Interferometer OptoTL-60/125

Interferometer Opto-TL - 60 / 125-2

The OptoTL-60/125 interferometer is designed to control the accuracy of the shape of optical surfaces, measure their radii and the distortion of wavefronts of lenses.

Typical features of the OptoTL 60/125 interferometer:

  • small dimensions for installation at the production site next to optical machines;
  • specially developed original FastInterf software for real-time measurements in production conditions;
  • original ruler calibration program for radii measurement;
  • presence of two monitors for quick alignment and visual interference pattern;
  • New! the presence of two light sources (coherent and incoherent) to reduce the influence of the reflection of the second surface when testing plane-parallel plates (optional);
  • motorized fast vertical movement by servomotor;
  • motorized vertical movement using a pulse generator with a sensitivity of 30 nm;
  • New! Automatic vertical movement to a predetermined position (from the "cat's eye" position to the confocal position and vice versa) (optional);
  • two standard sizes of test spheres 60 mm and 125 mm with adapter 60/125;
  • translation stage for tilting and moving controlled samples;
  • the presence of base surfaces for the stage and controlled components to simplify alignment when testing a batch of identical parts;
  • device for tilting steep blocks (option);
  • Sintegran base and vertical support for better vibration damping;
  • passive vibration isolation system sufficient for work in industrial conditions;
  • interferometer is supplied on a turnkey basis, complete with everything to set up and get started.

Interferometer parameters OptoTL-60/125

Parameters Value
Optical scheme Fizeau
Position of the optical control axis Vertical
Type of surfaces to be inspected
  • Optical
  • Polished
Shape of controlled surfaces
  • Flat
  • Spherical (with test spheres)
Reflectivity of the tested surfaces
Optical zoom, times 6
Diameter range:
  • flat surfaces
  • spherical surfaces
  • 5 mm - 125 mm
  • 5 mm - 125 mm (determined by the aperture of the test sphere used)
Ranges of permissible radii when measuring the accuracy of the shape of surfaces:
  • convex (CX)
  • concave (CC)
  • 900 mm - 3 mm
  • 3 mm - 1100 mm (determined by a set of reference lenses)
Range of measured radii:
  • convex (CX)
  • concave (CC)
  • 350 mm - 3 mm
  • 3 mm - 350 mm
The accuracy of measuring the radii of surfaces (depending on the nominal value) 2-10 microns.
Measurement error, P-V
  • flat surfaces
  • spherical surfaces
  • λ / 20
  • λ / 10, λ / 20 (optional)
Maximum measurable deviation
Main light source Single frequency laser module 633 nm
Additional radiation source (optional) Laser module 633 nm
Weight of the device
<=180 kg
  • lenght
  • width
  • height
  • <=450 mm
  • <=500 mm
  • <=1000 mm

OptoTL-60 Series Test Sphere Set

Aperture ratio Radius of the test sphere, mm Diameter of the test sphere, mm Optimal range of controlled radii (for maximum numerical aperture), mm Allowable range of controlled radii, mm
Optotl-60-Pl plane infinity 60
Optotl-60/120Pl plane infinity 120 
Optotl-60-1:0.6CX 1:0.6 21CC 34 200CC-20CX 225CC-20CX
Optotl-60-1:0.67CX 1:0.67 24CC 36 200CC-23CX 225CC-23CX
Optotl-60-1:0.8CX 1:0.8 39CC 49 23CX-38CX 200CC-38CX
Optotl-60-1:1.2CX 1:1.2 70CC 58 38CX-69CX 150CC-69CX
Optotl-60-1:1.8CX 1:1.8 110CC 59 69CX-105CX 110CC-105CX
Optotl-60-1:2.7CX 1:2.7 162CC 60 105CX-161CX 50CC-161CX
Optotl-60-1:4CX 1:4 240CC 60 161CX-239CX 30CX-239CX
Optotl-60-1:6CX 1:6 360CC 60 239CX-359CX 150CX-359CX
Optotl-60-1:9CX 1:9 540CC 60 359CX-540CX 330CX-540CX
Optotl-60-1:12CX 1:12 720CC 60 540CX-719CX 510CX-719CX
Optotl-60-1:15CX 1:15 901CC 60 719CX-900CX 690CX-900CX
Optotl-60-1:3.3CC 1:3.3 200CX 60 201CC-401CC 201CC-410CC
Optotl-60-1:6.6CC 1:6.6 400CX 60 401CC-601CC 401CC-610CC
Optotl-60-1:10CC 1:10 600CX 60 601CC-811CC 601CC-811CC
Optotl-60-1:13.5CC 1:13.5 810CX 60 811CC-1020CC 811CC-1020CC

OptoTL-125 Series Test Spheres Set (use is possible only with the OptoTL60 / 125 adapter)

Aperture ratio Radius of the test sphere, mm Diameter of the test sphere, mm Optimal range of controlled radii (for maximum numerical aperture), mm Allowable range of controlled radii, mm
Optotl-125-Pl plane infinity 125 
Optotl-125-1:0.65CX 1:0.65 44CC 68 200CC-43CX 220CC-43CX
Optotl-125-1:0.95CX 1:0.95 90CC 95 44CX-89CX/td> 150CC-89CX
Optotl-125-1:1.5CX 1:1.5 155CC 103 89CX-154CX 100CC-154CX
Optotl-125-1:3.3CX 1:3.3 396CC 120 154CX-395CX 50CX-395CX