optische

Optische is an adjective used in German and Dutch to mean "optical" or "relating to sight and light." In German, it appears in phrases such as optische Eigenschaften (optical properties) or optische Linsen (optical lenses). In Dutch, it functions similarly, for example optische illusie (optical illusion) and optische vezels (optical fibers). The root derives from Latin optic(us) and Greek opsis, reflecting the historical lineage of terms for sight and light.

In scientific and technical contexts, optische describes light interaction with matter or devices. It is used to discuss properties such as refractive index, absorption, and scattering, as well as phenomena like optical activity. It also appears in reference to equipment and systems such as optische Instrumente, optische Sensoren, optische Sensorik, and imaging devices. The term spans disciplines including physics (optics, geometrical optics, wave optics), chemistry (optical activity of chiral molecules), and materials science (optical properties of coatings and polymers), as well as engineering (optical engineering, fiber-optic communications).

Linguistic notes show close parallels to the English "optical." In education, industry, and standards, optische is used to distinguish light-based features and technologies from non-optical ones. See also related concepts such as Optik, geometrische Optik, Wellenoptik, optische Filter, and photonics.