Invention Grant
- Patent Title: Apparatus and method for improving contrast detected in a fringe projection autofocus system
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Application No.: US13746229Application Date: 2013-01-21
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Publication No.: US09237261B2Publication Date: 2016-01-12
- Inventor: Eric Peter Goodwin
- Applicant: Nikon Corporation
- Applicant Address: JP
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP
- Agency: Quarles & Brady LLP
- Agent Yakov Sidorin
- Main IPC: H04N5/225
- IPC: H04N5/225 ; H04N5/357
Abstract:
A method and apparatus are provided, for improving contrast detected in a fringe projection autofocus system that projects light from a substrate to a digital camera. The method and apparatus reduce the fill factor of the digital camera in a direction that improves the contrast at spatial frequencies near or above the Nyquist limit in that direction.
Public/Granted literature
- US20130188084A1 Apparatus and method for improving contrast detected in a fringe projection autofocus system Public/Granted day:2013-07-25
Information query
