FAQ

What is the Acceptance Angle?
Acceptance angle is defined as the angle over which beam radiation may deviate from normal to the aperture plane and yet reach the observer. Acceptance Angle is usually measured using the Degree for Angle. Note that the value of Acceptance Angle is always negative.
Can the Acceptance Angle be negative?
Yes, the Acceptance Angle, measured in Angle can be negative.
What unit is used to measure Acceptance Angle?
Acceptance Angle is usually measured using the Degree[°] for Angle. Radian[°], Minute[°], Second[°] are the few other units in which Acceptance Angle can be measured.
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