Lub hom phiaj ntawm kev tsim cov iav tsom iav Air-Spaced yog kom txo qhov aberration thiab ua tiav qhov me me tshaj plaws. Cov iav tsom iav triplet achromatic raug kho xim; ob qho tib si laser beam ua haujlwm thiab kev tshuaj xyuas pom beam yuav tsom mus rau tib qho chaw tsom mus rau lossis ob qho ze tshaj plaws.
Wavelength tau tsom mus rau kev muab cov khoom siv kho qhov muag siab rau 20 xyoo