Optical Measurement Techniques With Telecentric Lenses

This course on optical 2d-measurement technique has been created during the development of the telecentric lenses from Schneider-Kreuznach. First of all, we had the idea to explain to the "non-optics expert" the differences between normal lenses and telecentric optical systems by introducing the laws of perspective (Chapter 2).

But in the course of writing it became very soon evident that we had to deal with more then only explaining the laws of telecentric perspective. This is because of various reasons:

First of all, there was a need to explain the relationship between the pure mathematical central projection (which is used in optical measurement technique in form of the "linear camera model" - originally developed in photogrammetry) and the ideal optical imaging by Gaussian Optics.

The goal has been to give an answer to the frequently arising question: "what shall be considered as center of projection in optics - the pupils or the principal points?". To this end, it has been necessary to introduce the principles of Gaussian Optics as well as the principles of ray limitations in Gaussian approximation.