45 lines
2.1 KiB
Markdown
45 lines
2.1 KiB
Markdown
# RickPrompter
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A DIY teleprompter built for the [Tangent Heavy Industries](https://tangentheavy.com) channel:
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a laser-cut 5 mm plywood hood, a picture-frame glass beamsplitter at 45°, a tablet lying flat
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underneath, and a Pixel 6 shooting through the glass from behind.
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## Files
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| Path | What |
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| `CAD/RickPrompt.FCStd` | FreeCAD source model (all panels, assembled) |
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| `CAD/RickPrompt-Pixel 6 Holder.step` | Pixel 6 phone holder |
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| `CAD/STL/` | One STL per body, exported in assembly position. The model has one side panel; `Side-Mirrored.stl` is the generated opposite side. |
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| `Documents/Images/` | Renders |
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All dimensions are in millimetres.
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## Design notes
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- **Beamsplitter:** 12x16 in picture-frame glass (clear, *not* "non-glare"/etched). Acrylic was
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rejected: the camera shoots through the pane, so any waviness, sag or scratch haze ends up in
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the footage. Thinner glass keeps the ghost image closer to the main one. Use large type.
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- **Orientation:** 16 in horizontal, 12 in up the slope. The Pixel 6 main lens is wide
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(~82° diagonal), and width is the binding constraint. Keep the lens close to the glass,
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roughly 135-185 mm from the glass centre.
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- **Screen tray recessed ~38 mm** below the glass's low edge. The bottom of the camera's view
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passes through the pane and continues down-forward. A screen sitting in that wedge ends up in
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frame and shines straight into the lens.
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- **Measure your camera's real video FOV before cutting.** Put the phone 600 mm from a wall, record,
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and mark the frame edges: `tan(half-angle) = width / 1200`.
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## Known issues (first shoot)
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- The top edge of the glass showed in frame. The fix is to slide the pane 25-40 mm further up the
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same 45° plane; the hood ceiling and low-edge rail follow. The model does not include this yet.
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- Silicone does not bond to painted ply. Mount the glass with printed slotted clips instead,
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with the bottom clips carrying the load.
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- For better framing, tilt the whole rig down ~7° rather than lowering the camera.
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## License
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[CC BY-NC-SA 4.0](LICENSE).
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