VFI-2000 Interferometer

The VFI-2000 is an interferometric inspection system specifically designed for checking the surface quality and flatness of your cleaved or polished fibers. The VFI interferometer has proven itself in Research, Production and QA environments.

Superb optical quality

We pride ourselves on the crisp end-face images which the VFI-2000 generates. The two modes of operation - inspect and fringe - allow users to check both the flatness and end quality of a cleaved or polished fiber end with just one insertion. The VFI-2000 provides the largest field of view in the VFI, and therefore has a lower resolution.

Flexible software

The VFI comes with an efficient software package containing controls to switch between fringe and inspect mode built in. It also allows users to grab and save images for later use. The report generator enables users to include up to 20 cleave images in one report along with comments. Other features include – intensity line profile, intensity histogram, auto-optimisation of intensity, end angle estimation, radius of curvature estimation, psuedo-color rendering and review of stored images.

VFI Additional Options

Arden Photonics fiber holders are precision engineered using stainless steel, ensuring the highest levels of accuracy and repeatability. Our holders hold the fiber in a well-aligned V-groove using a soft but secure magnetic clamp, providing repeatable and reproducible results.

The holders come in a variety of sizes to accommodate a wide range of fiber diameters, up to 2mm. We can also produce angled fiber holders designed for use with fibers that have a large cleave angle. The angled holders hold the fiber at a specified angle in order to null the cleave angle so that an optimum platform is provided for analysing the features of the fiber end face.

We have also developed a new style of fiber holder, the “dual-style” holder, that is fully inter-operable with the Arden Photonics FGC Fiber Geometry System for measuring the geometry of standard and specialty fibers.

Adapter plates are available for use with the dual-style holders so that they can be used with Fujikura cleavers and splicers, allowing the holder to be transferred to the VFI from a Fujikura cleaver, or from the VFI to a Fujikura splicer, without even having to adjust the position of the fiber in the holder. Alternatively, the adapter plates allow standard Fujikura fiber holders to be used directly with the VFI. If you wish to use another type of holder then we may be able to design an adapter plate to suit your needs.

In addition, the standard fiber handling stage of the VFI can be replaced with a laterally adjustable stage designed for quickly and efficiently imaging ribbon fibers.

After sales services

Contact Arden Photonics for information on our comprehensive packages (extended warranties, calibration programs, software upgrades, etc.) and per-incident services (repair, calibration, etc.)

Technical Specification
Latest Software
Document Downloads
Ordering Information
Field of View 2000 µm maximum with x1.5, x2, x3 and x6 digital zoom
Dimensions 240(W) x 240(D) x 90(H) mm
Weight 3 kg
Image sensor 1/1.8 inch CMOS array, 12-bit, 6.4 MP
Power supply 12 V in-line power supply
Camera sensor size 3088 x 2076 px, 2.4 µm square pixels
Fringe resolving power 2 μm/fringe
Maximum frame rate >10 fps
LED wavelength 525 nm
Accuracy up to 2° <0.1°
Connection to computer USB 3.0 (USB Type C to USB A: 1 m cable supplied)
Operating temperature 10 – 30 °C
Operating systems support Windows 7/8/10 64bit
Computer requirements 2 GB RAM; USB 3.0 port; 64bit

Release v5.1 of VFI software is applicable to users of the VFI-200, the VFI-1200 and the VFI-2000.

We strongly recommend all applicable users to upgrade. Please contact vfiupgrade@ardenphotonics.com to get a quotation.

Please note – the predecessor to the VFI was the VF-20. VF-20s are not supported by the Version 5.1 software. If you have a VF-20 and you want to take advantage of the latest software, we recommend to book an evaluation of the new VFI-200 or VFI-1200 as soon as possible.

