olemus
sõltub kontekstist

biomeetrias
ISO/IEC 19794:
baaspind, millele pannakse käsi ta kujutise hõive ajal,
sageli on varustatud juhikutega,
korratava paigutuse hõlbustuseks
= reference surface on which a hand is placed during imaging
Note. The platen will often contain alignment pins to promote repeatable finger placement.

näiteid
https://cdn2.bigcommerce.com/server2700/585df/products/107/images/223/Biometric_HandPunch_Time_Clock__39314.1303328133.1280.1280.jpg

https://en.wikipedia.org/wiki/Platen
(the Other Applications subsection)