Project brief
This proposed stage would support repeatable focus experiments by positioning a flat optical target along a defined axis. The work would combine a guided mechanical stage, target holder, distance reference, and a software routine for comparing image sharpness under fixed settings. CAD would emphasize target squareness, backlash awareness, adjustment access, and a clear camera-to-target datum. The software would preserve camera settings and image identifiers so that results from different positions remain comparable. Proposed deliverables include the stage assembly, an acquisition checklist, and an image-analysis notebook. The concept would explore relative focus behavior and setup repeatability without claiming lens calibration accuracy, precision metrology performance, or an established production alignment process.
Design concept developed for this portfolio. The diagrams describe the proposed system; implementation and testing are part of the validation plan.
The engineering challenge
Move a target through focus while keeping alignment and acquisition settings consistent enough for meaningful comparisons.
Engineering approach
- Define camera and target reference datums.
- Design guided travel and an adjustable target holder.
- Capture image settings with stage position.
- Compare sharpness measures on controlled image sets.
Validation plan
- Repeat a position sequence in both directions to expose backlash.
- Confirm target alignment before comparing focus.
- Test image metrics against deliberately defocused reference images.
Concept scope
- Axial target travel
- Squareness adjustment
- Position reference
- Fixed-setting image capture
- Sharpness comparison notebook
Software & engineering tools
FreeCAD, OpenCV, Python, Linear stage components, Calibration target