Description: Possibility of increase of sensitiveness of receiver of the optical system of head of self-homing (HSH) of rocket is exposed, on the necessary range of infra-red spectrum of wave-length, due to the increase of number the photo of sensible elements in the receiver of radiation, and diminishing of sensitiveness of receiver on harmful parts of infra-red spectrum of radiation by filters. The necessity of introduction is grounded in the complement of the receiving optical systems specialized mini electronic computer machines for providing high level of automation. The ways of improvement of overall and cost descriptions of receiving device of the optical system, simplifications of construction of HSH, are resulted. Analytical decisions and graphs of dependence of focal distance of the optical system are resulted from necessary working distance of the infra-red HSH rocket and size of sensible area of receiver.
Keywords: head of self-homing of rocket, infra-red radiation, purpose