Published Papers

How well can the Point Source Microscope (PSM) find a point in space? A POTENTIAL CUSTOMER FOR A PSM RECENTLY ASKED “WHAT IS THE ACCURACY/REPEATABILITY OF ALIGNMENT OF OPTICAL AXIS?” The question is a little ambiguous as to exactly what he was asking for, but my own experience in the lab is that the PSM […]

I am sorry to say I did not get to meet any of you personally at either the SPIE Optics and Photonics show in San Diego or the American Society for Precision Engineering Exhibit scheduled for Minneapolis in October. THE CENTERING STATION DOES PRECISION CENTERING WITHOUT THE NEED OF A ROTARY TABLE. THIS MAKES CENTERING […]

DURING THE SPIE OPTICS + PHOTONICS FREE DIGITAL FORUM (ONLINE ONLY) AUGUST 24-28 2020, ROBERT (BOB) PARKS PRESENTED TWO NEWLY PUBLISHED PAPERS.  SEE THE PRESENTATION BY GOING DIRECTLY TO SPIE EXHIBITOR FORUM

DURING THE SPIE OPTICS + PHOTONICS FREE DIGITAL FORUM (ONLINE ONLY) AUGUST 24-28 2020, ROBERT (BOB) PARKS PRESENTED TWO NEWLY PUBLISHED PAPERS.  SEE THE PRESENTATION BY GOING DIRECTLY TO SPIE EXHIBITOR FORUM

Methods of centering without using a precision rotary table to establish a reference axis in space are several times faster than with a rotary table. However, finding an optimum method of establishing an alternative reference axis is challenging. We look at the small class of centering situations involving the precision cementing of doublets to illustrate the advantages of using a Bessel beam as the reference axis. Two approaches to centering illustrate the method: one involving first aligning the meniscus element and then adding the positive element, and the other, cementing the two elements and aligning the pair.

ABSTRACT Bessel beams have found use in the alignment of transmissive optics for some time. They are also used for the alignment of reflecting optics when used in the imaging mode, that is, when the wavefront is near spherical. However, there are cases where it would be useful to use the Bessel beam for alignment […]