Defocusing device for optical systems
阅读：599发布：2023-03-31
专利汇可以提供Defocusing device for optical systems专利检索，专利查询，专利分析的服务。并且To produce a totally blurred image in the dissolution of a moving-picture scene, a camera objective of the varifocal type is provided with an iris diaphragm whose leaves consist of lightscattering translucent material.，下面是Defocusing device for optical systems专利的具体信息内容。
1. In a camera objective having rear lens means and front lens means spaced apart along an optical axis, the combination therewith of a blurring diaphragm with a mounting ring centered on said axis and interposed between said front and rear leans means, said blurring diaphragm having a circular array of iris leaves of light-scattering translucent material pivotally mounted on said ring and symmetrically movable toward said axis for defocusing an image projected by said front and rear leans means; an iris diaphragm with opaque leaves aligned with said blurring diaphragm and disposed between said front and rear lens means beyond said blurring diaphragm as seen in the direction of incident light; sensing means responsive to the light intensity between said diaphragms; and control means for said iris diaphragm responsive to said sensing means for opening said iris diaphragm upon closure of said blurring diaphragm.
2. In a camera objective having rear lens means and front lens means spaced apart along an optical axis, the combination therewith of a blurring diaphragm centered on said axis and interposed between said front and rear lens means, said blurring diaphragm having at least one pair of iris leaves of light-scattering translucent material symmetrically movable toward said axis for defocusing an image projected by said front and rear lens means; an iris diaphragm with opaque leaves aligned with said blurring diaphragm and disposed between said front and rear lens means beyond said blurring diaphragm as seen in the direction of incident light; sensing means responsive to the light intensity between said diaphragms; and control means for said iris diaphragm responsive to said sensing means for opening said iris diaphragm upon closure of said blurring diaphragm.
3. The combination defined in claim 2 wherein said translucent material is synthetic-resin foil.
4. The combination defined in claim 2, further comprising an additional lens interposed between said diaphragms.
5. The combination defined in claim 4 wherein said additional lens has near-zero refractive power.
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