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  • Programmer’s Library

Photonics Spectra
Jun 2010
PicoQuant GmbHRequest Info
A 4-bit programmer’s library is available for PicoQuant GmbH’s PicoHarp 300 time-correlated single-photon-counting system. Application programming interface-compatible with the corresponding 32-bit library version 2.3 for Windows and Linux, it supports all 64-bit Linux versions with 2.6 kernels, offers throughput improvements for the instrument’s time-tagged time-resolved mode and supports the latest PicoHarp hardware. Fluorescence lifetime images can be recorded at any resolution and size. The PicoHarp is based on a new time digitizer with 4-ps resolution and a processing rate of up to 10 million counts per second. Two input channels operate independently but with a common crystal time base. Synchronization rates from excitation sources can be up to 85 MHz, and onboard histogramming provides up to 65,536 bins, resulting in a time span of 262 ns.


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A device that samples and quantizes a signal in digital form for storage in memory.
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
A quantum of electromagnetic energy of a single mode; i.e., a single wavelength, direction and polarization. As a unit of energy, each photon equals hn, h being Planck's constant and n, the frequency of the propagating electromagnetic wave. The momentum of the photon in the direction of propagation is hn/c, c being the speed of light.
1. In optics, the ability of a lens system to reproduce the points, lines and surfaces in an object as separate entities in the image. 2. The minimum adjustment increment effectively achievable by a positioning mechanism. 3. In image processing, the accuracy with which brightness, spatial parameters and frame rate are divided into discrete levels.
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