Printed Designs Moving Through a Paper-Handling Machine at High Speeds Are Invisible to the Eye, but the Phototube in a Modern Control System Sees these Designs and Makes Each Arrive at a ...

It contained a phototube (vacuum tube that's sensitive to light) attached to a circuit to sense light from oncoming cars. The ...

With the exclusively engineered Pol phototube, crosshairs, object and iris diaphragm can be seen simultaneously, owing to an extra intermediate image plane. Thanks to the modifiable iris diaphragm, ...

(100% to eyetubes or 80% to phototube and 20% to the eyetube.) Each microscope head has the eyetubes inclined at 30 degrees with the left eyetube having graduated diopter settings. The ...

Owing to an additional intermediate image plane, the specifically developed crosshairs, pol phototube, object and iris diaphragm are visible concurrently With the adjustable iris diaphragm, the limits ...