Invention Grant
- Patent Title: Apparatus and method for imaging lens alignment using a virtual test image
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Application No.: US17671658Application Date: 2022-02-15
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Publication No.: US11695915B1Publication Date: 2023-07-04
- Inventor: Wui Fung Sze , Jiangwen Deng , Hei Lam Chang
- Applicant: ASMPT SINGAPORE PTE. LTD.
- Applicant Address: SG Singapore
- Assignee: ASMPT SINGAPORE PTE. LTD.
- Current Assignee: ASMPT SINGAPORE PTE. LTD.
- Current Assignee Address: SG Singapore
- Agency: Ostrolenk Faber LLP
- Main IPC: H04N5/335
- IPC: H04N5/335 ; H04N17/00 ; G03H1/22 ; G02B27/62 ; G02B3/14 ; H04N23/54 ; H04N23/55 ; H04N23/56

Abstract:
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.
Information query