Product Overview
Software
Technical Data
Upgrades & Accessories
Knowledge Base
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Implementing the ISO-compliant Intraocular Lens (IOL) inspection in your production

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Implementing ISO-Compliant IOL
Inspection in Your Production

OptiSpheric®

The standard for comprehensive testing of optomechanical parameters of lenses

OptiSpheric® is the industry standard for non-contact inspection of basic axial optical and mechanical parameters and is used worldwide to fully measure and qualify single lenses – as well as intraocular lenses – and optical systems. The world’s largest laboratories and major optics manufacturers rely on TRIOPTICS optical inspection systems.

They use the OptiSpheric® for reliable and reproducible axial measurement of effective focal length, back focal length, flange focal length, radius of curvature and modulation transfer function (MTF). Different product variants are available that are optimized for different applications and simplify the measuring process: manual or automated processes in different measuring ranges, the combination with OptiCentric®, measurement at further wavelengths and in-air and in-situ measurement for intraocular lenses. The easy-to-use software allows accurate measurement of the test samples at any time.

Product Overview

OptiSpheric® MAN

Manuel measurement
OptiSpheric-MAN

The manual OptiSpheric® MAN allows easy measurement of optomechanical lens and objective properties.

  • Manual focusing
  • Focal length measurements of up to ±250 mm
  • Cutting width measurement as well as measurement of the contact dimension and the radius of curvature from ±5 mm up to ±250 mm

OptiSpheric® AF

The standard for testing lenses
OptiSpheric®-AF

The automated OptiSpheric® AF enables fast and reliable test results in automated test sequences.

  • High precision autofocus
  • Cutting width measurement as well as measurement of the contact dimension and the radius of curvature from ±5 mm up to ±490 mm
  • OptiSpheric® AF 500:

    • Focal lengths from -450 mm to +500 mm.
    • Cut-off width, contact dimensions and radius of curvature from ±5 mm to ±490 mm
  • OptiSpheric® AF 1000

    • Focal lengths up to ±1000 mm.
    • Focal length, contact dimensions and radius of curvature from ±5 mm up to ±490 mm.
  • OptiSpheric® AF 1500

    • Focal lengths up to ±1500 mm.
    • Focal length, contact dimensions and radius of curvature from ±5 mm to ±790 mm
  • OptiSpheric® AF 2000

    • Focal lengths up to ±1500 mm.
    • Focal length, contact dimensions and radius of curvature from ±5 mm up to ±990 mm.

OptiSpheric® AF 500 INV

Measure EFL & FFL fast and accurate
OptiSpheric® AF 500 INV

The OptiSpheric® AF 500 INV is the specialist for measuring camera lenses due to its inverse design.

  • Automated focusing
  • Focal length measurement up to +500 mm

  • Cutting width measurement as well as measurement of the contact dimension and the radius of curvature from +5 mm up to +490 mm
Optimized for the production of camera lenses, the OptiSpheric® AF 500 INV from TRIOPTICS provides a compact system that is specifically designed for measuring flange focal length and effective focal length. The secure accommodation of lenses up to 300 mm long by means of customer-specific sample receptacles – usually a bayonet connection – and the Vibration-damped granite table provide the ideal prerequisites for precise measurement results

  • Quality control of lenses up to 300 mm long

  • Compressed air dampened granite table allows for measurements independent of the environment

  • High measurement accuracy of BFL, FFL and ROC through the use of precise length measurement

  • High repeatability through the use of exact linear axes

  • Stable and precise placement of the camera lens through the use of customer-specific bayonet connections and manual XY displacement

  • Fast intermediate testing of single elements via a self-centering, customer-specific and easily exchangeable holder

  • Compact, sturdy and independent measurement station without externally moving parts for secure handling

OptiSpheric® IOL R&D

Comprehensive testing of IOLs in R&D
OptiSpheric® IOL R&D

The OptiSpheric® IOL R&D allows the testing of intraocular lenses in research and development.

