PicoScalesensorheadtypeC02- Speci fi cationSheet
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Customer Information PicoScale sensor head type C02 Specification Sheet SmarAct GmbH Table 1. Summary of optical properties (typical). Wavelength Optical output power single mode Beam waist diameter (d0 ) Waist position Beam divergence Working distance Beam geometry Angular working range∗ The C02 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 C02 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. Laser output mode The C02 is a sensor head type optimized for large working distances. The probe beam is enlarged so that its divergence is reduced and more optical power can be collected after reflection at the target mirror. 0.2 0.4 0.8 0.6 Distance from head [m] 1.2 Working distances The PICOSCALE sensor head C02 is specified for working distances between 13 and 1000 mm. Figure 3 shows the optical signal for varying working distances. For the sensor head C02, 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. Figure 1. Schematic drawing of the sensor head C02. 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. Figure 2. Beam diameter a

0.4 0.8 0.6 Distance from head [m] Figure 3. Optical signal recovered by the sensor head as function of the working distance. 1.3 Angular working range The optimal performance of the sensor head is obtained, if the maximum light intensity returns from the target mirror. This is ensured for normal incidence of the probe beam on the mirror. However, the sensor head still collects some light, if the target mirror is tilted with respect to the beam. Figure 4 shows the angular working range of a C02 sensor head. For the measurement, a target mirror was placed at a working distance of about 50...

©SmarAct GmbH, 2017 A|| rights reserved Customer Information alternative housing material can be aluminum (-AL) or steel (-ST). 4. Optical fiber PicoScale sensor head type C02 - Specification Sheet — 3/4 The sensor head C02 is interfaced with the PICO -SCALE controller via an optical fiber with an FC/APC connector (8° angled end face to minimize back-reflections). By default, the sensor heads are equipped with a 900 p.m fiber, which is 1.5 m long. Both the fiber length and the actual fiber type can be customized. SmarAct offers the following options for the fiber type: -A: 150 p.m...

©SmarAct GmbH, 2017 A|| rights reserved Customer Information PicoScale sensor head type C02 - Specification Sheet — 4/4 5. Order code The order code of the sensor heads is built as follows: PS -SH -C02 -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