| Subject | German | English |
| opt. | Filtergläser mit kurzwelliger Grenzwellenlänge | short-wavelength cut-off filters (optical materials which are transparent throughout the ultraviolet region down to their absorption edges, below which they are opaque) |
| opt. | infrarotdurchlässiges IR-durchlässiges Filterglas | infrared-transmitting glass |
| opt. | Kombination von Filtergläsern | glass filter combination |