发明名称 |
OPTISCHE LESEEINRICHTUNG FUER OPTISCHE AUFNAHMETRAEGER. |
摘要 |
A device for optically reading a recording medium is provided, in which a polarization beam separator includes a transparent plate having a phase network associated with a birefringent material, the refraction index of this material having a first refraction index for the polarization of an incident beam and a second refraction index for the polarization of a reflected beam. Thus, in accordance with the embodiment, the detection devices are placed substantially along the emission axis of the optical source. |
申请公布号 |
DE3772426(D1) |
申请公布日期 |
1991.10.02 |
申请号 |
DE19873772426 |
申请日期 |
1987.04.07 |
申请人 |
THOMSON S.A., PUTEAUX, FR |
发明人 |
LEHUREAU, JEAN-CLAUDE;MOUREY, BRUNO;MAGNA, HENRIETTE, F-75008 PARIS, FR |
分类号 |
G02B5/18;G02B5/30;G02B27/28;G11B7/09;G11B7/12;(IPC1-7):G11B7/135;G11B7/08 |
主分类号 |
G02B5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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