Design and analysis of optical system of semi-active laser seeker

Abstract

The laser seeker is an important part of navigation guided weapons. The working principle of the laser seeker was expounded, and the optical system of the seeker was designed according to the system index requirements. Its optical system is mainly composed of a receiving optical lens combination and a four-quadrant detector. According to the system performance and technical indicators such as the detection distance of the seeker, the receiving clear aperture, and distortion, the laser imaging spot diameter and the center position range were simulated. The optical system model was established by using CODE-V software. And the spot quality was optimized and evaluated through distortion, trace map, and radial envelope energy curve. Finally, an optical system that satisfies the requirements is designed, and the spot imaging quality is great, and the angular tracking accuracy reaches 0.10° / s.

Laser seeker design with multi-focal diffractive lens

“…For simplicity, background power (P B ), which is reflectance from the sun, was not added to the SNR equation. While 1064 nm is a commonly preferred wavelength for many laser seekers [1][2][3][4][5][6][7], the design wavelength of 1540 nm has been specifically chosen. The selection of this wavelength is based on considerations outlined in equation (9).…”

“…In the laser seeker or 4-quadrant measurement methods, the azimuth and elevation angles are measured according to the detector plane [2,3]. The angular position can be determined after measuring the voltage levels in each quadrant.…”

“…The target's position is determined by analyzing the laser beam reflected from the target onto the 4-quadrant detector. This method enables the measurement of the azimuth and elevation angles of the target [1][2][3][4][5][6][7].…”

“…DOEs offer even more advantages due to their ability to decrease weight, volume, and enhance the flexibility of optical system designs in military and aerial applications. Given the requirements of aerial applications like Unmanned Aerial Vehicles (UAVs) and cruise missiles, reducing volume and weight is highly beneficial [9,10,[15][16][17][18][19][20][21][22][23][24].…”

Lazer Arayıcılar için Test Sistemi Tasarımı ve Modellemesi

“…The laser seeker detects the laser reflected from the target in the missile, and the necessary tracking commands are generated. For this reason, seekers also serve as the brains of missiles [2].…”