OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SYSTEM
The optical system (OL) is configured from a front group (GA), an aperture (S), and a rear group (GB) arranged in order from the object side along the optical axis, the rear group (GB) having a focusing lens group (GF1) disposed closest to the object side of the rear group (GB) and having a negative...
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| Sprache: | chi ; eng |
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| Zusammenfassung: | The optical system (OL) is configured from a front group (GA), an aperture (S), and a rear group (GB) arranged in order from the object side along the optical axis, the rear group (GB) having a focusing lens group (GF1) disposed closest to the object side of the rear group (GB) and having a negative refractive power, the focusing lens group (GF1) being moved along the optical axis during focusing, the interval between adjacent lens groups being changed, and the distance between adjacent lens groups being changed during focusing. The optical system (OL) satisfies the following conditional expression: 0.50 lt; sT/TLlt; 0.95 where ST is the distance on the optical axis from the aperture (S) to the image plane (I), and TL is the total length of the optical system (OL).
光学系统(OL)由沿着光轴从物体侧依次排列的前组(GA)、光圈(S)以及后组(GB)构成，后组(GB)具有对焦透镜组(GF1)，该对焦透镜组(GF1)配置于后组(GB)的最靠物体侧，且具有负的光焦度，在进行对焦时，对焦透镜组沿着光轴移动，相邻的各透镜组之间的间隔变化，光学系统(OL)满足以下条件式：0.50 |
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