https://github.com/senthurayyappan/spec-shield

spec-shield is a curvature adjustable face shield that tackles undesirable reflections and can be mounted on spectacles.
https://github.com/senthurayyappan/spec-shield

coronavirus covid covid-19 face-mask face-shield spec-shield

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spec-shield is a curvature adjustable face shield that tackles undesirable reflections and can be mounted on spectacles.

• Host: GitHub
• URL: https://github.com/senthurayyappan/spec-shield
• Owner: senthurayyappan
• Created: 2020-07-22T05:35:23.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-07-23T17:51:13.000Z (almost 5 years ago)
• Last Synced: 2025-05-11T16:02:12.524Z (6 days ago)
• Topics: coronavirus, covid, covid-19, face-mask, face-shield, spec-shield
• Language: G-code
• Homepage:
• Size: 12 MB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# spec-shield

![header-image](images/assembly.jpg)

spec-shield is a curvature adjustable face shield that tackles undesirable reflections and can be mounted on spectacles. 

# Design space exploration

The curvature of the face shield is modelled as a parabola with a fixed arc length between the mounting points.

![design-space](images/rays.gif)

The entire design space is explored for curves that prevent undesirable reflections and optimal design variables are chosen.

# Preliminary design

## Design variables:

* Width of frame, 2*fw = 67.5mm

* Mounting offset, fh = 20mm

* Mounting point (x), mx = 10mm to 30mm

* Mounting point (y), my = 15mm

  

![preliminary-design](images/iso_sketch.png)

# 3D Printed components

## Parameters:

* Layer height = 0.12mm

* Nozzle diameter = 0.4mm

* Infill = 100%

G-codes can be found here: [gcodes](gcode)

![parts](images/parts.jpg)

![sub-assembly](images/sub-assembly.jpg)

# spec-shield

![spec-shield](images/spec-shield.jpg)

This is merely a working prototype and contributions are welcome.