Achieve precision in angular measurements with the telescope-mirror-scale method. This practical guide explains how to combine a telescope, a plane mirror, and a movable scale to measure deflections and tangents. It covers the theory of corrections, the difference between primary and secondary uses, and how to manage errors to reach high accuracy.
Designed for applied work, the book provides clear procedures, from preparing the setup to performing a sequence of adjustments and tests. It emphasizes how to compute corrections directly on the observed readings, how to calibrate instruments, and how to interpret results in both relative and absolute terms. The discussed techniques are framed to help you plan measurements, assess precision, and decide when a correction can be safely omitted.
- How to apply fractional corrections to scale readings and to r (distance) for accurate results
- Differences between primary and secondary measurements and when each is used
- A step-by-step procedure for setup, focusing, alignment, and a series of adjustments and tests
- Practical notes on instrument selection, stability, and calibration for consistent results
Ideal for readers who work with precision optical measurements and want a structured approach to reduce errors in tan and related quantities.