Based on Seya-Namioka Mounting and Johnson Mounting, the new design is characterized by choosing a more suitable position of the rotation axis and selecting two wavelengths for spectrum correction. The method employed is similar to that of the three point ganged tuning. 设计的基本思想是在濑谷-布岗(Seya-Namioka)和Johnson装置的基础上另选转轴的位置,并选用两个标准波长来校正光谱,这类似于三点统调法。