Showing papers on "Image conversion published in 1970"

Image Upconversion: Part III

Abstract: We discuss in detail the imaging properties of nonlinear image upconverters. Three‐dimensional image conversion is shown to be possible. The dependence on the system parameters of the converted image's resolution, location, and chromatic aberration is treated. Image conversion with object and pump beams of the same frequency is experimentally demonstrated and the experimental techniques discussed.

Millimeter wave image conversion using a semiconductor image convertor

Abstract: Image conversion at millimeter wave frequencies has been demonstrated using reflection coefficient modulation of a bulk germanium panel.

Apparatus and method for image conversion of infrared radiation

Abstract: A radiation detector produces a control signal in accordance with radiation impinging thereon. An optically effective modulator comprising a chopper directs radiation from a specimen section to the surface of the radiation detector in a manner whereby the surface is marked with various image points in a predetermined geometrical arrangement at various carrier frequencies. The radiation detector produces a signal which is the sum of all the image intensity pulses impressed upon the various carrier frequencies. A separator coupled to the radiation detector separates the image point pulses in accordance with their carrier frequencies. Storers coupled to the separator individually store the separated image point pulses. A scanner coupled to the storers scans the stored image point pulses in accordance with the sequence of the marked image point in order to provide a suitable control signal.