Technical Data of the Different Technologies
| Mosaic Technique | Laser | |
|---|---|---|
| Wavelength Ranges | 340 – 2650nm | 340 – 2650nm |
| Contrast Ratios | As selected polarizers | As selected polarizers |
| Segment Size | approx. 2 – 20mm | from 30µm |
| Alignment of Polarization Axes | < 0.5 – 2° | < 0.5° |
| Shape | highly limited | unlimited |
Laser-Structured Polarizers
With the new laser-structured colorPol® SLA polarizer, codixx introduces the next generation of structured polarizers.
A laser selectively removes the surface layer containing the silver nanoparticles. The result is a structured polarizer with areas that are either transparent or linearly polarizing. The shape and number of these areas can be customized as needed. The resolution can be as fine as 25 µm – and at very low costs. All areas share the same polarization axis and the same wavelength range.
To create a polarizer with regions of different polarization axes, at least two of the aforementioned polarizers must be stacked (see diagram). The more different polarization axis orientations are required, the more layers need to be stacked.
Mosaic Technique
colorPol® is ideally suited for this classic method of manufacturing structured polarizers. Different polarization directions and wavelength ranges can be selected for each segment. However, the size, shape, and number of segments are limited due to the manufacturing process.
The thin glass polarizers are precisely cut, for example, using wafer saws. Each individual piece is carefully assembled in the desired sequence. Finally, the entire mosaic is placed between two carrier substrates.