Large Depth Of Focus Of The New Optical Imaging Technology

It has been an active research topic for many years to extend the depth of focus of large relative apeiture optical systems, such as: optical remote sensoi-, microscope; etc. The traditional method of achieving an extended depth of focus is by stopping do~ the apelture, but, the method has suffered two significant deficiencies; A decrease of optical power at the image plane, and a decrease of image resolution. For optical remote sensor, the variety of space environment will result in the deviation of the image plane. Some methods were adopted to control the image defocus, but these methods also increase the weight~ volume and cost of the remote sensor. In this paper, we describe a novel technology for extending the depth of focus of incoherent optical systems that does not suffer from the significant deficiencies of earlier method. This technology uses generalized aspheric optics to encode images to be invariant to defocus ,and digital signal processing to decode the images. This technology not only can ensure the optical system?s optic gather ability and resolution not change but also can extend the depth of focus of the optical system. In this paper, we priniaiy demonstmte the principle of the technology, and constitute the emulational model on the base of the technology. Via the emulational experiment, the experiment result validate the principle of the technology.