Yes, ORTHICONS is a Scrabble word!

Letter values in Scrabble US: O 1, R 1, T 1, H 4, I 1, C 3, O 1, N 1, S 1.

Is it a valid word?

ORTHICONS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons

Also: image orthicon.