FFV

The FFV (free form verifier) system provides quick and clear power, cylinder, and difference maps for free-form lenses. It translates deviations into go/no-go parameters and decision, saving valuable time and avoiding unnecessary operator analysis.

System for Spectacle Lenses

FFV

The FFV (free form verifier) system provides quick and clear power, cylinder, and difference maps for free-form lenses. It translates deviations into go/no-go parameters and decision, saving valuable time and avoiding unnecessary operator analysis.

System for Spectacle Lenses

Send Samples

Performance

4 SEC

Measurement time

±0.03D

Accuracy

0.02D

Repeatabillity

Production Stage

FFV

Lens types

Spheric
Aspheric
Toric
Atoric
Front curves
Polarized
Free form
Progressive
Single Vision

Measurement capabilities

Sphere power
Sphere power
Cylinder
Cylinder
Axis
Axis
Addition-1
Addition

FFV

Specification

Working Principle
Moire Deflectometry
Type of lenses
SV, Bifocal,PAL, (Freeform or conventional),Toric.
Production Stage
Glass molds ,Blanks, polished lenses, edged lenses.
Capabilities
Power, Cylinder, Axis, Addition, Comparison to theoretical design
Measurement speed
4 second
Power range
-10D to +10D
Cylinder range
0 to 7D
Power and cylinder accuracy
±0.03D
Repeatability
±0.02D (99% confidence level)for glass calibration standards
Field of view
70mm
Wavelength
525nm
Lateral resolution
0.3mm
Power supply
12VDC
Operation temperature
-15° to +30 C°
External dimensions (L x W x H)
270X200X350mm
Weight
6kg

Gallery

Go lens
Go lens
Rejected lens
Rejected lens
Multifocal go lens
Multifocal go lens
Analysis go lens
Analysis go lens
Report go lens
Report no-go lens
Report no-go lens
Unique benefits of the FFV
Automated Go/No-Go decisions save operator analysis time and ensure consistent production.
Fast measurement and mapping with a 6-second cycle.
Instant display of the pixel-to-pixel difference between theoretical and manufactured lenses.
Enable detection issues in the lens design

An answer to your question

More questions?

Unlike generator software that shows what the system “intended” to produce, FFV directly measures what was actually fabricated on the lens surface. It compares the true optical performance to the theoretical design file (e.g. SLF, DXF), allowing users to catch critical deviations including data misfeeds, polishing errors, or surface asymmetries that the generator itself won’t report
Yes. FFV can analyze fully processed lenses, including those that have undergone edging, lasering, or alignment marking. As long as the surface remains optically transparent, the system accurately reads the form making it ideal for final QA after edging or mounting.
Instead of flagging raw surface noise, FFV compares each data point directly against the theoretical model. This enables it to identify functional optical errors while ignoring harmless cosmetic artifacts. It classifies deviations by zone, showing whether the anomaly affects critical vision areas or falls within acceptable optical thresholds.
FFV offers a streamlined operator mode enabling scan, comparison, and verdict in just 4 seconds per lens. It doesn’t require the operator to interpret complex maps. For advanced users, a supervisor mode unlocks deeper analysis, but routine operation is simple and fast, suitable for floor-level staff.

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