Alteos electrochromic dimmable passenger cabin windows (block up to 99.997 % of visible light, over 70 000 cycles)

Technical specifications

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

The panel is installed between the inner dust cover and the outer structural cabin window. It consists of two thin glass panes with transparent conductive coatings, with an electrochromic gel between them, and is sealed around the perimeter. Under a small constant voltage the gel darkens, and when the voltage is removed it becomes clear. The voltage is changed in small steps, so intermediate transmission levels are also available. The passenger presses a button at the seat and selects a state from bright clear to fully dark. The color stays neutral throughout the transition, the clarity is high and the haze is low at any level. The power supply is low-voltage DC, and if it is lost the window becomes clear. There are no moving parts, and the window is silent and lighter than mechanical shades; it blocks ultraviolet and reduces the transmission of infrared radiation. If needed, the windows are joined by an aircraft network for priority crew control and status monitoring.

How to choose

Alteos is installed instead of plastic shades where smooth light control and no moving parts are needed. The passenger sets the dimming level with the button at the seat, and priority control for the crew appears if the aircraft network is connected. For the transparent plastic itself look at Opticor, and for interlayer films S-123, S-142 and S-158.