光軸合わせ

optical-axis alignment

[目次：レンズ系]

電子銃から投影レンズまで各レンズの軸を光軸に合わせて、電子線がまっすぐ進むようにすること。

"Optical-axis alignment" is to align the axes of the illumination and imaging systems, ranging from the electron gun to the projector lens, with the optical axis. This alignment enables the electron beam to travel in a straight path.