A high resolution space-born Earth observation adaptive optic system contains a sensor of wave aberration in its exit pupil. The output signal of this sensor is used to minimise the aberration in such or other feedback loop. The complexity of known wave aberration measurement techniques stimulates the search of alternative methods, one of them being considered in this report.The proposed method of wave aberration measurement is comprised with the following steps: -Taking the measurement of phase characteristic of the optical system based on the current Earth surface image analysis;-Calculation of the unknown wave aberration function using the measured phase characteristic as an input data in Gerchberg and Saxton algorithm. The problems of the further investigation of that measurement technique are discussed.

Optical image movement about an image receiver of a space-born remote sensing system causes degradation of spatial resolving power of the system.The report is dedicated to the problem of minimization of that degradation by means of image movement compensation with an image stabilization subsystem.Unknown parameters of the image movement are expressed through measured or calculated parameters of the satellite movement, and the structure of an electro-mechanic compensator connected to the CCD-matrix of the image receiver is elaborated. Stabilization errors caused by the input data errors, by spatial and temporal discretization, and by the operational errors are classified and analyzed. Based on that analysis, a method of minimization ofthe main component of the total stabilization error is suggested.

No abstract

No abstract

Investigations in the field of optical system quality assessment mostly are dedicated to the concrete methods of measurement and calculation of the system and to concrete qualimetric experiments. These investigations are supplemented with the reviews and the discussions on general problem of substantiation of criteria of quality (figures-ofmerit). Our communication is a contribution to such a discussion.We consider an optical image forming system. If the optical scheme of the system is chosen, then L variable parameters of the scheme p1 pL should be optimized to retrieve the global maximum of some criterion of quality (optimality) ofthe system Q(pl pL). We discuss the methods of solution of three interconnected fundamental problems, namely, the choice of the measure (scale, unit) of quality Q, the choice of the set of the parameters p1,..., p1, and the representation ofthe criterion as the function Q(pl pL).