Blog
What Belongs in an Optical Alignment Checklist?
An optical alignment checklist should identify the assembly, reference datums, measured optical features, instrument settings, acceptance limits, and results before and after final fixation. It should also point to the saved data and images that another engineer needs to verify the work. A centered spot is useful feedback; a complete record explains what that spot […]
Bessel-Beam-Based Hybrid Physics-Informed Phase Retrieval from Single-Shot Measurements
Authors: Zhaowei Chena, Ryan Luua, Robert E. Parksb, Surya Prakash Gurunarayananc, and Daewook Kima,* ABSTRACT We present a deep-learning-based phase-retrieval framework that uses Bessel-beam illumination to extend the recoverable aberration range in wavefront sensing. By exploiting the large effective numerical aperture and extended depth of focus of Bessel beams, the proposed method increases the range […]
Bessel beam alignment of a single, partially constrained lens element
ABSTRACT In many lens assemblies, mounting constraints prevent independent adjustment of tilt and decenter making perfect alignment of individual elements impossible. This work models a plano-convex lens to compare several centering methods under partial constraint, including mechanical edge runout, image runout, center of curvature centration, and transmitted Bessel beam deviation. Although based on a single […]
Recent Posts
- What Belongs in an Optical Alignment Checklist?
- Bessel-Beam-Based Hybrid Physics-Informed Phase Retrieval from Single-Shot Measurements
- Determining Centering and Tilt Tolerances for Your Optical System
- Bessel beam alignment of a single, partially constrained lens element
- Understanding Opto-Mechanical Alignment in Optical System Design