Cutting machine

A cutting machine comprising:

• a chuck table that holds a workpiece;
• a cutting unit including a cutting blade with a cutting edge disposed in an annular shape to cut the workpiece held on the chuck table;
• a monitoring unit that monitors the cutting edge of the cutting blade;
• and
• a monitor,
• wherein the monitoring unit includes an imaging unit that images the cutting edge of the cutting blade, a pulse light source that emits a pulse light to illuminate an imaging zone imaged by the imaging unit, and a camera that captures an image outputted from the imaging unit,
• the imaging unit includes a first imaging unit that images one side surface of the cutting edge of the cutting blade, and a second imaging unit that images an opposite side surface of the cutting edge,
• the first imaging unit includes a first prism having one face opposite the one side surface of the cutting edge, a first imaging lens arranged on an opposite face of the first prism, and a first optical fiber connected at one end face thereof to the first imaging lens to transmit a first image,
• the second imaging unit includes a second prism having one face opposite the opposite side surface of the cutting edge, a second imaging lens arranged on an opposite face of the second prism, and a second optical fiber connected at one end face thereof to the second imaging lens to transmit a second image, and
• the first image outputted from an opposite end face of the first optical fiber and the second image outputted from an opposite end face of the second optical fiber are transmitted to the camera and are then displayed on the monitor.