Apparatus and method for imaging lens alignment using a virtual test image

An alignment apparatus for aligning a lens module with respect to an image sensor includes a holographic film including a test chart pattern from which a virtual image of the test chart pattern may be generated, and a light source for illuminating the holographic film. An image sensor holder is prov...

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Bibliographische Detailangaben
Hauptverfasser:	Sze, Wui Fung, Chang, Hei Lam, Deng, Jiangwen
Format:	Patent
Sprache:	eng
Schlagworte:	CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHIC PROCESSES OR APPARATUS HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	An alignment apparatus for aligning a lens module with respect to an image sensor includes a holographic film including a test chart pattern from which a virtual image of the test chart pattern may be generated, and a light source for illuminating the holographic film. An image sensor holder is provided for mounting the image sensor and a lens module holder is configured and positioned for mounting the lens module between the holographic film and the image sensor such that the virtual image of the test chart pattern is viewable by the image sensor through the lens module. The virtual image thus viewable by the image sensor through the lens module is located at a virtual distance from the image sensor that is different from a physical position of the holographic film for aligning the lens module with respect to the image sensor.