Neither the violin nor the Eb Sousaphone does.
Example of an optical instrument? (not sample) Microscope.
An optical telescope is the simplest instrument to view the heavens.
Optical or radio telescope
A telescope is an optical instrument used to make distance views and objects appear closer to the user.
Perhaps you are thinking of a radio telescope, although your question is quite open-ended. Voltmeters, frequency counters, and trombones also fit the description.
an optical telescope
telescope
The Hubble Space Telescope has a number of instruments, but the primary one is an optical telescope.
The observatory had not yet opened, so we waited outside until it did.
telescope
Radio Telescope Apex
There is a 3 metre radio telescope on the roof of Cardiff University. There is also an optical telescope at the site for the use of undergraduates.