Abstract

This paper shows that, when an optical homing head (OHH) approaches a target, so that the radiation power that it receives and the angular size of the target's image greatly increase, it is necessary in the output signal of a rotating photodetector device (PDD) to encode appropriately the angular error of the OHH and a parameter that characterizes the radiation power received by the OHH, in order to ensure stable operation of the OHH with the adaptive automatic-gain-adjustment system traditionally used in such cases. Encoding in this case means that the variation of the radiation transmission in the PDD channel and accordingly of its output-signal parameters are organized as a function of the angular error either by choosing the PDD's topology or by varying the transmission of a mask at its input. It is shown that these codes can be varied during the approach, and that the signal-processing algorithms must vary in accordance with them.

© 2009 Optical Society of America

Evaluation of Optical Wireless Technologies in Home Networking: An Analytical Hierarchy Process Approach

G. Dede, T. Kamalakis, and D. Varoutas
J. Opt. Commun. Netw. 3(11) 850-859 (2011)

Compact optical head using a holographic optical element for CD players

Yasuo Kimura, Seizin Sugama, and Yuzo Ono
Appl. Opt. 27(4) 668-671 (1988)

Head-mounted adaptive optics visual simulator

Shoaib R. Soomro, Santiago Sager, Alba M. Paniagua-Diaz, Pedro M. Prieto, and Pablo Artal
Biomed. Opt. Express 15(2) 608-623 (2024)

Reducing the residual focus error signal in optical pickup head astigmatism displacement systems using the signal conditioning method

Quangsang Vo, Fengzhou Fang, Xiaodong Zhang, and Linlin Zhu
Appl. Opt. 57(34) 9972-9980 (2018)

Coherent range-gated laser displacement metrology with compact optical head

O. P. Lay, S. Dubovitsky, D. A. Shaddock, and B. Ware
Opt. Lett. 32(20) 2933-2935 (2007)