Connect wireless headphones to soundbar

The LG-42PJ150 television has a digital optical audio output
so there's no problem connecting it to the soundbar with an optical cable... the soundbar itself has an optical input.
As for connecting a wireless headset?
neither device has an analog output for a 3.5mm jack or RCA.
Regarding potential Bluetooth connection, you'll need to check if the television has the LG Sound Sync function
https://www.lg.com/fr/support/regarder-tutoriels-videos
If not... you'll need to consider an optical splitter with one input and two outputs (one for the soundbar and the other for the headset)
If the future headset has an optical input, there’s no problem; if it doesn't, you will need a digital optical to analog 3.5mm and/or RCA converter.
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 It’s very difficult to catch a black cat in a dark room.
                              Especially when it's not there...

Thank you very much for your help. Does this mean that I need to pair the headphones with the TV, and not the soundbar? But will I still get the sound quality of the soundbar in the headphones?

My soundbar is connected to the TV via optical, I can't use its Bluetooth link to pair headphones, it's not that simple?

I'll check if the TV has the option you mentioned.

Hello,
To attempt an answer, it is essential to know the references ...
From the soundbar
of the television if the bar does not offer the possibility
and finally of the headset.
See you later

--

 Very difficult to catch a black cat in a dark room.
                              Especially when it's not there...

Oh yes, thank you!

The TV: LG 42PJ150 (manufactured: July 2010)

The soundbar: Sony SA-CT80

Are these details sufficient for someone to give me an informed opinion?

Thank you in advance.

Thank you for your response.
I have thoroughly searched the menu of my television, but I cannot find anywhere the mention of the synchronization function you mentioned.
Could you then explain to me simply and clearly what I need to do to capture the sound via a wireless headset on this setup, preferably with specific buying suggestions?
Thank you so much for your patience.

You will need to consider an optical splitter
one input two outputs (one to the soundbar and the other to the headset)
If the future headset has an optical input, there is no problem; if not, you will need an digital optical to analog jack3.5 and/or RCA converter
Headset with optical cable input https://www.amazon.fr/Sony-MDR-DS6500-Casque-Num%C3%A9rique-Surround/dp/B004OXXE9I/ref=sr_1_3?ie=UTF8&qid=1523281186&sr=8-3&keywords=casque+audio+sans+fil+prise+optique
--

 Very difficult to catch a black cat in a dark room.
                              Especially when it's not there...