The shading plate is assembled on the lamp holder and positioned between the illuminating part and the lens, and is used for shading partial light emitted by the illuminating part.
该遮光板组装在该灯座上并位于该发光件与透镜间，该遮光板用于遮挡发光件所发出的部分光线。
2
Volume holographic grating, used as a volume holographic imaging lens in the imaging system, is recorded via illuminating the recording medium with a spherical signal beam and a plane reference beam.