# Rings

- Veröffentlicht: 2022-04-21
- Aktualisiert: 2026-05-11
- Autor: Randy Hilgren
- Quelle: https://www.piezosystem.com/products/piezo-actuators-and-stages/actuators/rings/

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## An Open Aperture for Lasers or Mechanics

A ring actuator is similar to a 1-axis stack actuator, except that is has a center aperture for light or instruments to pass through. These are often used in microscopy, laser or other photonic applications.

Piezo-electric ring actuators consists of a large number of contacted ceramic rings.  Based on this design they provide a 9 mm or 14 mm open aperture.

Ring actuators are available with housing, series RA, and without housing, series R.  The R series of actuators are not pre-loaded. For dynamic applications those Actuator have to be pre-loaded. The RA series of actuators are internally pre loaded by a mechanical spring making them ideal for dynamic applications.

High power [hpower ring actuators](https://www.piezosystem.com/product/hpower-rings/) are available.

A closed loop version equipped with strain gauge sensors is available as well.

![Series R Piezo Ring Actuator](https://www.piezosystem.com/wp-content/uploads/2022/04/R-Family-Page-Small-Inset.jpg)

Series R Actuator Pictured

### Specifics:

Ring actuators are capable of generating large forces and can be easily integrated in experimental set-ups and machines.  Due to their high natural frequency ring actuators are perfectly suitable for many scanning applications.

RA actuators with housing are always delivered with a mirror holder.

hpower actuators are high power, high force.

### Ring Characteristics:

Motion up to 130 µm

Open aperture diameter 9 mm to 14 mm

Sub nm resolution

Blocking force up to 20,000 N

µsec response time

Flexible epoxy insulation

![HPSt Series - hpower Ring Actuators](https://www.piezosystem.com/wp-content/uploads/2022/04/hpower-Rings-680x525.jpg)

#### hpower Rings

[show more](https://www.piezosystem.com/product/hpower-rings/)

![Stainless steel cylindrical component with a black opening and attached black cable](https://www.piezosystem.com/wp-content/uploads/2022/04/Series-RA-680x525.jpg)

#### Series RA

[show more](https://www.piezosystem.com/product/series-ra/)

![Piezo Ring Actuator](https://www.piezosystem.com/wp-content/uploads/2022/04/R-680x525.jpg)

#### Series R

[show more](https://www.piezosystem.com/product/series-r/)

## Downloads

- [![](https://www.piezosystem.com/wp-content/themes/wptheme/assets/img/ico-download.svg) Series-R-and-RA-Datasheet.pdf (119 KB)](https://www.piezosystem.com/wp-content/uploads/2022/04/Series-R-and-RA-Datasheet.pdf)
- [![](https://www.piezosystem.com/wp-content/themes/wptheme/assets/img/ico-download.svg) hpower-HPSt-1000-35-25-VS45-Datasheet.pdf (405 KB)](https://www.piezosystem.com/wp-content/uploads/2022/04/hpower-HPSt-1000-35-25-VS45-Datasheet.pdf)
- [![](https://www.piezosystem.com/wp-content/themes/wptheme/assets/img/ico-download.svg) hpower-HPSt-1000-25-15-VS35-Datasheet.pdf (504 KB)](https://www.piezosystem.com/wp-content/uploads/2022/04/hpower-HPSt-1000-25-15-VS35-Datasheet.pdf)
- [![](https://www.piezosystem.com/wp-content/themes/wptheme/assets/img/ico-download.svg) hpower-HPSt-1000-10-5-VS18-Datasheet.pdf (381 KB)](https://www.piezosystem.com/wp-content/uploads/2022/04/hpower-HPSt-1000-10-5-VS18-Datasheet.pdf)