AN ANNULAR SHUTTER MIRROR AND ITS MANUFACTURING METHOD AND THE OPTICAL PICKUP DEVICE FOR TWO KINDS OF OPTICAL DISK THEREOF

摘要

The present invention relates to an annular shutter mirror capable of selectively blocking a part of a wide range traveling toward a target from its direction of travel.;The annular shutter mirror according to the present invention has a fixed reflecting means for reflecting at a predetermined angle according to the incident angle of the incident light beam, and formed in parallel in the form of an annular band around the fixed reflecting means to selectively enter the incident light beam according to the presence of the electric field At least one flexible reflecting means for reflecting the light at an angle different from that of the fixed reflection region.