You progressively move down to finer grits of aluminum oxide (such as 12-micron, 9-micron, and 5-micron powders). This smooths out the deep pits left behind by rough grinding. Each surface must be checked consistently with a spherometer to guarantee the radius of curvature matches the prescription exactly. 4. Polishing and Pitch Lap Construction
Can be made from aluminum, fiberglass, or heavy-duty phenolic tubing.
For a more detailed guide, you can find Norman Remer's plans and instructions in PDF format online. Some popular resources include:
This is where the "new" part of your search comes in. A "new" approach is required. And it's one that Remer's book actually provides: you must become the designer. making a refractor telescope norman remer pdf 12 new
Since Remer didn't provide a ready-made plan for a 12-inch, you're going to have to step up and use his to create one. This is the most authentic, rewarding path forward.
Aluminum is standard, but some modern builders use PVC for smaller projects or Carbon Fiber for larger ones.
Every prescription details the exact radius of curvature for all four lens surfaces (R1, R2, R3, and R4). It also covers the target lens thicknesses and necessary air-space gaps. You progressively move down to finer grits of
Building a refractor requires a deep understanding of optical alignment and mechanical precision. The process can be broken down into four distinct phases. 1. Optical Design and Glass Selection
The book you are looking for is likely: Making a Refractor Telescope Author: Norman Remer Publisher: Willmann-Bell (often associated with the "new" standard in telescope making guides).
Using a Foucault tester in the dark, looking for that perfect, elusive curve where light behaves exactly as it should [6]. Some popular resources include: This is where the
THE ACHROMATIC DOUBLET LENS Crown Glass Lens Flint Glass Lens (Low Dispersion) (High Dispersion) /\ /\ /\ /\ / \ R1 / \ / \ R3 / \ | |-----> | | | |--------> | | | | | | | | | | \ / R2 \ / \ / R4 \ / \/ \/ \/ \/ [ Air Gap / Foil Spacers / Optical Oil ]
Using cerium oxide on a polyurethane or pitch lap to make the glass perfectly transparent.
The physical book traditionally included a companion CD-ROM featuring specialized Excel spreadsheets. When using updated iterations or modern open-office tools, these spreadsheets allow you to substitute alternative glasses (like Ohara equivalents) and automatically recalculate your parameters. Core Phases of Building a Refractor