Transparent Choice
The optimal prism for your application
Leica Geosystems offers a transparent selection of prisms in various sizes for different areas of application. These are standard prisms, special prisms, mini prisms as well as monitoring prisms.
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HIGHEST ACCURACY | |
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MAXIMUM LIFETIME | |
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COST EFFECTIVE MEASURING | |
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The prisms distinguish themselves through a centring accuracy of under 1mm and the best possible beam deviation of < 2" to achieve the maximum range. |
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Optimised for common operating distances, these prisms exhibit a beam deviation of up to 8" The special working of the optical coating, unique on the market, provides an above average lifetime. |
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Despite its attractive cost-performance ration, the 1000 series fulfils the strict Leica Geosystems process controls as well as users’ high demands regarding lifetime. |
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- Standard Reflectors
For the most common applications. All prisms have an antireflex coating for to provide highest longevity as well as to minimize measurement errors in close ranges
- Special Reflectors
For highest precision with ingenious technology such as a precision metal housing, or those with carbon fibre strengthened prism axis.
- Mini Reflectors
High value, small format prisms for highest accuracy at close to medium range. |
- Standard Reflectors
All-rounder prism with integrated target plate for standard applications.
- Special Reflectors
Optimised for long-term monitoring applications. The special anti-condensation construction with a patented filter guarantees reliable measurement ranges in difficult weather conditions. Choice of high-precision reflective tapes.
- Mini Reflectors
Easy to handle and light to transport mini prisms. |
- Standard Reflectors
Round prism with optional target plate.
- Special Reflectors
Optimised for monitoring applications with high demands on the relative measurement accuracy. Robust metal bracket for simple and flexible assembly. |
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Centring Accuracy
Measurement errors occur if Original prism holders are not used. Substitutes are not configured according to Leica Geosystems criterion and often exhibit displacement between prism, holder and recording pin. The holder and the prism constitute a unit with which the centring and repeat accuracy is defined. The smallest dimensional change in the geometry of a glass prism or on the holder can lead to a deviation from the centring axis and thereby create measurement errors.
Range
The beam deviation of a prism defines the its maximum range, according to the principle "entering beam should equal the exiting beam". The smaller the beam deviation (measured in angle seconds), the greater the directly reflected signal strength to the sender optic. The returned signal quality defines the maximum range of a measurement.
Lifetime
In contrast to many conventional prisms, the reflective copper coating on the reverse side of Original prisms consists of a support coating, a vacuum-metallised copper coating, a protective coating and an overlying coat of lacquer. The special adhesive lacquer protects the underlying layers from corrosion and detachment. Working together, the copper coating and the lacquer increase the life of the prism significantly. An additional anti-reflex coating on the sensitive front surface of the prism provides a tough resistance to scratches. The production process of these coatings is so complex that only a very few manufacturers worldwide meet the requirements of Leica original prisms.
Measurement Accuracy
Measurement errors occur frequently at close ranges when prisms without anti-reflex coating are used, as the front of a prism always directly reflects a certain percentage of a signal. Errors occur in the use of prisms without copper coating on the back side when moisture droplets accumulate or the prism becomes foggy. Leica Geosystems therefore uses either the stated reflective coating or a patented system for the prevention of fogging and condensation.
