Does anyone know how the iris on the Arab world institute move?

Designed by Jean Nouvel in 1987, any information on the mechanism behind the movement of sunshading device?

Does anyone know how the iris on the Arab world institute move?
At first glance, this rectangular structure looks quite minimalist. But the glass exterior is covered with a metallic screen consisting of individual motorized apertures that open like the iris of an eye to let in sunlight or close to keep it out. This inventive fa?ade controls the amount of sunlight that enters the building, keeping it cool when temperatures elevate and flooding rooms with bright rays on sunny days. The design makes references to traditional Islamic architecture, which incorporates carved screens and walls that control shade. Marino says this structure “possesses one of the best, most innovative metal and glass exterior glazings” in the world.





The 16-screen cineplex is housed in a low, rectangular structure from which the projecting pier form is cantilevered. Mr. Nouvel has a thing about technological gimmicks (like the photosensitive irises installed in the facade of the Arab World Institute in Paris; alas, they occasionally break down). For the cineplex, he has installed windows behind the screens. These would be raised and lowered between performances, allowing stunning views of that other great collective art form: the Manhattan skyline. He has also proposed mounting screens on the exterior of the building, which could be used for artists' projects.



***************************

******************

*************

********

*****

*****

*****

****

***

**

*