  • Quick testing of single lenses in just 12 seconds
  • ISO-compliant measurement of hydrophobic and hydrophilic lenses in air or in a heatable in situ eye model according to ISO 11979
  • High measurement accuracy of 0.3 % for all types of intraocular lenses
The products of the OptiSpheric® IOL series represent the industry standard for intraocular lens inspection. Customers rely on the high-precision measurements in research and development as well as in production. The transparent measuring process allows the effortless determination of important parameters such as:

  • Power (sphere, cylinder und addition)

  • Effective focal length (EFL)

  • Modulationtransferfunction (MTF and 2D-MTF)

  • Pointspreadfunction (PSF and LSF)

  • Orientation of the cylinder axis, orthogonality of the optical axis and deviation of the markers from the optical axis

  • Radius of curvature (in air)

  • Back focal length (BFL, in air)

  • MTF focus scan („Through Focus Scan“)

  • Energy distribution (MTF area)

  • Streh ratio

  • Visual inspection

The measuring systems are universally applicable for all types of intraocular lenses (monofocal, spherically aberrated lenses (EDOF), multifocal, trifocal, toric and aspherical IOLs (each diffractive, refractive or sector lens)) and allow the traceability of the measurement results to international, independent testing institutes such as NPL and NIST.

OptiSpheric® IOL PRO 2

Fully automated IOL measurement
OptiSpheric® IOL PRO 2

OptiSpheric® IOL PRO 2 enables the inspection of intraocular lenses in production.

  • High throughput with up to 100 lenses per measurement
  • ISO-compliant measurement of hydrophobic and hydrophilic lenses in air or in a heatable in situ eye model according to ISO 11979
  • High measurement accuracy of 0.3 % for all types of intraocular lenses
The products of the OptiSpheric® IOL series represent the industry standard for intraocular lens inspection. Customers rely on the high-precision measurements in research and development as well as in production. The transparent measuring process allows the effortless determination of important parameters such as:

  • Power (sphere, cylinder und addition)

  • Effective focal length (EFL)

  • Modulationtransferfunction (MTF and 2D-MTF)

  • Pointspreadfunction (PSF and LSF)

  • Orientation of the cylinder axis, orthogonality of the optical axis and deviation of the markers from the optical axis

  • Radius of curvature (in air)

  • Back focal length (BFL, in air)

  • MTF focus scan („Through Focus Scan“)

  • Energy distribution (MTF area)

  • Streh ratio

  • Visual inspection

The measuring systems are universally applicable for all types of intraocular lenses (monofocal, spherically aberrated lenses (EDOF), multifocal, trifocal, toric and aspherical IOLs (each diffractive, refractive or sector lens)) and allow the traceability of the measurement results to international, independent testing institutes such as NPL and NIST.

Request OptiSpheric®
OptiSpheric

Software

OptiSpheric® Software

Simple and intuitive operation

The proven OptiSpheric® software meets the requirements of optical manufacturing in terms of simple and intuitive operation. It fulfills the highest demands for measurement speed and precision while providing consistent, reliable measurement results. The standard measuring sequences are supplemented by the possibility of configuring individual measuring sequences.

The software is convincing in many respects:

  • Comprehensive, reliable functionalities that can be used both in production and in research and development
  • Optimization of the test sequence through customer-specific programming of measurement and analysis sequences using script tooling – ideal for R&D laboratories

Fast working thanks to optional automated positioning of the appropriate reticle for the current application

Usage for IOL measurement

The software has been specially adapted for use in the field of IOL measurements.

Here it offers:

  • Simple operation through predefined measurement processes for various IOL types
  • Easy system setup with just a few clicks to start the fully automated alignment and measurement of batches with up to 100 IOLs
  • Flexible, modular menu navigation that can be set up for different users (R&D, production, administrator)
  • Easy-to-understand measurement results with graphics displays and depiction of the camera image in real time

  • Software-based correction of the refractive power in the event of temperature differences, defocusing and/or spherical correction

  • Efficient data input and output by means of database communication and optional link to barcode reader

  • Different modes permit, for instance, the preparation of individual measurement scripts

