3D multi-colour storing optical head

Application Number: 00109128
Application Date: 2000.06.09
Publication Number: 1270388
Publication Date: 2000.10.18
Priority Information:
International: G11B7/12;G11B7/135
Applicant(s) Name: Qinghua Univ.
Inventor(s) Name: Xu Duanshuo;Li Hexiong;Ma Lijun
Patent Agency Code: 11201
Patent Agent: luo wenqun
Abstract A 3D multi-colour storing optical head is composed of light gathering unit, reflector, colour difference eliminating object lens and light splitter. Said light gathering unit consists of laser, directional optical coupler and optical fibre for connecting them. Said light splitter is composed of holographic concave diffraction raster and probe head. The emitted light beam is reflected by reflector and then passed through object lens to be focused onto raster on colour optical disk. The light beams in different wavelengthes are reflected to probe head. With said optical head,the multi-layer multi-stage colour optical disk can be read or written,so increasing its R/W speed and storage capacity.