Sure, you can do that. But, in such a simple case, why not simply use glob with the appropriate pattern? Something like this: 
my @files = glob ("$dir/*_0828900840_*D602BG");

[download]
Update: this had already been suggested by choroba, sorry for duplication.

In reply to Re^2: Pick up specific file name by Laurent_R
in thread Pick up specific file name by JobyJ

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