Technical Data

ParameterOptiSpheric®
Manual focusing,
automated measurement
OptiSpheric®
Auto Focus 500
automated measurement
OptiSpheric®
Auto Focus 1000
automated measurement
OptiSpheric®
Auto Focus 1500
automated measurement
OptiSpheric®
Auto Focus 2000
automated measurement
Lens diameter3 mm ... 35 mm
optional: 5 mm ... 75 mm
3 mm ... 35 mm
optional: 5 mm ... 75 mm
5 mm ... 75 mm
optional: 3 mm ... 35 mm
5 mm ... 75 mm
optional: 3 mm ... 35 mm
5 mm ... 75 mm
optional: 3 mm ... 35 mm
Clear aperture28 mm28 mm48 mm48 mm48 mm
EFL (Effective Focal Length)+5 mm … +250 mm
-5 mm … -250 mm
+5 mm … +450 mm
-5 mm … -450 mm
+5 mm … +1,000 mm
-5 mm … -1,000 mm
+5 mm … +1,500 mm
-5 mm … -1,200 mm
+5 mm … +2,000 mm
-5 mm … -1,500 mm
Measurement range
BFL and radius
±5 mm … ±250 mm±5 mm … ±490 mm±5 mm … ±490 mm±5 mm … ±750 mm±5 mm … ±1,000 mm
MTFabsolute MTF-Test:
5 mm … 50 mm EFL
absolute MTF-Test:
5 mm … 50 mm EFL
absolute MTF-Test:
5 mm … 50 mm EFL
absolute MTF-Test:
5 mm … 50 mm EFL
absolute MTF-Test:
5 mm … 50 mm EFL
Download Technical Data
ParameterOptiSpheric® IOL R&DOptiSpheric® IOL PRO 2
Power range• Water labelled, measured in air: -16.5 D ... -1 D and +1 D ... +41 D
• Water labelled, measured in water: -50 D ... -2.5 D and +3 D ... +125 D
• Water labelled, measured with model cornea: -200 D ... +150 D
• With model cornea: -200 D ... 0 D and 0 D ... +150 D
• Without model cornea: -50 D ... -2.5 D and +3 D ... +125 D
Power accuracy0.3 %0.3 %
MTF range• Water labelled, measured in air: +7 D ... +41 D
• Water labelled, measured in water: +20 D ... +125 D
• Water labelled, measured with model cornea: -45 D ... +45 D
• With model cornea: -200 D ... 0 D and 0 D ... +150 D
• Without model cornea: -50 D ... -2.5 D and +3 D ... +125 D
MTF accuracy±2 % (0 ... 300 lp/mm)±2 % (0 ... 300 lp/mm)
Apertures diameter1 mm ... 6 mm with steps of 0.5 mm1 mm ... 6 mm with steps of 0.5 mm
Radius and BFL accuracy20 µm10 µm
Max. batch size1100
Sample positioningManualAutomatic
Dimensions (h x w x d)1,120 mm x 560 mm x 580 mm1,850 mm x 860 mm x 860 mm
Weight45 kg300 kg
TypeTable top deviceStand alone
Download Technical Data OptiSpheric® IOL
ParameterOptiSpheric® AF 500 INV
Lens diameter 1)5 mm … 75 mm
EFL (Effective Focal Length), relative MTF: range+5 mm … +500 mm 3)
EFL, relative MTF: measurement accuracy 2)5 mm … 25 mm: 0.1 % … 0.3 %
25 mm ... 500 mm: 0.03 % … 0.1 %
500 mm … 1000 mm: 0.05 % … 0.3 %
EFL, relative MTF: measurement timeFirst measurement: 5 s … 8 s
consecutive measurements : 3 s … 5 s
BFL, FFL, radius: range+5 mm … +490 mm
BFL, FFL, radius: repeatability 2)0.02 % ... 0.2 %
BFL, FFL, radius: accuracy 2)0.03 % ... 0.3 %
MTF up to 150 lp/mm: range5 mm … 75 mm EFL (Effective Focal Length)
MTF up to 150 lp/mm: test modeAxial MTF measurement
automatic auto focus
MTF up to 150 lp/mm: spatial frequency0 lp/mm … 500 lp/mm
MTF up to 150 lp/mm: repeatability 2)1 %
MTF up to 150 lp/mm: accuracy 2)2 %
Wavelength546 nm 4)
Dimensions (h x w x d)1,950 mm x 1,205 mm x 700 mm
Weight280 kg
TypeStand alone device

1) Sample holder for other lens diameters upon request
2) Depending on NA of sample; higher NA reduces accuracy; sample NA should be smaller than NA of the measurement head
3) Negative measurement range upon request
4) Other wavelengths (e.g. 480 nm, 658 nm) upon request

Download Technical Data OptiSpheric® AF
Request OptiSpheric®

Upgrades & Accessoires

Lens holders

  • Self-centering holders for lenses with an outer diameter from 3 mm to 35 mm with X-Y shifting device
  • Self-centering holder for lenses with an outer diameter from 5 mm to 75 mm with X-Y sliding device

Measuring range and referencing

  • Further optical attachments for the extension of the measuring ranges
  • The OptiSpheric® is also available as a module for the OptiCentric®.
  • Reference lenses

