heliOpticsTM WLI5 - Compact Mirau-Interferometer Module
Based on the highest resolution 3D-measurement technique of white-light interferometry, the WLI5 optics module offers unprecedented flexibility for integration with your metrology system. Its compact dimensions, small weight, and robust optical design enable a variety of interferometer config-urations and allow for use of small and cost effective linear motors.
With a vertical resolution down to nanometers and lateral resolutions down to 0.8 micrometer, the WLI5 is particularly suited for high-precision surface characterization and for measuring geometrical features such as step heights, co-planarity or flatness with extreme accuracy.
In combination with Heliotis’ smart pixel 3D-camera heliCam™ C3, as well as a range of interchangeable lenses, turn-key 3D-metrology is available in custom-tailored configurations and application specific lateral magnifica-tions. As the fastest scanning white-light interferometer, the WLI5/C3 configu-ration is ideally suited for integration into machines that inspect electronic components and packages, micro-mechanics, MEMS, micro-optics or sem-iconductors.
Features
Applications
WLI interferometer | Mirau configuration, exchangeable objectives (10x, 20x, 50x) | ||
light source | high power LED | ||
field of view (*) | 232x222 μm | 580x556 μm | 1160x1112 μm |
numerical aperture | 0.5 | 0.4 | 0.3 |
working distance | 2.52 mm | 3.57 mm | 3.57 mm |
vertical resolution (*) (single meas., RMS) | 50 nm 1 nm in phase mode | 70 nm 1 nm in phase mode | 100 nm 1nm in phase mode |
vertical scan speed (*) | up to 50 mm per second | ||
lateral resolution (*) | 0.8 μm | 2 μm | 4 μm |
reflectivity of sample (*) | < 0.1% to 100% |