PicoScalesensorheadtypeC03- Speci fi cationSheet
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Customer Information PicoScale sensor head type C03 Specification Sheet SmarAct GmbH 1.1 Beam profile The beam diameter is smaller than 2 mm for the whole specified working distance, as shown in figure 2, providing very low divergence. Table 1. Summary of optical properties (typical). Wavelength Optical output power Laser output mode single mode Beam waist diameter (d0 ) Waist position Beam divergence Working distance Beam geometry The C03 is a sensor head type optimized for moderate working distances and using retro-reflectors as target. The probe beam is enlarged so that its divergence is reduced and more optical power can be collected after reflection at the target mirror. Compared to the C02 sensor head type, it has a smaller form factor. The optical properties are similar but for very large working distances, the C02 head should be preferred due to possible diffraction effects. Angular working The C03 sensor head type is based on the standard sensor head type C01, including the fiber collimation optics and the beam splitter. The beam splitter splits the beam into a reference and probe beam. The reference beam is reflected by an internal reference mirror, coated to one side of the beam splitter cube. In the C03 sensor head, the probe beam exits the head after being expanded by a telescope (two lenses) to significantly reduce the beam divergence. It is reflected off the target surface and tracks its relative displacement. The front surface of the beam splitter marks the absolute zero position of every PICOSCALE measurement as here the probe and reference beam are of equal length. 0.1 0.2 0.3 0.4 Distance from head [m] Figure 2. Beam diameter as function of working distance. Figure 1. Schematic drawing of the sensor head C03. 1.2 Working distances The PICOSCALE sensor head C03 is specified for working distances between 13 mm and 500 mm. Figure 3 1

shows the optical signal for varying working distances. For the sensor head C03, the recommended working range is not limited by the divergence of the laser beam. However, damping of the modulation depth for long distances limits the actual optical signal. Customer Information PicoScale sensor head type C03 - Specification Sheet — 2/4 Figure 4. Angular working range for a sensor head C03 and a target mirror at a distance of 50 mm. The typical minimum angular working range was determined to ±0.013 degrees. 0.1 0.2 0.3 0.4 Distance from head [m] Figure 3. Optical signal recovered by the sensor...

Customer Information PicoScale sensor head type C03 - Specification Sheet — 3/4 A standard sensor head C03 has a titanium housing with a diameter of 6 ± 0.05 mm and 20.6 mm length. A CAD drawing of this head is shown in figure 5. SmarAct offers customized housings of larger dimensions, both with circular and rectangular shape. The alternative housing material can be aluminum (-AL) or steel (-ST). 4. Optical fiber The sensor head C03 is interfaced with the PICOSCALE controller via an optical fiber with an FC/APC connector (8◦ angled end face to minimize backreflections). By default, the sensor...

©SmarAct GmbH, 2017 A|| rights reserved Customer Information PicoScale sensor head type C03 - Specification Sheet — 4/4 5. Order code The order code of the sensor heads is built as follows: PS -SH -C03 -B -D -E -F -G -H where the placeholders can be replaced by the respective option code. These code are given in the table below. If you do not specify an option, the default value is used. Category Shortcut Description SmarAct GmbH Phone: +49(0)441-800 879-0 Germany Email: info@smaract.com SmarAct GmbH Schuette-Lanz-Strasse 9 D-26135 Oldenburg Germany