Streak tube with connection lead to reduce voltage propagation differences

A streak tube comprising:

• a container having an entrance plate and an output plate;
• a photocathode disposed in the container and configured to emit electrons according to light to be measured, the light having been incident through the entrance plate;
• and
• a sweep electrode disposed in the container, having a first deflection plate and a second deflection plate for generating an electric field and a connection lead connected to each said deflection plate, and configured to sweep the electrons in a sweep direction along the output plate,
• wherein opposing edges of the first deflection plate in a direction of the output plate are formed so as to extend in a direction from the entrance plate to the output plate,
• wherein the connection lead connected to the first deflection plate has a first connection portion electrically connected to the first deflection plate, and
• wherein the first connection portion is connected to the opposing edges,
• wherein the container has a pin penetrating the container,
• wherein the connection lead has a second connection portion electrically connected to the pin, and
• wherein the first connection portion has a first end branching off from the second connection portion and connected to one of the edges and a second end branching off from the second connection portion and connected to the other of the edges.