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Title: Thomas Stewart McKechnie: Innovator in Optical Testing Methods
Introduction
Thomas Stewart McKechnie is a notable inventor based in Albuquerque, NM (US). He has made significant contributions to the field of optical testing, particularly in the development of methods for assessing the quality of convex optical surfaces. With a total of 5 patents to his name, McKechnie's work has advanced the precision and efficiency of optical testing.
Latest Patents
One of McKechnie's latest patents is a "Surface figure test method for large convex optical surfaces." This innovative method involves testing the figure quality of a convex mirror using an optical quality substrate material. The process includes three separate interferometric null tests to generate three independent sets of optical path difference (OPD) data. Null lenses or computer-generated holograms are utilized to correct spherical aberration during testing. The resulting OPD data allows for the calculation of surface figure errors on both the rear and front surfaces of the test optic. The rear surface is typically corrected using a computer-controlled polishing machine, while the front convex surface is adjusted to meet specified surface figure error requirements.
Another significant patent is the "Test method for surface figure of large convex mirrors." This method employs an optical quality substrate material with a convex front surface and a precisely polished rear surface to create a lens. The lens undergoes testing through standard interferometric or wavefront lens-testing methods. Once the desired curvature is achieved, the convex surface is coated. Null testing is accomplished by directing a collimated interferometer beam through a focusing lens designed to counteract the predicted spherical aberration of a perfect convex mirror or lens.
Career Highlights
Throughout his career, McKechnie has worked with various companies, including Exelis Inc. His expertise in optical testing has positioned him as a valuable contributor to advancements in the field.
Collaborations
McKechnie has collaborated with notable individuals such as Jeromy Paul Rezac and Howard N LaValley. These partnerships have further enriched his work and contributed to the development of innovative optical testing methods.
Conclusion
Thomas Stewart McKechnie's contributions to optical testing methods have significantly impacted the industry. His innovative patents and collaborations reflect his dedication to advancing the field of optics.