The former technology uses a photocathode to convert light ( in the visible or near infrared portions of the electromagnetic spectrum ) to electrons, amplify the signal and transform it back to photons.
42.
A variation is the double reflection type, where the metal base is mirror-like, causing light that passed through the photocathode without causing emission to be bounced back for a second try.
43.
Here the feedback is usually an undesirable phenomenon, where the light generated by the phosphor screen " feeds back " to the photocathode, causing the tube to oscillate, and ruining the image.
44.
An image intensifier inherently includes a shutter functionality : If the control voltage between the photocathode and the MCP is reversed, the emitted photoelectrons are not accelerated towards the MCP but return to the photocathode.
45.
An image intensifier inherently includes a shutter functionality : If the control voltage between the photocathode and the MCP is reversed, the emitted photoelectrons are not accelerated towards the MCP but return to the photocathode.
46.
He is working on the development of components for a photoanode, photocathode, and ion-conducting membrane for a system for artificial photosynthesis that would use sunlight and water to produce hydrogen and oxygen.
47.
In 1933 refines iconoscope made by Kataev . Patents the transfer of " electronic image " with conductive photocathode on dielectric ( copyright certificate dated September 30, 1933 with priority from February 20, 1932 ).
48.
Of note, the S1 photocathode had sensitivity peaks in both the infrared and ultraviolet spectrum and with sensitivity over 950 nm was the only photocathode material that could be used to view infrared light above 950 nm.
49.
Of note, the S1 photocathode had sensitivity peaks in both the infrared and ultraviolet spectrum and with sensitivity over 950 nm was the only photocathode material that could be used to view infrared light above 950 nm.
50.
The side-on design is used, for instance, in the type 931, the first mass-produced PMT . Besides the different photocathode materials, performance is also affected by the transmission of the window material that the light passes through, and by the arrangement of the dynodes.
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