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ELWIMAT® VarioFoc
Fully Electronic Autocollimator with Variable Object DistanceThe ELWIMAT® VarioFoc is a compact, highly precise electronic autocollimator with an integrated focus function for setting variable object distances. It is ideal for applications with changing test piece distances, such as in alignment, validation, or calibration of optical systems. Whether in series testing or the laboratory – the VarioFoc offers maximum flexibility while maintaining excellent accuracy.
Flexible Object Distance through Motorized Focus Adjustment
The integrated linear slide allows the focus point to be adjusted electronically – from infinity to just a few centimeters. This enables precise simulations of both real and virtual object positions. It allows for accurate testing of camera modules, lenses, LiDAR sensors, or cylindrical optics – even in automated inline inspection.
Highest Accuracy Even at Large Distances
Despite its high flexibility, the system provides subpixel-accurate angle measurement with resolutions up to 1.8″ and a slide positioning accuracy of 2 µm. Even at large virtual or real distances, linearity remains < 1% (or better with mapping file).
Digital Control & Reticle Variety
The ELWISOFT software offers a touch-optimized interface, subpixel-accurate analysis, focus control, and automatic logging. The following reticles are available for adapting to various applications: Crosshairs (10/30 µm), Pinholes (20–1000 µm), MTF reticle with inclined edge, custom shapes on request. Thanks to USB 3.0, serial interface, and JSON protocol, the VarioFoc is fully Industry 4.0 compatible.
Applications
- Calibration and focus testing of cameras and LiDAR sensors
- Alignment of optical assemblies at variable distances
- Measurement of radii, thicknesses, and wedge angles of lenses
- Centering of aspheres, cylindrical lenses, and lens systems
- MTF measurement with inclined edge (according to standards)
- Automated validation of opto-mechanical components
Technical Specifications – ELWIMAT® VarioFoc (Standard Versions)
| Technical Specifications | Details (From – To) |
|---|---|
| Focal Length / Diameter | 30/40 mm – 200/65 mm |
| Measurement Axes | 3 axes: Angle φx, Angle φy, Distance z (z') |
| Measurement Range (Angle, 2w) | 0.9° – 5.1° |
| Pixel Resolution (Angle) | 1.8″ – 11.8″ |
| Reproducibility (Angle) | 0.09″ – 0.7″ |
| Focus Range z | 13 mm or ±6.5 mm (symmetrical) |
| Slide Position Accuracy | 2 µm |
| Min. Object Distance z' @ ±6.5 mm | ±138 mm – ±6,200 mm |
| Min. Object Distance z' @ +13 mm | –69 mm – –3,080 mm (virtual) |
| Min. Object Distance z' @ –13 mm | +69 mm – +3,080 mm (real) |
| Accuracy / Linearity | < 1% of the measurement value + 2R (higher accuracy with mapping file upon request) |
| Clear Aperture | 7.3 mm – 48 mm |
| LED Wavelength | 405 nm – 905 nm |
| Min. Reflector Ø @ R > 60 % | 0.7 mm – 4 mm |
| Min. Reflector Ø @ R = 4 % | 2.8 mm – 15 mm |
| Sensor Weight | 1.2 kg – 2.8 kg |
| Sensor Dimensions | Ø 40 f8 (154 × 62 × 115 mm³) – Ø 65 f8 |
| Interfaces | USB 3.0, Serial |
| Reticle Options | Crosshair (10 / 30 µm), Pinholes (20–1000 µm), MTF Edge, Custom Shapes upon Request |
| Software | ELWISOFT – Subpixel-accurate analysis, mapping, touch-optimized |
| Industry 4.0 Support | JSON protocol, wireless communication available |
| Scope of Delivery | Autocollimation Sensor, Controller, Connection Cables, ELWISOFT Software |
Why ELWIMAT® VarioFoc?
- Precise focus & angle measurement even at large distances
- Variable object distances – adjustable both real and virtual
- Compact design for integration into test stands and systems
- Intuitive operation with touch-optimized software
- Industry 4.0 capable with modern interfaces & JSON protocol
Request or Order Now
For personalized advice or more information about the ELWIMAT® VarioFoc, we are always available. Simply contact us via our contact form or call us.
