Laser scanner for polarimetry and ellipso-metry on flat, extended objects (TRL4)
The imaging laser scanners TSXXX-4k consist of a transmitter unit and a receiver unit. They can be used either for defect, dimensional and material testing of transparent test specimens or for testing flat, shiny surfaces. These tests differ only in the arrangement of the test object and scanner components as well as the parameterization. In principle, they can be combined if necessary (e.g. with partially reflecting surfaces). Compared to camera systems, they are characterized by an extremely large depth of focus.
Transmission test principle
Principle of the reflection test
- Development, control and optimization of production processes
- Quality control (in goods issue or goods receipt)
- Transparent (transmission > 10%) clear or colored articles with low refractive powers (flat glass, bar glass, windscreens) also with very large depth expansion (e.g. 300 mm for windscreens)
- Plan for shiny and reflective surfaces
- Imaging telecentric laser scanners
- Evaluation of transmission, gloss or reflectance profiles shown
- Evaluation of polarization effects allows imaging of:
- birefringent profiles
- Profiles of the ellipsometric or polarimetric parameters
- layer thickness profiles...
The scanners provide line scans at their image interface (just like line scan cameras). The following quantities can be determined from the images:
- Absolute values and anomalies of the quantities shown
- Sizes and accumulations of the defects or anomalies
- Deviations of the values from those of good samples
- Dimensions
Depending on the scanner type down to < 10 µm
Line scans of 25 mm to (currently) 160 mm width
- Transmitter unit (emits the laser beam)
- Receiver unit
- 24V power supply
- Extremely large depth of field (compared to cameras)
- Robust against object displacement
- Easy adjustment
- Image interface (GiG-E or CameraLink)
- RS-232 interface for parameter setting
OPOS Scanner Player (OSP) for acquiring images and configuring the scanners. A complete evaluation software (Purity) with line connection is available from our partner Fraunhofer IOSB.
Different oil films on aluminum sheet (raw)
Different oil films on mirror sheet
Send us your samples for a first free test or let us convince you with a device demonstration in your house!
We would be glad to adapt the sensors to your needs or develop new functions for your application.
Patents
- M. Hartrumpf, "Laserscanner-Meßsystem"; DE19806288A1
- M. Hartrumpf, "LASER SCANNER MEASUREMENT SYSTEM"; EP1056987A1
- M. Hartrumpf, "Laser Scanner Measurement System"; US6858836B1
- M. Hartrumpf, "Vorrichtung und Verfahren zur optischen Charakterisierung von Materialien": EP11760701.0
- M. Hartrumpf, "Apparatus and method for optically characterizing materials": US9222879B2