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Techincal Notes: Laser Optik

→ Formulary

> 1. Fokussing lenses
   > 1.1 Calculation of the minimum focal diameter
   > 1.2 Calculation of the rayleigh length
   > 1.3 Calculation of the focal diameter for fiber imaging

> 2. Laser Induced Damage Threshold (LIDT)
   > 2.1 Energy- and power density
   > 2.2 Estimate of the LIDT

> 3. Beam expanders
   > 3.1 Calculation of the magnification
   > 3.2 Divergence angle

→ General explanations

> Part number
> Datasheets, technical drawings and CAD-files
> Anti-reflective and low-absorption coatings
> Design wavelength
> Absorption and thermal focus shift
> Working distance
> Diffraction value M²
> Reversed Mode
> Beam diameter
> Apodisation factor
> Spot size (1/e²)
> Rayleigh length
> Fiber imaging

→ Laser inducted damage threshold (LIDT)

> General description
> Energy density / Fluence
> Power density / Irradiance

> Dependencies of LIDT
      > Wavelength
      > Pulse duration τ
      > Pulse repetition rate
      > Laser beam size (diameter or area)
      > Pulse shape
      > Quick reference formula

> Destruction mechanisms
> LIDT of our coatings

→ ƒ-theta lenses

> General explanations
> Lens type recommendation
      > Internal ghosts
      > External ghosts
      > Fused Silica with low-absorption coating
      > Spot expansion for applications with USP lasers
> Optical and mechanical scan angle
> Aperture stop and mirror distances
> Change of the scan lens position
> Spotdurchmesser Diagramm
> Telecentricity
> Black Box files for Zemax OpticStudio®

→ Beam expanders

> General explanations
> Structure
> Selection
> Divergence adjustment
> Zoombeam expanders
> Holding and positioning

→ Asphere design

> Mathematical description
> Technological possibilities
> Guideline for asphere design
     > Prelimary considerations
     > Limitations of local surface curvature
     > Aspherical parameters
     > Edge thickness and oversize
     > Tolerancing via slope error

→ Trapped Ion lenses

> Trapped Ion lenses

< back to technical guide overview

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