Published Papers

Choosing the right metrology tool for optical alignment can significantly impact your project’s success, timeline, and budget. Two of the most powerful instruments available are interferometers and Point Source Microscopes (PSM). While both excel at precision measurement, they serve different purposes and offer distinct advantages. At Optical Perspectives Group, we help optical engineers select the […]

Simon P. Tsaoussisa, W. Andrew Chenga, Ronnie Appelsb, and Robert E. Parksc  aKostaCLOUD Inc., 5795 Commerce Lane, South Miami, FL 33143, USA  bTucson Optical Research Corp., 210 S Plumer Ave, Tucson, AZ 85719, USA cOptical Perspectives Group LLC, 7011 E Calle Tolosa, Tucson, AZ 85750, USA ABSTRACT  We propose a realistic model for tolerancing ofscattered surface […]

In this document, we will describe a general approach/method to measure optical surfaces in reflection and/or transmission when the incoming beam is not a simple plane wave. Among such tests are the Hindle test for measuring convex surfaces and the Ritchey-Common (RC) test for flat, concave, or convex surfaces. We will explain the concept using […]

This chapter may seem out of sequence, but it tackles a recurring challenge that arguably deserved attention in a previous chapter: aligning convex surfaces. These surfaces appear nearly as often as their easier-to-align concave counterparts, yet they’re frequently overlooked—perhaps because they’re more difficult to visualize and work with. But they do exist, and they can’t […]

For some time, I wanted to simulate the assembly of a Cooke triplet using a Bessel beam as a reference,and assuming the hardware constrained the alignment of each element to either a tilt or decenter as isthe case for many precision lens assemblies. A new optical design software is now available that makesthis modelling relatively […]

Introduction: In Chapters 14 and 15 I explained how a Bessel beam is used to align optics when you have all the necessary degrees of freedom to fully align the optics in tilt, decenter and focus. Many times, you have physical constraints due to the hardware the optics are installed in, so you don’t have […]