorithm to generate the 2D/3D intensity profile of the beam.
The Beam Analyzers are offered in two types of measuring heads:
Model KEP-7 uses seven individual knife-edges, providing more accurate measurement of the true beam shape and dimensions by gathering data from all 7 scans, while Model KEP-3 uses only three knife-edges, and are recommended for smaller beam as well as for near-Gaussian beam measurements. The more knife-edges, the greater the level of detail obtained. For a beam distribution that is significantly non-Gaussian the KEP-7 would reconstruct a plot that closely matches the real beam profile.