, ▁for ▁direct ▁observation ▁by ▁the ▁operator , ▁and , ▁option ally , ▁an ▁image ▁recording ▁system ▁such ▁as ▁phot ographic ▁film , ▁do ped ▁Y AG ▁screen ▁couple d ▁C CD s , ▁or ▁other ▁digital ▁det ector . ▁Typ ically ▁these ▁devices ▁can ▁be ▁removed ▁or ▁inserted ▁into ▁the ▁beam ▁path ▁by ▁the ▁operator ▁as ▁required . Wh ile ▁photograph ▁film ▁can ▁record ▁high ▁resolution ▁information , ▁it ▁is ▁not ▁simple ▁to ▁autom ate ▁and ▁the ▁results ▁cannot ▁be ▁viewed ▁in ▁real ▁time . ▁The ▁first ▁report ▁of ▁using ▁a ▁Char ge - C ou ple d ▁Device ▁( CC D ) ▁det ector ▁for ▁T EM ▁was ▁in ▁ 1 9 8 2 , ▁but ▁the ▁technology ▁didn ' t ▁find ▁w ides p read ▁use ▁until ▁the ▁late ▁ 1 9 9 0 s / ear ly ▁ 2 0 0 0 s . ▁ ▁Mon ol ith ic ▁Active - p ixel ▁sens ors ▁( MA PS s ) ▁were ▁also ▁used ▁in ▁T EM . ▁C M OS ▁detect ors , ▁which ▁are ▁faster ▁and ▁more ▁resist ant ▁to ▁radiation ▁damage ▁than ▁C CD s , ▁have ▁been ▁used ▁for ▁T EM ▁since ▁ 2 0 0 5 . ▁In ▁the ▁early ▁ 2 0 1 0 s , ▁further ▁development ▁of ▁C M OS ▁technology ▁allowed ▁for ▁the ▁detection ▁of ▁single ▁electron ▁counts ▁(" count ing ▁mode "). ▁ ▁These ▁Direct ▁Electron ▁Det ectors ▁are ▁available ▁from ▁G atan , ▁F E I , ▁and ▁Direct