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\newpage
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\subsection{Sensors}
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\label{sec:sensors}
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In Mitsuba, \emph{sensors}, along with a \emph{film}, are responsible for recording radiance
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measurements in some usable format. This includes default choices such as perspective
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or orthographic cameras, as well as more specialized sensors that measure the radiance
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into a given direction or the irradiance received by a certain surface. The following
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section lists the available choices.
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\subsubsection*{Handedness convention}
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Sensors in Mitsuba are \emph{right-handed}.
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Any number of rotations and translations can be applied to them
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without changing this property. By default they are located at the
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origin and oriented in such a way that in the rendered image, $+X$ points left,
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$+Y$ points upwards, and $+Z$ points along the viewing direction.
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Left-handed sensors are also supported. To switch the handedness,
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flip any one of the axes, e.g. by passing a scale transformation like
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\code{<scale x="-1"/>} to the sensor's \code{toWorld} parameter.
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