Introduction: Thomas F Johnston, Jr. is a notable inventor based in Auburn, CA (US). He has made significant contributions to the field of laser technology, holding a total of 13 patents. His work focuses on improving the quality and measurement of laser beams, which has important applications in various industries.

Latest Patents: One of Johnston's latest patents is an "Apparatus for measuring the mode quality of a laser beam." This invention provides a method and apparatus for determining the quality of a multimode laser beam. The apparatus includes a lens that creates a transformed or imaged waist from the input beam. The location and diameter of the transformed beam waist are determined through a process that involves chopping the beam using a rotating hub with apertures. The transmission of the beam past a knife edge is monitored by a detector, allowing for precise measurements. A processor calculates beam quality by fitting these measurements to a mathematical model, enabling predictions of the beam's propagation characteristics.

Career Highlights: Johnston has dedicated his career to advancing laser technology. His innovative approaches have led to multiple patents that enhance the understanding and application of laser beams. His work is recognized for its technical depth and practical implications in the field.

Collaborations: Throughout his career, Johnston has collaborated with esteemed colleagues such as William P Proffitt and Gerald H Williams. These partnerships have contributed to the development of his groundbreaking inventions.

Conclusion: Thomas F Johnston, Jr. is a prominent figure in the field of laser technology, with a strong portfolio of patents that reflect his innovative spirit. His contributions continue to influence the industry and pave the way for future advancements.

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