Lens testing

OFH maintains a small meteorology lab to test imaging and non-imaging lenses. Clients sometimes request testing of off-the-shelf optics or custom designs that require performance validation after manufacturing. OFH uses the ISO 12233:2000 'Slanted Edge' method for our MTF test and also has a USAF test for visual quality inspection.

Measurements made include:  

  •     EFL and F/#

  •     Back focal length

  •     Astigmatism

  •     Field Curvature

  •     Distortion

  •     Transmission

  •     Relative illumination

  •     Line of Sight

 

Lenses that can be tested:

  •    Clear diameter   6-40 mm

  •    Length of lens 8-250 mm

  •    NA</= 0.5

  •    Focal length 4-100 mm

  •    Wavelength range 400-1000 nm

  •    Field of view +/- 45 deg.

  •   Refractive Collimator 400 mm EFL achromat,

  •    Light Source 1 % uniformity LED with homogenizer

 

 

USAF Resolution Test

USAF test sample image

USAF test sample image

MTF testing

MTF testing

Sample MTF test

Sample MTF test