Laser Scanning

Laser beam shaper and mirrors for non-contact measurement and quality control

Laser scanners use a laser beam to scan surrounding objects and determine their surface and shape. They are used in particular for scanning bar codes and analyzing bodies, the so-called 3D laser scanning.

When scanning a barcode, the reflected light is interpreted: A rotating wheel with several mirrors guides a laser beam over the bar code. The different reflections of the black lines and the white gaps are transmitted via the rotating mirror wheel to an optical receiver and evaluated (see Figure 1).

In 3D laser scanning, the time difference between emitted and reflected laser beams is transformed into a 3D model. For this purpose, a laser scans the surrounding objects and spatial conditions via a rotating mirror wheel in a fine grid. When the laser beam is emitted, a timer starts to run and stops measuring its time only when the beams reflected by the objects have been converted into an electrical signal by a photodiode inside a laser light receiver. Through a coupling with software systems and through the determined time, it is possible to transform the scanned bodies and surfaces into a 3D model and visualize them on a display. In addition, a statement about the brightness of the bodies can be made about the reflected light intensity. From the information obtained from the many thousands of individual points, a point cloud is created which is based on three-dimensional coordinates and grey values of the measured surface points. The numerous measuring points allow fast, realistic and reproducible imaging of the scanned objects.

While barcode laser scanning is mainly used in areas such as goods logistics and purchasing, 3D laser scanning offers a wide range of applications. The non-contact measuring method is also suitable for hard-to-reach and complex objects such as bridges or roof constructions. In architecture, laser scanning is used, for example, to calculate and plan facade measurements. In the field of monument preservation, it can be used to determine the current state of historical buildings, which, for example, provide valuable information for the planning of construction measures. The digital recording of factories and their plants is used for the planning of modernization and conversion measures. Another advantage is the continuous production, which saves time and money.

3D laser scans are also used in the area of quality control. Scanned products are compared with stored target models based on their geometry. Deviations from the ACTUAL form to the TARGET form are shown in color and guarantee efficient production and manufacturing. In different phases of production, deformations or corrosion of products, for example, can be detected by comparison measurements.

The film industry uses 3D laser scans for the digital visualization of film locations. For example, lighting and camera paths can be planned. The gaming industry uses laser-scanned locations to model virtual realities.

Laser scanners require various high-quality optics, from beam shaping systems to semi-transparent mirrors. asphericon offers a wide range of high-quality optics and additional coatings that ideally adapt your laser scanner to your requirements.

Strahlformung
a|TopShape
a|TopShape
a|TopShape x
a|TopShape

Der a|TopShape ist ein innovativer Strahlformer, der kollimierte Gaußstrahlen in kollimierte Top-Hat Strahlen umwandelt.

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a|AiryShape
a|AiryShape
a|AiryShape x
a|AiryShape

Der a|AiryShape ermöglicht in Kombination mit einer Fokussierlinse die Umwandlung von kollimierten Gaußstrahlen in verschiedene fokussierte Strahlprofile (z.B. Top-Hat, Donut).  Dank seiner kompakten Bauweise lässt er sich problemlos in bestehende Set-ups integrieren.

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Mirrors
Parabolic Mirrors
Parabolic Mirrors
Parabolic Mirrors x
Parabolic Mirrors

Whether you are looking for components for telescopes or measuring technology, asphericon offers complex solutions and the highest precision from a single source. Starting with optical design and the production of your mirrors, asphericon also produce coated elements, such as dielectric mirrors for single wavelengths, two wavelengths and the entire bandwidth as well as  metallic mirror coatings made from aluminum, gold and silver. Learn more about the details...

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Coating
Optical Coating
Optical Coating
Optical Coating x
Optical Coating

High-end optical coatings for each application – in outstanding quality, with reasonable delivery times and the reliable asphericon service. Equipped with state-of-the-art manufacturing and measuring technologies, our experienced team of technicians can turn your coatings ideas into reality.

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