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In the coming chapters, I will compare several methods of centering lenses where one degree of freedom is constrained. To keep things simple, all examples use a single plano convex lens with fixed tilt and decenter, assessed using a common measure of centering quality. The examples are presented in two dimensions, though the principles extend […]

This chapter takes a different approach than the previous ones. Rather than diving into a specific technical procedure, I want to share my overall view of opto-mechanical alignment. This perspective was recently prompted by a request to review a journal paper on the subject. After a quick look at the paper, I honestly did not […]

Capital equipment decisions demand rigorous financial justification. When precision optical alignment challenges consume your lab’s time and budget, determining whether a Point Source Microscope delivers adequate return on investment requires examining multiple cost factors, time savings, and performance improvements. At $23,950 for a complete system including Python-based PSM Align software, the Point Source Microscope represents […]

I was never satisfied with my explanation of lens centering, so this Chapter is another try. Start with a diagram that is familiar to anyone who has some familiarity with optics, the diagram that explains first order image formation as in Fig. 1. Fig. 1 A generic optical system with the two rays that define […]

The establishment of a stable and well-defined reference axis is fundamental to precise optical alignment. Although the idea has been implicit in earlier chapters, it deserves explicit treatment because its practical implementation is not always obvious. Consider a point focus—such as the free-space output of a single-mode fiber or its image formed by upstream optics—located at height h above the […]

Optical alignment errors cost research labs and manufacturing facilities thousands of dollars in wasted time, scrapped components, and delayed project timelines. A single misalignment can cascade into weeks of troubleshooting, missed deadlines, and compromised optical system performance. After decades of developing precision alignment tools and working with research institutions worldwide, we’ve identified the most common—and […]