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公开(公告)号：EP0762403A2
公开(公告)日：1997-03-12
申请号：EP96306505.7
申请日：1996-09-06
申请人： HITACHI, LTD.
CPC分类号： G11B7/13925 , G11B7/1376 , G11B7/1378 , G11B19/12 , G11B2007/0006
摘要： The present invention comprises an arrangement with removable optical element having a predetermined focal distance in the light path between a light source and an objective lens, so as to insert said optical element into the light path between the light source and the objective lens for playing back or recording onto one type of thickness of disk plates, as well as to remove it therefrom for playing back or recording onto another type of thickness of disk plates.
Alternatively, by retaining variably the distance between the light source and the collimator lens, the distance between the light source and the collimator lens along with the light path is variably changed according to the thickness of the disk plate being inserted. Then by determining the type of the disk inserted and accordingly selectably inserting/removing the optical element, only one objective lens may be used to conform to the disk plates having different thicknesses.摘要翻译： 本发明包括在光源和物镜之间的光路中具有预定焦距的可拆卸光学元件的装置，以便将所述光学元件插入到光源和物镜之间的光路中用于回放 或记录到一种类型厚度的盘片上，并将其从中移出以便重放或记录到另一种厚度的盘片上。 或者，通过可变地保持光源与准直透镜之间的距离，光源与准直透镜之间的距离与光路一起根据插入的圆盘板的厚度可变地改变。 然后，通过确定所插入的光盘的类型并相应地选择性地插入/移除光学元件，可以仅使用一个物镜来适应具有不同厚度的光盘片。
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公开(公告)号：EP0762403B1
公开(公告)日：2003-12-03
申请号：EP96306505.7
申请日：1996-09-06
申请人： Hitachi, Ltd.
CPC分类号： G11B7/13925 , G11B7/1376 , G11B7/1378 , G11B19/12 , G11B2007/0006
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3.发明公开
公开(公告)号：EP0762403A3
公开(公告)日：1997-07-02
申请号：EP96306505.7
申请日：1996-09-06
申请人： HITACHI, LTD.
CPC分类号： G11B7/13925 , G11B7/1376 , G11B7/1378 , G11B19/12 , G11B2007/0006
摘要： The present invention comprises an arrangement with removable optical element having a predetermined focal distance in the light path between a light source and an objective lens, so as to insert said optical element into the light path between the light source and the objective lens for playing back or recording onto one type of thickness of disk plates, as well as to remove it therefrom for playing back or recording onto another type of thickness of disk plates. Alternatively, by retaining variably the distance between the light source and the collimator lens, the distance between the light source and the collimator lens along with the light path is variably changed according to the thickness of the disk plate being inserted. Then by determining the type of the disk inserted and accordingly selectably inserting/removing the optical element, only one objective lens may be used to conform to the disk plates having different thicknesses.
摘要翻译： 本发明包括具有在光源和物镜之间的光路中具有预定焦距的可拆卸光学元件的装置，以便将所述光学元件插入到光源和物镜之间的光路中以便回放 或记录在一种类型的盘片的厚度上，以及将其从中移除，以便播放或记录在另一种厚度的盘片上。 或者，通过可变地保持光源和准直透镜之间的距离，光源与准直透镜之间的距离以及光路可根据插入的盘片的厚度而变化。 然后，通过确定插入的盘的类型并相应地可选择地插入/移除光学元件，可以仅使用一个物镜来符合具有不同厚度的盘片。
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