Patent Number: 
Section: claims

1. An electron microscope comprising:an electron gun for emitting an electron beam;a condenser lens for focusing the beam onto a specimen;first deflection means for deflecting the beam hitting the specimen to vary electron beam position on the specimen;an energy filter for energy-dispersing the electron beam ejected from the specimen in a given direction to form a spectrum;a projector lens for projecting the spectrum formed by the filter onto an image detector;second deflection means for deflecting the beam ejected from the specimen in such a way that the spectrum is projected onto the detector irrespective of the electron beam position on the specimensaid first deflection means has a first deflector disposed between the electron gun and the specimen and a deflection signal supply circuit for supplying a beam deflection signal to a power supply that drives the first deflector;said second deflection means has a second deflector disposed between the specimen and the image detector and a spectral position correcting signal supply circuit for supplying a spectral position correcting signal to a power supply that drives the second deflector;said spectral position correcting signal supply circuit for producing a spectral position correcting signal corresponding to said beam deflection signal; andsaid spectral position correcting signal supply circuit having a scanning direction rotating circuit for rotating said beam deflection signal and a scanning amplitude varying circuit for varying the amplitude of the beam deflection signal rotated by the scanning direction rotating circuit. 2. An electron microscope as set forth in claim 1, wherein said second deflection means deflects the electron beam ejected from the specimen such that said spectrum is projected at a given position on said image detector irrespective of the electron beam position on the specimen. 3. An electron microscope as set forth in claim 1, wherein said second deflector is disposed between the energy filter and the image detector. 4. An electron microscope as set forth in claim 3, further including:multiple stages of electron lenses disposed between said specimen and the energy filter; andan excitation signal supply circuit for supplying an excitation signal to a power supply that drives the electron lenses,wherein said spectral position correcting signal supply circuit produces a spectral position correcting signal corresponding to said beam deflection signal and said excitation signal. 5. An electron microscope as set forth in claim 1, wherein said second deflector is disposed between the projector lens and the image detector, and wherein said spectral position correcting signal supply circuit produces a spectral position correcting signal corresponding to the excitation signal supplied to a power supply that drives said projector lens. 6. An electron microscope as set forth in claim 4, wherein said second deflector is disposed between the projector lens and the image detector, and wherein said spectral position correcting signal supply circuit produces a spectral position correcting signal corresponding to the excitation signal supplied to a power supply that drives said projector lens. 7. An electron microscope as set forth in claim 1, wherein said second deflector is disposed between the specimen and the energy filter. 8. An electron microscope as set forth in claim 1, further including means for creating an EELS profile based on a spectral image taken in by said image detector.