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24.TARGET SYSTEM
Select a prism or a target depending on your purpose. The following are all special accessories (sold
separately).
An appropriate prism for Auto Pointing and Auto Tracking measurement: "10. TARGET SIGHTING AND
MEASUREMENT Appropriate prism for Auto Pointing and Auto Tracking"
• When using a reflecting prism equipped with a target for distance and angle measurements, be sure to direct
the reflective prism correctly and sight the center of the prism target accurately.
• Each reflective prism has its own prism constant value. When changing prisms, be sure to change the prism
constant correction value.
Reflecting Prism System (AP Series)
Use an appropriate system for iX.
The figure on the right is an example.
Because all reflecting prisms and accessories have standardized
screws, it is possible to combine these prisms, accessories, etc.
according to your objectives.
Prism constant correction value : -40 (used alone)
Aperture
360° Prism (ATP1), 360° Sliding Prism (ATP1SII)
These 360
prisms reduce the possibility of "lost prism" during Auto
°
Tracking measurement regardless of the direction of the prism.
3D positioning accuracy (standard deviation)
Prism constant correction value : -7
Recommended value for aperture: 34 mm
• Recommended value for aperture does not mean the actual
aperture of the 360
prism because it is a collection of prisms.
°
Pinpole prism (OR1PA)
Prism constant correction value : -30 (used alone)
Aperture
Reflective sheet target (RS series)
Prism constant correction value : 0
Aperture
2-point target (2RT500-K)
This target is used for two-distance offset measurement.
Prism constant correction value: 0
Aperture
: 58 mm
: 3mm (Horizontal acceptance
angle: 360° (full transit). Angles of
elevation and inclination both less
than 20°)
: 25 mm
: Target size
: 50 mm
153
ATP1
ATP1SII
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