spectrohelioscope
Concise Oxford English Dictionary © 2008 Oxford University Press:
spectrohelioscope /ˌspɛktrə(ʊ)ˈhiːlɪəskəʊp/
▶noun a device similar to a spectroheliograph for observing the sun directly.
'spectrohelioscope' also found in these Oxford entries:

