METHODS AND DEVICES FOR ACTIVE ATHERMALIZATION AND LENS POSITION INDEXING

Devices for active athermalization and lens position indexing include an image capture device that includes a lens assembly, a lens mount, a memory, a printed circuit board (PCB), an image sensor, a temperature sensor, and actuator, and a processor. The memory stores a calibration look up table (LUT...

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Bibliographische Detailangaben
Hauptverfasser:	Stern, Jonathan, Griggs, Ian, Finkel, Paul
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	Devices for active athermalization and lens position indexing include an image capture device that includes a lens assembly, a lens mount, a memory, a printed circuit board (PCB), an image sensor, a temperature sensor, and actuator, and a processor. The memory stores a calibration look up table (LUT) that includes focus positions across a temperature range. The image sensor may be disposed on the PCB. The temperature sensor measures a temperature of the lens assembly. The processor determines a position of the lens assembly relative to the image sensor to maintain a focus point over the temperature range based on the calibration LUT, the measured temperature, or both. The processor may be configured to transmit a control signal to the actuator to modify the position of the lens assembly relative to the image sensor to maintain the focus point based on the measured temperature.