Fiber Series - Optomet

Product Description

The Optomet Fiber Series is a fiber-coupled laser Doppler vibrometer in Optomet’s CLASSIC Series. It measures the velocity, displacement and acceleration of a vibrating surface without contact. A short-wavelength infrared (SWIR) laser is delivered through an optical fiber to a separate measurement head, so the head can be positioned in confined spaces or challenging environments while the vibrometer unit remains remote.

The instrument operates on the Doppler principle. The measurement laser at 1550 nm is focused on the target through the fiber head, and the frequency shift of the reflected light is converted into surface motion by Optomet’s UltraDSP digital signal processing. A visible targeting beam at 510-530 nm aids alignment. The measurement laser is class 1 (below 10 mW) and the targeting beam is class 2 (below 1 mW).

The Fiber Series covers a frequency bandwidth from DC to 25 MHz and a maximum vibrational velocity of ±30 m/s, with a displacement resolution down to 50 femtometers and a 32-bit dynamic range for displacement. The number of velocity, displacement and acceleration ranges depends on the decoder configuration selected.

The fiber link uses cable lengths of 2, 5, 20 or more metres, and several measurement heads can be connected to one vibrometer through an optical switch with Ethernet-controlled channel selection, so multiple points can be measured without repositioning the unit. Six head options are available, from a Compact head with fixed working distances up to Autofocus Long-Range heads reaching 100 m.

The vibrometer unit is operated through a 3.5-inch colour screen with a 20-segment LED bargraph, touch screen, knobs with a push-button and a key switch. It provides a GBit Ethernet (RJ45) or WiFi digital output and three BNC analog outputs, and is controlled and read out with Optomet’s OptoGUI software. The unit measures 380 × 180 × 148 mm (excluding handle and lens) and weighs 8 kg.

Key Features

• Fiber-coupled, non-contact measurement of velocity, displacement and acceleration
• SWIR measurement laser at 1550 nm with a 510-530 nm visible targeting beam; class 1 measurement, class 2 targeting
• Frequency bandwidth DC to 25 MHz; maximum vibrational velocity ±30 m/s
• Displacement resolution down to 50 fm with 32-bit dynamic range
• Six fiber head options spanning 15 mm to 100 m working distance
• Multiple heads on one vibrometer via optical switch with Ethernet channel selection
• GBit Ethernet / WiFi digital output and three BNC analog outputs
• 3.5-inch colour screen with LED bargraph; OptoGUI software for control and analysis
• Vibrometer unit 380 × 180 × 148 mm, 8 kg