Mislim da je u ovom kontekstu (safety) u pitanju 'safety screen'
To bi bila zaštitna rešetka kao na ovoj slici npr.:
http://www.wisconsinhistory.org/whi/fullRecord.asp?id=8096&q...
Child Worker Removing Twine from Machine - Safety Screen Added

ili zaštitna zavesa/pregrada kao npr. ovde;
http://www.tdt-technology.co.uk/machine-tool-guards/lathe/sa...
The OM machine guard is a transparent safety screen to ensure good protection for the machine tool operator against swarf and other debris.

Ovde je 'screen' podveden pod curtain:
http://www.bannerengineering.com/en-US/products/6/Machine-Sa...
Safety Light Curtains (Type 4)

Safety light curtains protect personnel from injury and machines from damage by guarding points of operation, access, areas and perimeters. Type 4 light curtains meet CE requirements.
...
EZ-SCREEN­ Safety Light Curtain Systems
Non-contact machine guarding systems protect fingers, hands and ankles, and guard perimeters and access, using self-contained emitters and receivers without a separate control box.

Mislim da je zaštitna zavesa možda najopštiji pojam:
http://www.mfagro.co.rs/rs/kosacice/kuhn-gmd-66-55-44.html
Zastitna zavesa

screen - fina mrežica, zaštitna rešetka, mrežica; ref. Enciklopedijski rečnik motora i motornih vozila, A. Jovanović