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Parameter Value
Type Lens with double focal length with a common focal plane suitable for powerful lasers and changing the diameter of the laser spot without reinstalling the optics.
Spectral range, nm 1030 – 1100
Focal Length (f ')
Back focal length s (s' F')
f‘, ìì s’F’, ìì
127   (5") 168
178   (7") 151
254   (10") 168
1/e² diameter of input beam, mm <20
Clear diameter, mm 31
Laser power äî 3 êÂò (CW)
Fastening Thread M58x1
Diameter, mm 126
Length, mm 197
Other properties
  • Single focal plane for two focal lengths of 127 and 254 mm
  • Optical design with diffraction-limited quality.
  • Change of the laser spot size by moving the inner lens without changing the entire lens to avoid dust on the optics when using.
  • At intermediate focal lengths - some, up to 15 mm, shift of the focal plane position, see above data for f '= 178 mm (7 ").
  • Compensation for thermal focal shift by moving the movable lens.
  • Other combinations of working magnifications are available upon request.
  • Mechanical design is adaptable.
Specifications are subject to change upon request.