How to make your own solar eclipse glasses

Making your own solar eclipse glasses requires extreme caution to ensure they are safe for direct viewing of the sun. Improperly constructed eclipse glasses can lead to severe eye damage. Follow these steps to create effective solar eclipse glasses using ISO 12312-2 certified solar viewing film.

Materials Needed for making solar eclipse glasses

1. ISO-Certified Solar Viewing Film
   • This is a special film designed for safe solar viewing, available online or at science supply stores. Ensure it is marked ISO 12312-2 compliant.
2. Sturdy Cardboard or Thick Construction Paper
   • Use this to make the frame.
3. Scissors
   • For cutting the cardboard and film.
4. Non-Toxic Glue or Strong Tape
   • To assemble the glasses securely.
5. Pencil or Marker
   • For tracing.
6. A Template
• You can create your own or use a printable template for a glasses frame.

Instructions for making solar eclipse glasses

Step 1: Create the Frame

1. Draw the Frame:

   • On sturdy cardboard or thick paper, sketch the shape of glasses, including two eye openings. Ensure the frame fits comfortably on your face.
   • Include a nose bridge and arms (or side supports) for added stability.

2. Cut Out the Frame:

   • Carefully cut along the outline of the glasses. Cut out the eye openings as well.

Step 2: Prepare the Solar Film

1. Cut the Solar Film:

   • Using scissors, cut two pieces of solar viewing film slightly larger than the eye openings in the frame. This ensures they can be securely attached.

2. Handle with Care:

   • Avoid scratching or puncturing the film. Damaged film is unsafe for solar viewing.

Step 3: Attach the Film to the Frame

1. Secure the Film:

   • Place a piece of solar film over each eye opening on the back side of the frame.
   • Use tape or glue around the edges of the film to attach it firmly to the frame. Ensure there are no gaps or loose edges.

2. Double-Check:

   • Inspect the film to ensure it is smooth and free of holes or tears. Any damage renders the glasses unsafe.

Step 4: Assemble the Glasses

1. Attach the Arms:

   • If your frame includes arms, fold and tape them in place. Alternatively, use an elastic band to secure the glasses to your head.

2. Test the Fit:

• Place the glasses on your face and ensure the solar film covers your eyes completely.

Testing the Glasses

• Inspect in Indirect Light: Check for light leaks around the edges or through the film.
• Test Safely: Before using the glasses to view the eclipse, hold them up to a bright light source (not the sun) to confirm they block almost all light. You should only see the light source faintly.

Important Safety Tips

1. Do Not Use Regular Sunglasses: Even dark sunglasses are unsafe for solar viewing.
2. Only Use Certified Solar Film: The film must comply with ISO 12312-2 standards for safe solar observation.
3. Inspect Before Use: If the glasses or film are scratched, torn, or damaged in any way, do not use them.
4. Never Look Directly at the Sun Without Protection: Even a brief glance can cause permanent damage.

Alternative: Pinhole Projector

If you're unsure about the safety of DIY glasses, create a simple pinhole projector instead. This indirect viewing method is completely safe and just as fun!

By following these steps, you can safely and responsibly enjoy the solar eclipse while protecting your eyes.

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