Patent ID: 7697060
Filing Date: 2010-04-13
Classification: G01J,H04N

Abstract:
1. A method for capturing an image with an imaging photometer, the method comprising: positioning a single rotary shutter having an aperture at a first position such that the shutter blocks light traveling along an optical axis from a light source being measured to an image sensor of the photometer, wherein the shutter is between an imaging lens assembly of the photometer and the image sensor; pivotably moving the shutter at a generally constant angular speed to a second position such that the aperture is aligned with the optical axis to expose at least a portion of the image sensor to the light for a first predetermined exposure time; after exposing each portion of the image sensor to the light for the first exposure time, pivotably moving the shutter at the angular speed to a third position such that the aperture is not aligned with the optical axis and the shutter blocks light traveling along the optical axis toward the image sensor; pivotably moving the shutter from the third position back to the second position to expose at least a portion of the image sensor to the light for a second predetermined exposure time without rotating the shutter 360 degrees; and after exposing each portion of the image sensor to the light for the second exposure time, pivotably moving the shutter at the angular speed back to the first position.