DecAIM Single Lens Centration Instrument is developed by Xi’an Optical Metrology, mainly faced the single lens centration measuring. Except the centration measuring, the series can also measure EFL and parallelism. DecAIM series use the sample’s excircle as the reference axis, so that it can measure the single lens single sphere reflection centration or the whole sample’s transmission centration. For reflection centration measuring, DecAIM can fit for all wavelength band, but for the transmission centration only for 400-1000nm wavelength.