The DT230-B120A0,5-UV from Photon Lines is an Acousto-Optic Frequency Shifter that operates at a wavelength of 400 nm - 450 nm. It has a frequency shift of 230 ± 60 MHz and resolution of 500 nm. This linearly polarised acousto-optic frequency shifter has a deflection angle range of 11.4 (at 400 nm) and an efficiency above 50%. It uses TeO2 material and has an aperture size of 0.5 mm x 17.5 mm.