Prisms

PRISMS

Gestione Silo is the ideal partner for fully custom prisms

Always a strong point of our production, we create custom prisms of all shapes and sizes using a wide range of glass types. We regularly collaborate with both industrial and university research organizations, producing prisms from 4 mm up to 400 mm, with angular tolerances up to 5 "(depending on geometry).

Our prisms are usually used to make binoculars, astronomical telescopes, and vision instruments. Depending on their characteristics, they allow optimal use of the instrument. Below are some of the most used prisms and prismatic configurations.

Pentaprism

A five-sided prism that allows a 90 ° beam deflection combined with an image reversal.

Prisma of leek

These are 2 prisms bonded at 90 °.

It allows the vision of the image erected through four reflections: these reflections take place at angles of incidence at 45 °. The typical application is for making binoculars.

Beamsplitter Cube

The classic beam divider element consists of two straight prisms, bonded together to form a cube. Through the partially reflecting treatment applied on the hypotenuse of one of the two prisms, it is possible to distribute the amount of reflected and transmitted light.

For more details on the type of treatment that can be applied, consult our coating catalog.

Dove’s Prism or derotatore

Dove's prism, with its classic trapezoidal shape, is typically used to achieve a reversal of image within terrestrial viewing instruments.

Prisma of Friends or "on the roof"

This type of prism, characterized by two glossy surfaces placed at a perfect 90 ° angle between them and separated by an almost invisible edge, can be applied in the most disparate fields and can allow up to 4 internal reflections.

Babinet compensator

Allows the realization of all phase differences (including zero) and is made of two quartz wedges placed in contact with each other.

Soleil compensator

It allows a constant phase difference over the whole field of view: it too is composed of two suitably facing quartz wedges.

Prism of König

This is an erector prism used as a valid alternative to Porro's prism when maintaining the beam in line. As a type of prism, it is composed of 2 bonded prisms, one of which is equipped with a roof for the transverse inversion.