Micro Focus Optics series 5M

for transforming a collimated beam into a micro focus spot

Micro Focus Optics series 5M
Micro Focus Optics series 5M
Micro Focus Optics series 5M
Micro Focus Optics series 5M


Micro focus optics used for focussing the collimated radiation of a fiber collimator.
  • Attachment optics for fiber collimators type 60FC with outer diameter Ø 12mm
  • Choice of aspheres, achromats or singlet lenses
  • Various optics for UV - IR
  • Amagnetic housing made from Titanium on request


Micro Focus Optics are used in order to generate small laser spots from the collimated radiation of a fiber collimator.
For spots < 10 times the mode field MFD of the fiber, a good quality spot can no longer be achieved by simply refocusing the collimation optics. Instead, a combination of collimation and focusing optics is needed. The size of the spot and its Rayleigh range is determinded by the fiber properties and by the focal lengths of the fiber collimator and of the micro focus optics. For single-mode fibers the Gaussian intensity distribution and beam shape are maintained.
For the fiber collimators series 60FC with an outer diameter Ø 12 mm Schäfter+Kirchhoff offer Micro Focus Optics with focal lengths in the range f 2.7 mm - 325 mm.
There is a large variety of aspheres, duplet or singlet optics with AR coatings from the UV to the IR wavelengths range.

In order to change the working distance of the Micro Focus Optics the lens position of the adjacent collimator has to be readjusted.

Housing material:
As standard the housing of the Micro Focus Optics is made of nickel silver.
For amagnetic fiber collimators Schäfter+Kirchhoff offers Micro Focus Optics with housings made of titanium.

Order Options

Wavelength Range  AR CoatingCorrection  Focal Length [mm]                                                                                                     6088150325
  350 -   460 nm 52Monochromatic x                   
  400 -   600 nm01 Monochromaticxxxxxx xx xx         
  600 - 1050 nm02 Monochromaticxxxxxxxx xx         
  650 - 1150 nm07 Monochromatic   xx x             
1050 - 1550 nm03 Monochromaticxxxxxxxx xx         
1300 - 1750 nm45 Monochromaticx  xx x  x x x         
1750 - 2150 nm09 Monochromatic   xx               
  390 -   670 nm 33 Monochromatic      x x xx        
  630 -   980 nm10 Monochromatic      x x xx        
  980 - 1550 nm08 Monochromatic      x x xx        
  630 -   980 nm10 Achromatic        x           
  400 - 1000 nm24 Achromatic         x  xxxxx   
  420 -   700 nm26 Achromatic         x  xxxxx   
  750 - 1550 nm37 Achromatic        xx  xxx     
  390 -   670 nm 33 -               x xxx
  630 -   980 nm10 -               x xxx
  980 - 1550 nm08 -               x xxx