light pen

A pen with high pressure sensitivity picks up even light pen strokes, making it easy to create different shades and shapes without digital augmentation.

When you are firing out at night, the red tracers go out into the blackness as if you were drawing with a light pen.

The light-spot cursor and joy-stick method replace the light pen in this case.

A light pen held against a particular part of the display pattern can be used to signal the computer.

Made of fine and light pen steel, and works as well in shirt sleeves as with a coat on.