入射狭缝及光栅固定起来，出射狭缝扫描过罗兰圆。
Entrance slit and the grating are fixed and the exit slit scans across the Rowland circle .
编码模板是阿达玛变换成像光谱仪的关键部件，用以代替入射狭缝和出射狭缝。
Encoding template is a key component of Hadamard transform imaging spectrometer . It is used to substitute the incident slit and exit slit .
出射狭缝