Zight Mirror Blanks

Making a telescope from a circular glass blank is a rewarding and fulfilling DIY project that allows you to create a custom telescope tailored to your specifications. With some basic tools and materials, you can transform a plain glass disk into a fully functional telescope mirror that will provide years of stargazing enjoyment.

The first step in making a telescope mirror from a circular glass blank is to shape and grind the glass to the desired curvature. This process, known as “rough grinding,” involves using coarse abrasives such as silicon carbide grit to remove material from the glass and create the desired curve.

Once the glass has been rough-ground to the correct shape, the next step is to fine grind and polish the surface to achieve the desired optical figure. This process requires patience and precision, as even minor errors can result in optical aberrations and image distortion.

After the mirror has been polished to a smooth, optically precise surface, it must be coated with a reflective material to enhance its light-gathering capabilities. Most amateur astronomers use aluminum or silver coatings applied via a process known as “mirror coating” to achieve the desired reflectivity.

Finally, the completed mirror must be mounted in a telescope tube and aligned with an eyepiece to form a functional telescope. Depending on your preferences and requirements, you can choose to build a Dobsonian, Newtonian, or other telescope design to house your custom-made mirror.

By following these steps and exercising care and precision throughout the process, you can create a high-quality telescope mirror from a simple circular glass blank. With your homemade telescope in hand, you’ll be ready to explore the wonders of the universe and unlock its secrets with your own two eyes.