Heterocentric

The purpose of this paper is to develop a complete and general theory of aperture referral in linear optics for dioptric systems that may be heterocentric and astigmatic. Apertures may be elliptical and decentred. Referral transforms the geometry of an aperture.

The satisfaction one desires from the action is due either to the value which the action has directly for the doer or to the value which it has in producing satisfaction in others. The active attitude, then, is either egocentric or heterocentric.