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IPD Camera System0 pages
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IPD Position Sensing Photomultipliers | ||||||
Photograph shows the IPD425 Applications Time resolved fluorescence imaging Օ Time resolved spectroscopy Tracking and position sensing Օ Speckle interferometry UV flame detection Օ Replacement for ITT F4146 | ||||||
Features Simple photon counting Օ High resolution 62 micron FWHM Fast response - less than 5 ns Օ Resistive film anode High gain - 5x107 Օ Compact end - on geometry Broad spectral response - UV to IR | ||||||
Introduction The IPD (Imaging Photon Detector) is a two dimensional imaging sensor capable of detecting extremely weak radiation and when used in conjunction with Photek's IPD processing electronics, is capable of presenting the information in digital form immediately for computer processing and in analogue form for a real time display on an oscilloscope. It can also be used to time - tag individual events, enabling quantitative measurements to be made in both space and time. | ||||||
The IPD system is able to generate a TV quality picture with an input light level of a few photons per second, approximately one million times more sensitive than the average night surveillance (LLTV) camera. The 25 mm format is most commonly used for microscopy, whereas the larger format detectors (40 mm and above) are commonly used for X-ray crystallography and auto radiography. General Description The IPD is a position-sensing high gain photomultiplier tube using a cascaded stack of four microchannel plates as the imaging electron multiplier. Single photoelectron event charge pulses generated by the MCP stack are collected by a special two dimensional resistive anode, which splits the charge pulse proportionally among four output corner electrodes. Electronic processing of the four simultaneous output charge pulses determines the x-y address and time of occurrence of each detected input photon event. The IPD incorporates a flat, 'end-on' input window and photocathode and is available is 25 or 40 mm active diameter versions. The proximity focused gap between the photocathode and the MCP can be electronically gated for device protection and for time - sensitive detection. |