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Recently a customer was using the Point Source Microscope (PSM) to align a slow, singlet objective lens and find its focus.  The customer had a plane retro mirror behind the objective and should have seen a nice round spot at best focus. Instead, he saw a vertical line image as in the following screen shot […]

The Point Source Microscope (PSM) is used to locate the apex of retroreflecting prisms in 3 degrees of translational freedom with a precision of less than 1 micron. The process is easily explained for right angle prisms, as will be done in this paper, but the explanation is valid for cube corner retroreflectors such as those mounted in spherical balls, spherically mounted retroreflectors, or SMRs, for use with laser trackers. With suitable, simple fixtures, the measurements for all 3 directions are made to a precision of < 1 μm in less than 1 minute.

1. INTRODUCTION The premise of this paper is that the only remaining way to improve optical system performance is with better alignment techniques. We feel optical design is a mature field and that little can be done to improve the design of optical systems by improvements to lens design software. The software may become easier […]

OSA Stories  The Optical Society offered Robert (Bob) Parks an opportunity to share his stories of excitement and inspiration in a couple of short videos. (ANNOUNCEMENT FROM THE OPTICAL SOCIETY) OSA CAM VIDEOS We’re Celebrating All Members (CAM) by inviting members attending many OSA meetings and congresses with an opportunity to share their stories. View OSA […]

For the last three years Optical Perspectives Group, LLC (OPG) had a licensing agreement with Trioptics-USA to manufacture and sell OPG products exclusively world-wide. OPTICAL PERSPECTIVES GROUP, LLC (OPG) AND TRIOPTICS-USA MUTUALLY DECIDE TO END LICENSING AGREEMENT  Toward the end of last year it was becoming clear that this arrangement was not in the best […]

1. INTRODUCTION Finding the optical axis of an aspheric surface is an essential part of making an aspheric lens because the center of curvature, or optical axis, of the second side must lie on, or be coincident with, respectively, the optical axis of the first side for maximum optical performance. Looking at the center of […]