ASCOS Philosophy
The Advanced Study Course on Optical Sensors is a European initiative to establish education, discussion, and a contact platform for young researchers working in the growing field of optical chemical sensors and biosensors. ASCOS is a biennial event, held each time in a different European country, and receives students and tutors from around the world. In 2025, we are celebrating the 13th edition of the ASCOS Series in León (Spain).

The aim of ASCOS is to bring together bright young scientists (from Master level upwards), coming from all fields of expertise related to optical (bio)chemical sensors, to learn from selected tutors and each other in a relaxed atmosphere.
ASCOS follows a model that strongly stimulates interaction among the students and the expert tutors:
- Tutorial Lectures covering fundamental theory and basics at a level accessible for every participant, and the exciting latest developments and applications of optical sensor technologies. The lecturers are established and renowned scientists in their respective fields, carefully selected by the ASCOS advisory board to ensure a high scientific level.
- Project Group Work, during which the students are challenged to apply their knowledge in solving specific real-life problems using optical sensor systems. Aided by the expert tutors, small and mixed groups of 5 – 6 students will work together during the course and present their solution to a given problem to an audience representing the international scientific community.
Furthermore, ASCOS 2025 also includes complementary sessions on Intellectual Property, Scientific Publications, and a Round Table on Career Opportunities, with invited experts on optical sensors currently working in academia, industry, and other exciting professional options.

Together with the scientific program, there will be ample opportunity for socializing and networking, thus facilitating the other major aim of ASCOS: to form a network of interdisciplinary and international contacts and cooperation.