Illumination

  • Additional light source for simplified BFL, FFL and curvature radius measurement
  • Filter for measurement at further wavelengths

Self-centering seat for lens holder for measurement in air

Lens holder with various aperture sizes (3 mm standard, 1 mm – 6 mm optional)

Upgrades_Mirror_Redirecting_Mirror

Advanced model eye including replaceable model cornea, heating, X-Y displacement for cornea and lens, tilting adjustment by up to 5° to simulate a tilting positioning after implantation

Tray with self-centering holder for the measurement of single lenses and glass reference lenses in air

Tray for the measurement of 100 lenses in air

Upgrades_Mirror_Redirecting_Mirror

Model eye for in situ testing of single lenses with a tray

Upgrades_Mirror_Redirecting_Mirror

In situ tray for the measurement of 100 lenses

Upgrades_Mirror_Redirecting_Mirror

SortStation IOL for simple, fast and safe execution of all work steps upstream and downstream of the measurement:

  • Loading of the trays:
    The ideal positioning of the lenses is easily visible thanks to optimum illumination.
  • Sorting of the lenses after the measurement:
    The test results are automatically transferred to the display and made visible directly at the location of the samples. The fulfilment of the pass/fail criterion is displayed in a green/red color scheme and the reliable assignment of each lens is made possible.
Upgrades_Mirror_Redirecting_Mirror

WorkStation IOL
The Workstation IOL is a complete workplace in which the Sortstation IOL is integrated. With its storage space for unused trays and other accessories, the Workstation IOL keeps everything in order. Drawer inserts support safe and organized storage. With the corresponding holder, the in-situ trays can be easily and safely set up for drying.

Upgrades_Mirror_Redirecting_Mirror

Customized lens holder

Upgrades_Mirror_Redirecting_Mirror

Others:

  • Heating for model eye
  • Corneas of various designs, e.g. with spherical aberration
  • High-performance LED (light source)
  • Customized lens holder for tray
  • Filters for measurements at various wavelengths and photopic lighting
  • High-resolution camera

Knowledge Base

Measurement of ophthalmic lenses

Measurement of power, add power and cylinder in compliance with ISO 11979

The OptiSpheric® IOL bench is using the imaging of an object through the lens under test. The resulting image is analyzed in order to evaluate the parameters of the lens (Power, Imaging quality through MTF calculation, energy distribution, Strehl ratio, and more…). Using this imaging technique is similar to realistic conditions and allows testing any type of IOLs designs.

Different types of target are projected to infinity through a collimator. The lens under test gives therefore an image of the target in its focal plane. A measuring CCD microscope is used for analyzing the image by the help of an autofocus mechanism. The instrument also includes different aperture sizes and different imaging objectives chosen automatically by the system according to the power of the lens under test. The wavelength used for the measurement is 546 nm as requested in the ISO 11979 standard.

More knowledge for experts

This article inspired you? Are you looking for further knowledge transfer?
Then you might also be interested in the following topics …

Power measurement principle

Power, add power and cylinder are measured from the magnification of a double slit test target. The powers are determined in each focal planes of the IOLs, two different focal planes in case of a bifocal lens, two different crossed focal planes in case of a toric lens, four different focal planes in the case of a bifocal toric IOL, etc. The add power is calculated by subtraction of the near and far powers and the cylinder is calculated by subtraction of the crossed directions powers of a toric lens.

OptiSpheric Knowledge Base

Setup for in-situ measurement

MTF measurement principle

The measurement of the imaging quality is done through the evaluation of the Modulation Transfer Function (MTF). This objective and accurate method gives a full frequency resolved measurement of the optical quality.

The OptiSpheric® IOL measures the MTF on axis. It uses a single illuminated slit as object which is imaged on the focal plane of the sample. Due to diffraction and aberrations, there will not be a perfect slit image in this plane but a broadened slit, the so called Line Spread Function (LSF). The Fourier analysis of the LSF, giving the contribution of each spatial frequency, corresponds to the MTF of the sample. Alternatively to a slit it is also possible to use a cross (i.e. two perpendicular slits) giving the MTF in two image directions simultaneously or a pinhole giving as image a Point Spread Function (PSF) containing the complete MTF information in all directions.

OptiSpheric®

The image of a narrow slit is called “Line Spread Function”

OptiSpheric® Knowledge Base

A perfect grid pattern is imaged through the sample into the image plane

Knowledge Base OptiSpheric

MTF