Spherometer
Fast and efficient radius measurement of lenses
Spherometers made by TRIOPTICS are used worldwide in hundreds of optics companies and laboratories for the precise measurement of the radius of curvature of concave and convex lenses. The radius of curvature is determined by the tactile measurement of the sagittal height of the curved lens surface. This high-precision radius measurement by means of Spherotronic and SpheroCompact, which can also be used for calibrating test plates, represent the industry’s standard today. In addition, the long-term accuracy and automated functions of our spherometers are highly appreciated in laboratory and manufacturing environments.
High Precision
The high-precision ruby gauge head of the central encoder enables radius measurements with a measurement accuracy of up to ±0.005 %.
Traceability
The certified measuring rings and precision optical flats allow traceability of the measuring accuracy to international standards. This sophisticated technology is therefore regarded as the gold standard for laboratories and manufacturing.
Versatility
The selection of the model and associated selection of measuring rings with various diameters can be adapted to individual requirements. The versatile systems thus cover a very large measurement range.
Product Overview
SpheroCompact
Radius measurement in production
The SpheroCompact allows radius measurements in production with accuracies of up to ±0.05 %.
Multi-purpose use, particularly for highly curved convex and concave surfaces because small radii of up to +2.5 mm and -4 mm especially can be measured
Its compact design allows SpheroCompact to be used flexibly
Spherometer optimized with regard to price and performance for use in manufacturing
SuperSpherotronic HR
Precise and reproduceable
The SuperSpherotronic HR offers excellent accuracies of up to ±0.01 %.
Radius measurement of convex and concave surfaces up to +3 mm and -6 mm
Excellent precision for the measurement of highly curved surfaces with a large lens diameter by means of an increased travel of 60 mm
Extreme resistance to mechanical deformation thanks to the use of tungsten carbide balls in the ring
UltraSpherotronic
Highest precision
With an accuracy of up to ±0.005 % the UltraSpherotronic reaches the highest measurement precision worldwide.
Radius measurement of convex and concave surfaces up to +3 mm and -6 mm
Excellent precision for the measurement of highly curved surfaces with a large lens diameter by means of an increased travel of 60 mm
Extreme resistance to mechanical deformation thanks to the use of tungsten carbide balls in the ring
Software
SpheroPRO
The user-oriented software SpheroPRO was designed to fully meet the requirements in real-life applications. The intuitive user menu permits the easy, quick and error-free determination of the radius of curvature of lenses via pre-configured measurement programs. The current test step can be controlled directly by a schematic representation of the measured radius of curvature (concave or convex). Quality control is performed by means of a continuous statistical analysis of values.
Very easy handling through pre-configured measurement programs for various applications, e.g.: test tube and single surface measurements
Fast check of test step and measurement process for plausibility through schematic representaiton of radius of curvature (convex/concave) and current number of measurements
Continuous quality control through statistical analysis of measurements, including mean value, standard deviations and pass/fail analysis
Intuitive storage and recall of measurement series for quality control
Compact but comprehensive documentation in measurement certificates that can be stored digitally and printed
Intuitive storage of templates (selected ring, nominal radius, selected tolerance)
Ring calibration data are easy to import and, if necessary, update for product extensions or product checks
To reduce general maintenance and space requirements, the software has also been designed for touch screen operation. This eliminates the need for a keyboard and mouse
Technical Data
| Parameter | SpheroCompact | SuperSpherotronic | UltraSpherotronic |
|---|---|---|---|
| Radius (convex) | +2,5 mm … ∞ | +2 mm … ∞ 1) | +2 mm … ∞ 1) |
| Radius (concave) | -4 mm … ∞ | -4 mm … ∞ | -4 mm … ∞ |
| Travel of linear encoder | ±12,5 mm | ±30 mm | ±30 mm |
| Diameter of sample | 6 mm … 500 mm | 6 mm … 500 mm | 6 mm … 500 mm |
| Resolution of the linear encoder | 0.1 µm | 0.1 µm | 0.02 µm |
| Absolute accuracy of the linear encoder | ±0.5 µm | ±0.5 µm | ±0.1 µm |
| Measurement accuracy 2) | Up to ±0.05 % | Up to ±0.01 % | Up to ±0.005 % |
| Height | 140 mm | 289 mm | 289 mm |
| Diameter | 90 mm | 185 mm | 185 mm |
| Weight | 1.5 kg | 6.5 kg | 6.5 kg |
| Type | table top device | table top device | table top device |
1) Measurement of radii < +4 mm requires the replacement of the ruby ball and the use of the precision ring 3.5 mm.
2) The maximum achievable measuring accuracy depends on the radius of the lens to be measured and the ring used. For detailed information on special measuring tasks, please contact your sales partner.
Upgrades & Accessories
Precision rings with ruby balls
(SpheroCompact)
Standard set (diameter):
12.5 mm, 25 mm, 50 mm, 75 mm, 100 mm, 125 mmSpecial sizes (diameter):
6 mm, 20 mm, 30 mm 38 mm, 40 mm, 150 mm, 225 mmAccording to customer requirements
Precision rings with tungsten carbide balls
(SuperSpherotronic HR/UltraSpherotronic)
Standard set (diameter):
7.8 mm, 14 mm, 20 mm, 28 mm, 38 mm, 60 mm, 90 mm, 120 mmSpecial sizes (diameter):
12 mm, 14+3.5 mm, 20+1.8 mm, 28+1.2 mm, 48 mm, 75 mm, 150 mm, 225 mmAccording to customer requirements
Mechanical pressure pad
Constant and fixed contact pressure between the sample and ring
For small lenses with a low net weight
Foot switch
Activation of the measurement process
For efficient handling in series measurement