The unit for photonics is responsible for the development and design of optical sensor systems. We have a distinct focus on optical measurement systems with which we can combine technologies such as opto-ASIC, diffractive optics and electro-optical carriers together with practical optical measurement technology. We carry out a mixture of long-term, research-related development tasks along with product development and projects for companies. Underpinning these activities is our expertise in electrical design, signal processing and programming, which is invaluable for prototype production.
Optical filters on photodiodes
We have developed a concept and technique for integrating an optical filter directly onto the active surface of a photodiode. This provides numerous benefits: the system can be made smaller and lighter, assembly is simpler, and the manufacturing costs are less. It is also possible to apply filters with different optical characteristics onto a single photo diode chip. In other words, different parts of the multi-element photo diode can be made sensitive to light of different wavelengths.
UV measurement
By using our technology for integrated optical filters, we have developed a sun dosimeter. This has photo diodes with optical filters for UVA radiation and UVB radiation. Thus, the sun dosimeter reads the actual intensity of both these wavelengths regions.
Based on the same technology, systems for other UV-measurement applications can be developed. The system can be tailored in order to measure any wavelength region that is of interest in the actual application.
Fluorescent measurements
While developing an instrument for point-of-care diagnostic, we acquired in-depth knowledge of fluorescent measurement in general, including suitable optical and electro-optical components. In most fluorescent-measurement situations, the intensity of the emitted light is extremely low. This places great demands on the components and on the optical construction as a whole.