Main features:

Feature Benefit
Auto measure function 1 click measurement providing fiber diameter, end angle and edge damage percentage data. Great for the production environment.
USB 3.0 camera support Improve software speed and responsiveness, while maintaining great image quality
Pass/Fail indicators Gives technicians easy to use quantifiable pass fail criteria
Calibration report Newly introduced calibration report to make user calibration even easier.
Angle orientation measurement Adds measurement of the orientation of the angle with respect to the top edge of the field of view, allowing the orientation of the angle to be compared against other features on the image
2 decimal point precision measurement of angle to 2 decimal points

Screen shots

VFI v5.1 in “Fringe” mode

VFI v5.1 in “Inspect” mode

VFI v5.1 with polished fiber

Software Version Feature Guide

Software version number V 2.2 V 3.0 V 4.0 V 4.2 V5.0 V5.1
Release date 01/12/2011 29/01/2014 01/07/2015 06/01/2016 02/03/2018 07/06/2019
User Manual Issue #  11 16 19 21 21
Intensity histogram
False colour display
Magnification calibration utility
End angle calculation
Camera exposure control/optimise
Report generator
Camera gain control
Camera gamma control
Auto detect fringe width
Cursor to change ROI
Easy switching between “Fringe” and “Inspect” mode
JPG image output format
Auto detect linear fringes using FT
Support Windows 8
Support 32-bit and 64-bit processors
Fine adjust of ROI using mouse
New keyboard shortcuts
Measure radius-of-curvature of polished fibers
Fully automated Fringe/Inspect mode switching
Improved auto-exposure
Full-screen image mode
Export reports to Microsoft Excel
Improved image measurement tools
User interface improvements
Windows 10 Support
On-screen scale bar
Up to 20 images per report
VFI-2000 Compatibiltiy
USB-3.0 camera support
Pass/Fail indicator
Calibration report
Angle orientation measurement
2 decimal point precision
Part number Description
VFI-2000 Interferometric inspection system for fibers with diameters from 400 to 2000 μm. Includes VFI-2000 optical unit; VF-H0/0400 fiber holder for 400 μm fibers; VFI-FTK400 fiber samples; PC software; USB cable; power supply. Computer not included.
VFI-2000-RS Interferometric inspection system for fibers with diameters from 400 to 2000 μm and additional ribbon stage with lateral adjustment capability. Includes VFI-2000 optical unit; Lateral adjustment stage; fiber holder for 400 µm fibers; VFI-FTK400 fiber samples; PC software; USB cable; power supply. Computer not included.
Fiber Holders
VF-H0-xxx Arden fiber holder for xxx µm fiber, perpendicular cleave
VF-H0-xxx-D Dual-style Arden VFI fiber holder for xxxµm fiber, perpendicular cleave (requires adapter plate)
VF-H08-xxx Arden fiber holder for xxx µm fiber, 8 degree cleave
VF-Annulus 9-sided annulus used with fiber holder in order to present the fiber to the VFI at a range of integer angles (from 4 to 12 degrees)
Please note: for VFI-2000 standard holder sizes include 400, 600, 800, 1000, 1250, 1500 and 2000 with custom diameters available with extra charge.
Adapter plates
VF-AP-3 Adapter plate for use with dual-style Arden holders and Fujikura holders. For use with fiber protrusion of 3 mm from end of holder
VF-AP-12.5 Adapter plate for use with dual-style Arden holders and Fujikura holders. For use with fiber protrusion of 12.5 mm from end of holder for direct use with FGC system or Fujikura cleavers and splicers (not suitable for fibers under 200 µm in diameter)
Other options
VF-CC-01 Rigid carrying case for VFI-2000, VFI-1200 or VFI-200
VFI-UEW2 VFI extended warranty covering parts and labour for 2 years from purchase, return to base. Cover excludes camera.
VFI-UEW3 VFI extended warranty covering parts and labour for 3 years from purchase, return to base. Cover excludes camera.
VFI-UEW4 VFI extended warranty covering parts and labour for 4 years from purchase, return to base. Cover excludes camera.
VFI-UEW5 VFI extended warranty covering parts and labour for 5 years from purchase, return to base. Cover excludes camera.
VFI-FTK400 VFI fiber samples, 400 µm diameter, for checking VFI-1200 alignment and calibration.