GPR/GPS Sensing Head
GP Series
Rev. F 10/2011
51
5.2.3
Right Angle Mirror
The Right Angle Mirror is used to obtain a perpendicular view of the
object. It is often used when space is limited or when you need to
avoid excessive radiation to the sensor. It must be installed after the
bracket or after the Air Purge Collar (if used) and screwed in fully. In
dusty or contaminated environments, air purging is required to keep
the first surface mirror clean. If used in conjunction with the Air
Purge Collar, both the Right Angle Mirror and the Air Purge Collar
must be air purged.
Figure 39: Right Angle Mirror
When using the Right Angle Mirror, adjust the emissivity settings
downward by 5%. For example, for an object with an emissivity of
0.95 use 0.9; for an object with 0.8 use 0.76; for 0.65 use 0.62. This
correction accounts for energy losses in the mirror.
