Laser Physics and Optics

Laser Physics and Optics

Slaughter-integrated laser marking of farm-animals

Scientists at the Laser Zentrum Hannover, Germany developed a laser-based method for processing and marking of animals during slaughter. This greatly improves traceability, which on the one hand is demanded by many modern consumers and on the other hand makes it easier to sort out unfit carcasses.

Laser Captive Bolt Gun

For reliably stunning animals for slaughter a hybrid captive bolt gun is presented, that has an internal radiation channel through which, after penetration of the animals skull, a high energy laser beam is emitted to induce a coagulation of brain tissue in the Medulla oblongata region, the connection between brain an spinal cord.

Resonant material processing using (ultra-)short laser pulses

The invention relates to the usage of a tunable, resonant electromagnetic field for both, the targeted fabrication of structures with dimensions smaller than the used beam diameter and the targeted fabrication of ultra small particles. Therefor the electromagnetic field that is created by an ultra short laser pulse on the surface of an object is superposed with an external field to achieve a resonance rise specific to the processed material.

Direct coupling of light into a planar thin film waveguide

As disposable products, waveguide-based biochips offer a wide of possibilities, but relatively high manufacturing costs often make their use uneconomical. The most important cost factor is the structuring of the chip, which enables effective coupling of the laser light. A novel coupler makes it possible to couple light into chips without structuring.

Laser transmission welding using carbon fiber reinforced polymers

The invention deals with laser transmission welding of glass fiber reinforced polymers or unreinforced polymers with CFRTP. The absorption of the laser beam occurs mainly on the carbon fibers, thus, adding additives for absorption is not necessary.

Root sided monitoring system for laser welding

The newly developed method improves the monitoring and control process for beam welding. In contrast to most commonly used methods, the new monitoring process is root sided, i. e. it takes place on the back part of the workpiece. Furthermore, the invention describes a monitoring device optimized for beam welding. Beam welding using the invention avoids incomplete fusion at the weld interface and increases the stability of the weld joint.

Raman Refractometer Analyser Tool

The following invention represents a possibility to identify infusions when administered by an injection pump. The method involves a combination of Raman spectroscopy and refractometry. Both methods of analysis are based on instrumental analysis. Furthermore, algorithms are used for the evaluation which can be assigned to indirect hard modelling and statistics.

Gratings on glass surfaces

The newly developed method aims at producing small gratings on different materials, especially on glass surfaces, by ablating small amounts of material. The gratings can be small enough to form patterns with a diffractive effect causing the material to schiller in different colors.

Optical Image Scanning Microscope

The invented method allows to perform high-resolution Image Scanning Microscopy (ISM) purely optical. Very few additional optical components are necessary and the method is suitable for upgrading existing microscopes. The method can also be applied with 2-Photon Microscopy.

X-Ray tomography with anisotropic sources

Method for X-ray tomography with low-priced, anisotropic laboratory sources with good resolution and high measurement speed.

Polarization Lightsheet Microscopy

This invention is an extension for lightsheet microscopy that uses the polarization properties of the analyzed specimen to acquire additional information or to enhance image quality.

Absorbing nanoparticle-suspension for laser drilling

When using laser drilling, the material directly behind the drilled hole can be easily damaged. To prevent the damage, materials are placed at the backside of the hole which absorb the laser radiation. Here, a liquid containing nanoparticles is presented as an effective means of protection.

Kerr-Band-Switch

Based on the Kerr effect, the Kerr band switch implements an alternative concept to mode coupling for the generation of ultra-short laser pulses (UKP) in a cost-effective thin film system. The switch is flexible, ultra-fast and loss-free, has a high damage threshold and only low heating.

CRISTAL - sample embedding for correlative microscopy

CRISTAL represents a novel biological sample embedding procedure that is based upon UV-curable resin that both fixes the specimen while simultaneously adjusting the refractive index. Additionally, the procedure further allows histological, electron microscopy or molecular biological analyses of embedded samples.

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