John A Tejada

Title: John A. Tejada: Innovator in Projection Lens Technology

Introduction

John A. Tejada is a notable inventor based in Garland, Texas. He has made significant contributions to the field of optical engineering, particularly in the development of advanced projection lens systems. His innovative work has led to the creation of a unique patent that enhances the functionality of reflective spatial light modulators.

Latest Patents

Tejada holds a patent for an "Offset projection lens for use with reflective spatial light modulators." This invention features an offset reverse telephoto projection lens that is telecentric in modulator space. The lens has an air equivalent back focal distance of at least 3.3 inches, with a preferred distance of at least 4.0 inches. The design includes a first objective lens group with negative power and a second telecentric lens group with positive power. The second lens group is telecentric in object space, ensuring that the image of the aperture is focused at infinity, allowing light to converge on the object plane perpendicular to the lens axis. The embodiments of this lens have a back focal distance to effective focal length ratio of at least 0.86:1, with various configurations achieving throw ratios from 1.2:1 to 7:1 and an overall length ranging from less than 5 inches to 12.5 inches.

Career Highlights

Tejada is currently employed at Texas Instruments Corporation, where he continues to innovate in optical technologies. His work has been instrumental in advancing projection systems that are widely used in various applications. With a total of 1 patent, he has established himself as a key figure in the field of optical engineering.

Collaborations

Throughout his career, Tejada has collaborated with talented individuals such as Patrick A. Trotta and Douglas W. Anderson. These partnerships have fostered a creative environment that has led to the development of cutting-edge technologies in projection optics.

Conclusion

John A. Tejada's contributions to the field of optical engineering, particularly through his innovative patent for an offset projection lens, highlight his expertise and commitment to advancing technology. His work at Texas Instruments Corporation and collaborations with fellow engineers further underscore his impact on the industry.