Published Papers
Chapter 23 Alignment of Convex Surfaces
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 […]
Chapter 22 – Simulation of the alignment of a Cooke triplet using a Bessel beam reference
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 […]
Chapter 21 – Bessel Beam Alignment of a Single Lense
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 […]
Chapter 20: Aligning Off-Axis Parabolas with a Bessel Beam — It’s Much Easier
Introduction In Chapter 18, I described aligning off-axis parabolas (OAPs) by placing the focus of a test instrument at the OAP’s focus and autoreflecting off a plane mirror. Although I suggested some tips to ease the process, the initial alignment—getting the reflected light back into the test device’s objective—remains challenging. Because I’ve found that using […]
Chapter 19 – Microscope Objective to Tube Lens Alignment
The subject of this Chapter is prompted by several questions over the last couple of months concerning the alignment of tube lenses to high power microscope objectives. In most microscopes these days the objectives are designed as finite to infinite conjugate optics so there is a need for a “tube” lens to focus the object […]
Systematic Method of Optical Alignment Using Aberrations
We use a known optic, a catalog off-axis parabola, as a reference to both model in Zemax and to align while tracking the position of the focus in 3 degrees of freedom (DOF) and the tilt of the auto-reflecting flat in 2 DOF to demonstrate a systematic approach to alignment. The aberrations present at each step of the experimental procedure are monitored using an autostigmatic microscope.
Recent Posts
- Chapter 23 Alignment of Convex Surfaces
- Chapter 22 – Simulation of the alignment of a Cooke triplet using a Bessel beam reference
- Chapter 21 – Bessel Beam Alignment of a Single Lense
- Chapter 20: Aligning Off-Axis Parabolas with a Bessel Beam — It’s Much Easier
- Chapter 19 – Microscope Objective to Tube Lens Alignment