Optical Measurement Technology

Contact: Dr.-Ing. Maximilian Paßmann

For non-intrusive investigation of flow fields, the Chair of Hydraulic Flow Machines is equipped with modern optical measurement technology. Below is an overview of the available measurement methods and hardware equipment.

Available Methods:

• Planar PIV – Determination of 2D flow vectors in a plane.
• Stereo-PIV – Determination of 3D flow vectors in a plane.
• Interferometric Mie Imaging (IMI)
• Dantec LDA System
• Shadow and Schlieren Photography – Various setups are possible, such as Background Oriented Schlieren (BOS) or classical Schlieren photography (z-Type setup).
• Flow Visualization using smoke filament visualization or surface dye coatings.

Hardware:

Dual-Image Cameras:

• LaVision Imager Pro SX 5M – 3 units
• LaVision Imager Intense – 2 units
• LaVision FlameStar 2
   

Laser system:

• Evergreen 70 Nd:YAG Doppelpuls Laser
• New Wave Solo III-15 Nd:YAG Doppelpuls Laser
• Litron Nano S 65-15 Nd:YAG Doppelpuls Laser
• Linienlaser HE-NE NEC CW-Laser
   

Additional Optical Components:

• Questar QM 100 Far-Field Microscope
• Infinity DistaMax Far-Field Microscope
• LaVision LED Backlight
• Numerous lenses (zoom lenses and fixed focal lengths)
• Various light sheet optics
• Optical Diffuser (LaVision)
• Various mirrors, lenses, beam splitters, etc.
• Two optical tables
• Large selection of optical mounts and positioning units 

Additional Optical Measurement Technology:

• Fiber-Optic Probe Hydrophone
• Optical Oxygen Measurement Device

Software:

• LaVision DaVis (for 2D and Stereo PIV and IMI)
• PIVlab for MATLAB (for 2D PIV and BOS)
• National Instruments LabVIEW