摘要:
A two-dimensional image sensor such as a stimulable phosphor sheet is exposed under vacuum to an electron beam that has passed through a specimen to cause the two-dimensional image sensor to store the energy of the electron beam, then stimulating energy is applied to the two-dimensional image sensor for discharging light therefrom which represents the stored energy of the electron beam, and the light discharged from the two-dimensional image sensor is photoelectrically detected to produce an image signal. A reference image signal is also produced in a similar manner by exposing the two-dimensional image sensor to an electron beam that has not passed through the specimen. One of the first-mentioned image signal and the reference image signal is subtracted from the other per pixel to generate a difference signal, from which an electron microscope image of the specimen is reproduced.
摘要:
A two-dimensional image sensor is exposed under vacuum to an electron beam having passed through a specimen, and instantaneous light emitted from the image sensor upon exposure to the electron beam is detected with an image intensifier to reproduce an image observed to attain a desired focused condition and/or a desired field. After the image has been focused by the operator while observing the image, the image sensor is exposed under vacuum to an electron beam having been transmitted through the specimen to store the energy of the electron beam representative of the image of the specimen on the image sensor. Then, stimulating energy is applied to the image sensor for discharging light therefrom which represents the stored energy of the electron beam. The light discharged from the image sensor is photoelectrically detected to reproduce the transmitted electron-beam image of the specimen as a final output image thereof under the desired focused condition and/or with said desired field.
摘要:
A stimulable phosphor sheet is exposed to an electron beam having passed through a specimen in an electron microscope to record a first magnified image of the specimen on the sheet. A stimulating energy is applied to the sheet for discharging light therefrom which represents the first magnified image. The light discharged from the image sensor is photoelectrically detected to reproduce the first magnified image which can be observed to attain a desired focused condition and/or a desired field on the electron microscope. Then, the same or another stimulable phosphor sheet is exposed to the electron beam to record a second magnified image of the specimen on the sheet, and the second magnified image is reproduced as a final image under the desired focused condition and/or with the desired field.
摘要:
A two-dimensional image sensor is exposed under vacuum to an electron beam having passed through a specimen in an electron microscope to enable the image sensor to store the energy of the electron beam. Then, stimulating energy is applied to the image sensor to discharge the stored energy as light. The light discharged from the image sensor is photoelectrically detected to produce an image signal. A defocus value of the image is detected on the basis of the image signal. The image signal is also subject electrically to the Fourier transform to produce a converted image signal indicative of a ring pattern. The degree of one ring, the length of minor and major axes of the ring, and the angle of inclination of the major axis are computed from the converted image signal for computing currents to be fed to a stigmeter of the electron microscope to eliminate astigmatism.
摘要:
An electron microscope has a two-dimensional sensor located at the image-formation plane. The two-dimensional sensor stores electron beam energy and emits light upon exposure to light or heat. The filament is located at a position displaced from the principal optical axis of the electron beam so that the image of the filament may not be recorded on the two-dimensional sensor. The two-dimensional sensor is, for example, made of stimulable phosphor.
摘要:
A method for recording and reproducing an electron beam image information comprising:recording an electron beam image transmitted through reflected from the sample as an electron beam energy latent image on a stimulable phosphor sheet comprising a stimulable phosphor layer having a thickness in the range of 10 to 150 .mu.m or an exposed stimulable phosphor layer with no protective layer;irradiating said stimulable phosphor sheet with an electromagnetic wave to release at least a portion of electron beam energy stored in said stimulable phosphor sheet as stimulated emission;detecting the stimulated emission; andphotoelectrically processing the detected stimulated emission to obtain an electron beam image information of the sample.
摘要:
A method for recording and reproducing an electron beam image information comprising:recording an electron beam image transmitted through a sample or reflected from the sample as an electron beam energy latent image on a stimulable phosphor sheet comprising, according to the present invention, a stimulable phosphor layer having a thickness in the range of 10 to 150 .mu.m and/or an exposed stimulable phosphor layer with no protective layer, or a protective layer, the thickness of which is preferably less than the thickness of a stimulable phosphor layer of a generally employed stimulable phosphor sheet;irradiating said stimulable phosphor sheet with an electromagnetic wave to release at least a portion of the electron beam energy stored in said stimulable phosphor sheet as stimulated emission;detecting the stimulated emission;andphotoelectrically processing the detected stimulated emission to obtain an electron beam image information of the sample.
摘要:
An apparatus for recording and reproducing an image of a specimen produced by an electron microscope includes a two-dimensional image sensor for storing the energy of an electron beam having passed through the specimen, a stimulating system for scanning the two-dimensional image sensor with stimulating energy to discharge the stored electron beam energy as light from the two-dimensional image sensor, a photoelectric transducer for photoelectrically detecting the light discharged from the two-dimensional image sensor, and an erasing system for applying erasing energy to the two-dimensional image sensor to discharge energy remaining thereon after the light has been photoelectrically detected.
摘要:
An apparatus for recording and reproducing an image of a specimen produced by an electron microscope includes a two-dimensional image sensor for storing the energy of an electron beam having passed through the specimen, a stimulating system for scanning the two-dimensional image sensor with stimulating energy to discharge the stored electron beam energy as light from the two-dimensional image sensor, a photoelectric transducer for photoelectrically detecting the light discharged from the two-dimensional image sensor, and an erasing system for applying erasing energy to the two-dimensional image sensor to discharge energy remaining thereon after the light has been photoelectrically detected. The apparatus further includes an optical filter for cutting off light which has a wavelength in the wavelength region of the stimulating energy. The stimulating system includes a deflecting element for deflecting the stimulating energy towards the two-dimensional sensor.
摘要:
A radiation image recording and read-out apparatus comprises a case housing a stimulable phosphor sheet and having an opening, a light shielding cover housed in the case for projection therefrom through the opening, a recording section for exposing the stimulable phosphor sheet disposed at an exposure position in the light shielding cover projected out of the case to radiation, and a read-out section having a sub-scanning system for moving the stimulable phosphor sheet between the exposure position and a position in the case. Or, the apparatus comprises a case having an opening for passing the stimulable phosphor sheet therethrough, a recording section for exposing the stimulable phosphor sheet disposed at the exposure position in the case to radiation, and a read-out section having a sub-scanning system for moving the stimulable phosphor sheet between the exposure position and a position projected out of the case. Alternatively, the apparatus comprises a sheet feed system for reciprocating a strip-like flexible stimulable phosphor sheet between first and second wind-up shafts, and a recording section for exposing the stimulable phosphor sheet disposed between the first and second wind-up shafts to radiation.