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Related Experiment Video

Updated: Sep 22, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
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3D-Printable and open-source modular smartphone visible spectrophotometer.

Brandon J Winters1, Nick Banfield1, Cassandra Dixon1

  • 1Bethel University, St. Paul, MN United States.

Hardwarex
|May 24, 2022
PubMed
Summary
This summary is machine-generated.

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A new open-source, 3D-printable spectrometer offers sophisticated capabilities at a low cost. This modular instrument breaks from "black box" designs, increasing accessibility for scientific research and education.

Area of Science:

  • Scientific Instrumentation
  • Spectroscopy
  • Open-Source Technology

Background:

  • Technological advancements like 3D printing and open-source electronics have accelerated instrument design.
  • There is a growing need for affordable, sophisticated scientific equipment.
  • Existing spectrometer designs often operate as "black boxes," limiting user understanding and modification.

Purpose of the Study:

  • To describe the design of a novel 3D-printable, open-source, modular spectrometer.
  • To present an instrument that overcomes barriers to scientific equipment access.
  • To demonstrate a low-cost alternative to commercial spectrometers.

Main Methods:

  • Designing a modular spectrometer with 3D-printable components.
  • Utilizing readily available parts from local hardware stores.
Keywords:
3D printingCAD, Computer Aided DesignCitizen scienceComputer aided design (CAD)Internet of things (IoT)IoT, Internet of ThingsLED, Light emitting diodeOpen-sourceOpticsPhotonicsSpectroscopy

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  • Developing the instrument outside the conventional "black box" design paradigm.
  • Testing the spectrometer's capabilities through various use cases.

    • Main Results:

    • Successful design and fabrication of a functional, modular spectrometer.
    • Demonstration of capabilities comparable to commercial-grade equipment.
    • Significant cost reduction compared to commercially available spectrometers.
    • Ease of production using low-end, consumer-grade 3D printers.

    Conclusions:

    • The developed open-source spectrometer significantly lowers the barrier to accessing sophisticated scientific tools.
    • The modular and 3D-printable design facilitates widespread adoption and customization.
    • This instrument represents a viable, cost-effective alternative for research and educational purposes.