That is a pencil of rays.
那是一束光线。
Pencil of rays
英语例句库
英语百科
Pencil (optics)
![A pencil-beam radar](/Images/godic/202502/01/3d-radarp5947.jpg")
In optics, a pencil or pencil of rays is a geometric construct used to describe a beam or portion of a beam of electromagnetic radiation or charged particles, typically in the form of a narrow cone or cylinder.
Antennas which strongly bundle in azimuth and elevation are often described as "pencil-beam" antennas. For example a phased array antenna can send out a beam that is extremely thin. Such antennas are used for tracking radar. See Beamforming for further details.
- salmochelin
- Salmocid
- Salmo gairdneri
- Salmo gairdneri irideus
- salmo gairdneris
- salmo IFN
- salmo irideus
- salmoite
- Salmol
- salmon and crab floating cannery
- salmon and trout factory ship
- salmon and trout mother ship
- Salmon Arm
- Salmon,Atlantic
- Salmon Bank
- Salmon Bay
- Salmonberries
- salmon berries
- Salmon berry
- salmonberry
- salmon boat
- salmon brick
- salmonburger
- salmonburgers
- salmon calcitonin