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Transverse flutes made out of animal bones were used in Europe in the Paleolithic era. These instruments can certainly be regarded as the ancestor of the flute. However, it was not until the sixteenth century during the Renaissance period that the prototype of the flute that plays such a prominent role in the modern orchestra first emerged and came into widespread use. The term "flute" was originally applied both to pipe instruments held sideways and pipe instruments held vertically. Thus, the vertically held recorder was also called a "flute." Indeed, up until around the middle of the eighteenth century (the era of Baroque music), the word "flute" was commonly used to describe the recorder. To distinguish the transverse flute from the recorder, it was referred to in Italian as the flauto traverso, in German as the Querflöte, and in French as the flûte traversière-all of which mean "sideways held flute."

Various refinements have been added to the flute since the Renaissance period. Early flutes did not feature keys. Flutes in the Renaissance period were of extremely simple construction, consisting of a cylindrical body with an embouchure hole (mouthpiece) and seven finger holes. They could also only produce certain semitones. In the latter half of the seventeenth century, flutes with a conical body and a single key attached began to appear. With this mechanism, for the first time virtually all semitones could be played on the flute. Today this instrument is known as the "baroque flute."

The 74025 Grating Assembly is designed for installation into the Oriel® Cornerstone 130 family of monochromators. This 30 x 30 mm grating comes bonded to a mount, allowing it to be installed inside the instrument. The grating efficiency exceeds 20% over its entire operating range, with a peak efficiency exceeding 75% at its blaze wavelength. This Grating Assembly may be installed in the field, after which the grating must be aligned and calibrated. However, it is suggested to return the instrument to Newport for grating installation and calibration. During recalibration, the instrument is thoroughly assessed to ensure optimal performance and routine maintenance services are performed. The monochromator is returned with a Certificate of Calibration, guaranteeing the instrument meets or exceeds it specifications.

Theobald Boehm, the German wind instrument manufacturer, demonstrated a revolutionary new type of flute at the Paris Exhibition of 1847. This flute had a metal tube with numerous keys attached. With earlier flutes, it had been difficult to even get a note out of them, and the intervals between the notes had been variable. Boehm's instrument was a dramatic improvement, however, and overcame these shortcomings. With his major refinements, Boehm essentially created the modern-day flute.

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