The phrase "a etalon" is not correct in standard written English; it should be "an etalon." You can use it when referring to a standard or reference device in optics or metrology.
Example: "The laboratory used an etalon to ensure the precision of their measurements."
Alternatives: "a standard" or "a reference."
As a proof of concept, the researchers used their system to measure the spectral signature of not a chemical sample but an optical device called an etalon, made from a wafer of gallium arsenide, whose spectral properties could be calculated theoretically in advance, providing a clear standard of comparison.
The reflected light is captured and split into two beams, one of which passes through a glass cylinder known as an "etalon".
It consists of two highly reflective and strictly parallel plates called an etalon.
An optical interferometer with an etalon scanning system was used at KRISS.
Urotropine was used as an etalon for higher confidence.
The calibration curve was obtained with an etalon solution containing 13.44 mg formazan per 50 mL solution.
Shiokawa et al. (2012) achieved the multi-point observation of the thermosphere using three small-aperture FPIs with an etalon diameter of 70 mm.
Next we compare our findings with the results obtained using the evaluation of a maximal Lyapunov exponent that was presented in detail in [27, 28] which we consider as an etalon.
The slab, acting as an etalon resonator, more than doubles the effective optical path that the probe light travels inside the slab, increasing the resonator sensitivity to optical effects.
We have recently updated network tools for investigating West Eurasian mtDNA CR sequences [17] and present here an etalon file representative of West African CR sequences in conjunction with an adapted filter file.
