Diaphragm blade for cameras and method of making the same
AssigneeCopal Company Limited
InventorMisao Yamada
Life of this patent
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Abstract
A diaphragm blade for cameras comprising an opaque blade portion and a filter portion. This diaphragm blade is made by forming a blade portion by depositing a light intercepting substance on a sheet made of a filter material and then cutting the blade portion as including the filter portion off the sheet so that a high quality diaphragm blade having an integral filter may be obtained at a low cost.
Claims9
A diaphragm blade for cameras comprising an ND filter sheet, a blade portion formed by depositing a light intercepting substance on said sheet, and a filter portion integral with said blade portion so as to be effective within a small diaphragm range between F32 and F45.
A diaphragm blade for cameras comprising an ND filter sheet, a blade portion formed by depositing a light intercepting substance on said sheet, and a filter portion integral with said blade portion so as to be effective within a small diaphragm range.
Dependencies are inferred from the claim text.