25 mm Mini Prism System with Center Vial - Flo Orange ADS102-A
Here's a versatile prism system in a small package
The assembly features a 25 mm copper-coated prism, for fog prevention, a tilting holder, with friction axis, zero or -30 mm offset
Powder painted Fluorescent Orange with Fluorescent Yellow targets
Includes a 40-min adjustable circular center-mounted vial
Assembly can mounted on a Prism pole or tribrach at three heights: 70 mm, 100 mm, 115 mm, or can be hand-held using the plumb bob bracket or with S-hook for quick attachment to plumb bob
Also included a point for stake-out work, and a system bag with belt loop
 
Features:
Metal yoke and metal housing
Connecting thread: 5/8"
Offset: 0/30 mm
Circular bubble in support
Double sided target board
Prism diameter: 25.4 mm
Accuracy: ±5"
 
Delivery includes:
Prism, accessories and cushioned prism bag
 
ACCURACY OF THE REFLECTOR
A circular prism is manufactured by cutting the corner from a solid glass cube. This creates three mutually orthogonal reflecting surfaces that reflect any light rays back towards their source.
 
ANGULAR BEAM DEVIATION
The angular difference between the entering and exiting beam is known as Angular Beam Deviation. A high deviation significantly reduces the returned signal strength and hence the measurement range.
After manufacture, each prism is measured by Zygo inferometer to determine its beam deviation.

REFLECTIVE COATING
Leica prisms have a copper coating on the reflecting surfaces. Copper offers a very high reflectance of infrared beams. Being robust and resistant to corrosion it has a long useable life.