| |||
| gray-wedge; grey-wedge | |||
| neutral wedge | |||
| optical wedge (light-absorbing wedge of uniformly increasing density); neutral density wedge (light-absorbing wedge of uniformly increasing density); continuous wedge | |||
| gray wedge | |||
| neutral gray wedge; wedge filter | |||
|
Graukeil : 2 phrases in 2 subjects |
| Optics branch of physics | 1 |
| Technology | 1 |