Figure 2From: A closed form unwrapping method for a spherical omnidirectional view sensor Spherical mirror’s toleration on rotational error. A spherical mirror is technically a hemisphere. The other half is usually not useful therefore is rarely incorporated into the sensor design. Since the viewing angle does not encompass the complete hemisphere, it can often tolerate rotational error up to a certain degree, θ. The vertical dash line represents the optical axis.Back to article page