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・ Excised slitshell
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・ Excisionase
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Excitation filter
・ Excitation function
・ Excitation table
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Excitation filter : ウィキペディア英語版
Excitation filter
An excitation filter is a high quality optical-glass filter commonly used in fluorescence microscopy and spectroscopic applications for selection of the excitation wavelength of light from a light source. Most excitation filters select light of relatively short wavelengths from an excitation light source, as only those wavelengths would carry enough energy to cause the object the microscope is examining to fluoresce sufficiently.〔Light with shorter wavelengths have higher energy, according to the Planck equation E = hc/ \lambda〕 The excitation filters used may come in two main types — short pass filters and band pass filters. Variations of these filters exist in the form of notch filters or deep blocking filters (commonly employed as emission filters). Other forms of excitation filters include the use of monochromators, wedge prisms coupled with a narrow slit (for selection of the excitation light) and the use of holographic diffraction gratings, etc. (beam diffraction of white laser light into the required excitation wavelength (selected for by a narrow slit) ).
An excitation filter is commonly packaged with a emission filter and a dichroic beam splitter in a cube so that the group is inserted together into the microscope. The dichroic beam splitter controls which wavelengths of light go to their respective filter.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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