Shutter for ccd imager
AssigneeE2V Technologies (UK) Limited
InventorsRoger John Pittock, Raymond Thomas Bell
Life of this patent
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Abstract
A CCD sensor has a shutter to prevent frame shift smear during transfer of an image from the image region to a store region. The CCD sensor has an extended dynamic range, because each integration is in two parts, the second part of which has a different sensitivity than the first part. In order to avoid an asymmetry in the uncovering and covering of the image region, a two-bladed shutter is used.
Claims7
A shutter for a CCD having an image region, wherein the image region has a different capacity over a second portion of each integration than over a first portion, comprising a pair of blades mounted for rotation about an axis and arranged so that the image region is uncovered by the trailing edge of the second blade and covered by the leading edge of the first blade, to allow the first portion of integration to take place, and uncovered by the trailing edge of the first blade and covered by the leading edge of the second blade, to allow the second portion of integration to take place.
Dependencies are inferred from the claim text.