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Scanning Slit

Laser Focus World - September 2015

Laser Focus World - September 2015


beam characterization
The data produced by canning a slit or
knife edge in front of a detector is not
limited in resolution in the same way
that a pixel-based camera image is; thus,
scanned slits or knife edges excel at measuring small and/or focused beams.

Microsoft Word - Understand Different Laser Beam  Rev 1 Final.doc

Microsoft Word - Understand Different Laser Beam Rev 1 Final.doc

…Like the slit scanner, the accuracy of a scan depends upon the
geometry of the beam. For best results, the beam should be
circularly symmetric and near Gaussian.
Within this category Coherent offers a knife-edge
instrument called the BeamMasterTM.
Tomographic Scanning

Properties-of-Structured-Light-Application-Note.pdf

Properties-of-Structured-Light-Application-Note.pdf

…average intensity over a
give region (see Figure 7). Traditionally, this is taken over the central 80% of the projected line, thus eliminating
any mismatch at the edge of the line. This measurement uses a slit detector to integrate the power as it scans the
Figure 5
Figure 6

ModeMaster PC User Manual

ModeMaster PC User Manual

…diameter measurements needed to analyze beam propagation
include the following:
· Moving knife-edge
· Moving pinhole
· Moving slit
· Variable diameter aperture
Each method has its own speed and accuracy characteristics that
depend in different ways on whether or…

Mode-Master-Whitepaper FORMFIRST.pdf

Mode-Master-Whitepaper FORMFIRST.pdf

…oriented at 90° to each other on a rotating drum,
together with a single element detector. As the drum
spins, the knife edges rapidly scan the beam in
orthogonal directions, and the transmitted light is
measured. This signal data is sent to the computer
which derives the…

COHR MedicalOCTprobe DS 0619.pdf

COHR MedicalOCTprobe DS 0619.pdf


Coherent has the capabilities to measure the optical beam characteristics including working distance and beam waist.
We have both scanning slit and camera based equipment to measure beam parameters.
Working Distance: Through the customized design of the distal tips, the working…

Whitepaper LMC PM-Pro LAM updtd 3 05 19.pdf

Whitepaper LMC PM-Pro LAM updtd 3 05 19.pdf

…that compromise their use in this application. Specifically, laser mode
measuring instrumentation usually operates by sequentially scanning a slit or aperture across
the laser beam at multiple distances from the source. This allows a full picture of the propagation
characteristics…

COHERENT LMC 2016-2017 Catalog .pdf

COHERENT LMC 2016-2017 Catalog .pdf

…the more common
types of beam profilers, which use two orthogonal knifeedges or slits to scan the beam profile.The BeamMaster
model BM-7 uses seven individual knife-edges on a rotating
drum to scan the beam through seven different axes in a
single rotation.This provides more…

Industrial Photonics - July 2014

Industrial Photonics - July 2014

July 2014 Industrial Photonics 25
other materials are transparent in the visible but not in
the UV. Once the pulse energy is above a certain threshold, these materials can be machined using ultraviolet
light. The ability to do so is of particular interest to the
makers of…

Excimer LLO 2014.pdf

Excimer LLO 2014.pdf


condenser lens in the beam path.
The short axis can be focused onto a slit mask. The slit
can clip the short axis of the beam profile, ensuring steep
fall-off at the edges of the line beam. The slit plane is then
imaged by a cylindrical doublet lens that reduces the short…

Mode Master White Paper July 2011 final.pdf

Mode Master White Paper July 2011 final.pdf

…oriented at 90° to each other on a rotating drum,
together with a single element detector. As the drum
spins, the knife edges rapidly scan the beam in
orthogonal directions, and the transmitted light is
measured. This signal data is sent to the computer
which derives the…