ATR objective
The dedicated ATR objective (20x) for the HYPERION allows clear sample viewing without sacrificing infrared light throughput. After the sample positions are defined in the visual image, the ATR crystal is moved on the highly accurate column mechanism to activate the infrared acquisition. The internal pressure sensor reproducibly ensures optimal contact between the sample and the crystal during data acquisition. In combination with the automatic z-drive (option) for the motorized xy stage, even large areas of the sample can be analyzed with high spatial resolution applying automated ATR mapping. To be useful for samples ranging from soft to very hard, different pressures can be selected at the ATR objective.
ATR crystals with different tip sizes are available. They are made from materials with a high refractive index (germanium or silicon) that permit even the investigation of dark materials. Furthermore, the ATR crystal acts as a solid immersion lens so that the spatial resolution achieved with ATR is increased by a factor equal to the refractive index of the ATR crystal (germanium = 4) compared with measurements performed in transmission or reflection.
Properties ATR-Objective
- Pressure sensor integrated in objective
- Automized ATR-mapping measurements also on structured samples
- Adjustment of contact pressure to hardness of sample
- Highly accurate mounting of ATR-crystal
- ATR-crystals made from germanium or silicon allowing measurement of strongly absorbing (dark) samples and providing higher lateral resolution
