A NEW PATTERN FOR NUTATING RETICLES TO SIMPLIFY SEEKER ELECTRONICS

Document Type : Original Article

Authors

1 MSc. Student, Dep. Of Physics, Applied Science Complex, Malek-e-Ashtar University of Technology, Shahinshahr, Iran.

2 Assistant Professor, Physics Dep., Applied Science Complex, Malek-e-Ashtar University of Technology, Shahinshahr, Iran.

3 Ph.D student, Dep. of Electrical Engineering, K. N. Toosi University of Technology, Tehran, Iran.

Abstract

Reticle systems have widely been used in IR seekers because of their simple structure and low cost; and they often employ stationary reticles with conical scan optics, for their extensive field of view (FOV) and high accuracy. The typical reticle pattern in these systems is the Wagon-Wheel reticle. This paper presents a new reticle pattern instead of Wagon-Wheel pattern in order to simplify the seeker electronics, while keeping the extended field of view. The proposed pattern requires AM demodulation instead of current FM demodulation. We have simulated target detection system by using the proposed reticle pattern. The results have confirmed our claim. The static gain curves have been obtained for different target sizes and positions for the proposed reticle and have been compared with that’s of Wagon-Wheel reticle.

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