Modern laser applications demand ever-increasing accuracy in the measurement and control of the laser beam. Various types of sensors and instruments are in use today, the choice depending on the type of measurement needed.
However, even given the correct choice of equipment, there are measurement conditions that can seriously affect the accuracy of the readings obtained if not correctly taken into account. Examples include ambient temperature, incidence angle of the beam on the sensor, and others.
In this article we’ll examine to what degree incidence angle matters when you’re measuring laser beam power or energy. We will consider a number of common sensor types.