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Leica GPR121 Circular Prism

Description

Precision circular prism with anti-reflex coating, mounted in a metal holder. This prism usually comes with a removable target backplate installed.

Specifications

Model:GPR121
Manufacturer:Leica
MPN:641617
Height Offset:86.0 mm
Absolute constant: -34.40 mm
Leica constant: +0.00 mm
Dimensions (W x H x D):160x166x65.5 mm
Centring accuracy:±1.0 mm
Mount:12mm (Leica) Spigot

Leica GPR121 Circular Prism FAQ

Below is a list of frequently asked questions about Leica GPR121 Circular Prism.

What is the prism constant for the Leica GPR121 Circular Prism?

The absolute prism constant (true value) for the Leica GPR121 Circular Prism is -34.4mm. The prism constant as defined for Leica instruments for Leica GPR121 Circular Prism is 0.0mm. For a more detailed explanation on prism constants please see this article.

Can I use the Leica GPR121 Circular Prism with a Leica instrument?

Yes, you can use the prism with a Leica instrument as long as you set up the correct prism constant in the instrument settings.

What is the prism constant value that I need to use with a Leica instrument?

In order to use the Leica GPR121 Circular Prism with a Leica instrument you should use 0.0mm as the prism constant value.

What is the height offset of the Leica GPR121 Circular Prism?

The Leica GPR121 Circular Prism height offset is 86.0mm. This is measured from the mounting point to the centre of the prism.