Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1992-05-12
1993-09-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2502017, 250566, G01J 120
Patent
active
052451720
ABSTRACT:
An apparatus for focusing an image onto an image receptor is disclosed. The apparatus includes a stationary lens, a rotatable frame that is rigidly connected to the image receptor, and a base. The base is pivotally connected to the rotatable frame about a rotational axis. The image is focused by the stationary lens onto the image receptor by pivoting the rotatable frame about the rotational axis. In an alternate embodiment, an apparatus for focusing an image onto an image receptor includes a stationary lens, a voice coil actuator, a servo loop for driving the voice coil actuator, and an electromechanical transducer for measuring the position of the image receptor. The electromechanical transducer is electrically connected to the servo loop. Connecting means for rigidly connecting the image receptor to the voice coil actuator are also provided. The image is focused by the stationary lens onto the image receptor by driving the voice coil actuator. A method for focusing an image onto an image receptor pivotally connected to a base about a rotational axis is disclosed. The method includes detecting information representative of the distance between a stationary lens and an object being imaged, and pivoting the image receptor about the rotational axis in accordance with the detected information.
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Esslinger Robert
Garland Lance
Mulligan Joseph
Roth Paul
Roth Stephen
Drobile James A.
Golub Daniel H.
Le Que T.
Murray William H.
Nelms David C.
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