摘要:
X-ray image intensifier tube comprises a silicon diode array imaging target which, on the electron bombarded side, is provided with a deeply diffused phosphorus n.sup.+ layer covered with a metallic buffer layer.
摘要:
The invention includes a channel-type electron multiplier incorporating a glass plate having holes therethrough. The plate is treated so that the holes will support secondary emission. When primary electrons from a photocathode enter the holes, an increased current density is produced at the output of the holes. When the output is directed onto a phosphor screen, an intensified image of the scene being viewed is produced. Night scenes may thus be brightened for use in military reconnaissance or the like. However, channel-type electron multipliers have what is known as a saturation level of operation beyond which an increase in input current produces little or no increase in output current. The device of the present invention alleviates this problem by increasing electrical resistance near the output. This construction makes it possible to produce a special electric field distribution in the holes. This field distribution then causes the gain of the multiplier to saturate at substantially higher input current levels. In addition, a multiplier of this type will exhibit a nonlinear input versus output relationship such that, if incorporated in an image tube (direct view or TV pickup), it imparts to this tube highly desirable contrast enhancing characteristics. The invention also includes a method of making the special type of electron multiplier having the hole surface resistivity variation.
摘要:
A multispectral camera device according to the present invention consists of a high resolution lens, sensing means capable of converting photon energy into electrical energy and wedge interference filter means disposed between the lens means and the sensing means. The sensing means being disposed to read the image transmitted by the wedge interference filter means.
摘要:
An intensified television camera tube including a channel multiplier array incorporated adjacent the target electrode to multiply the electrons being emitted from the source, the channel multiplier array being utilized as a mechanical support for the target electrode and as the output screen or readout mesh. Also, a system for eliminating spurious signals from the output video signal which includes a capacitance network connected in circuit with the input and output sections of the multiplier array.
摘要:
An image orthicon type device is disclosed for electrooptical integration and correlation systems. A photoemissive cathode and a dynode electrode of an electron conductive dielectric material provide for direct emission of secondary electrons from collimated light input signals to impinge on an insulated target member. The normal photoelectric emission current is multiplied by a factor inherent in direct secondary electron emission by the dynode electrode and becomes a linear function of the accelerating potential between the photocathode and dynode for processing time variable modulating signals. An axial focusing magnetic field is utilized. The dynode electrode arrangement may be constructed as a separate sealed compartment in the overall device.