摘要:
A corpuscular-beam microscope including a support stand, a columnar housing containing the optical elements of the microscope, electronic control and regulating means for generating and transmitting voltage signals to parts of a beam generator of the microscope which are at high-voltage potential, and at least one high-vacuum pump for evacuating the microscope housing. The improvement of the invention comprises the support stand comprising a horizontal base member and a flexure-resistant vertical support member disposed on the base member. The microscope housing, the control and regulating means, and the pump are mounted on different sides of the support member and are arranged so that the center of gravity of the support stand is disposed between the support member and the optical axis of the microscope near the axis.
摘要:
A scanning transmission electron microscope including an evacuated housing and a phase contrast device in which the imaging ray cone of the microscope generates a hologram having zones of positive or negative interference. The microscope includes means for separately detecting and measuring the intensities of the zones of positive or negative interference and a picture display means coupled to and controlled by the detecting means for monitoring the intensities detected and measured.The improvement of the invention comprises an improved detecting means including an image converter disposed in the electron beam path of the microscope on which the hologram is projected for converting the hologram into an optical image. Planar image masks are disposed outside of the microscope housing and have transparent and opaque areas which correspond to the zones of positive and negative interference of the hologram. An image transmission means, disposed adjacent the image converter, transmits the optical image with unchanged relative intensity distribution to the masks, and means, disposed adjacent the masks and coupled to the display means, measures the intensity of light transmitted through the transparent areas of the mask and generates an output signal corresponding to the intensities measured and detected for display on the display means.A method for correcting astigmatism and/or defocusing in such a microscope is also disclosed.
摘要:
A corpuscular-beam transmission-type microscope in which image elements are generated simultaneously. The microscope includes a specimen holding stage movable perpendicular to the microscope axis in a pair of transverse adjustment directions, beam deflectors disposed behind the specimen along the beam path for deflecting an image in the microscope in at least one deflection direction, and magnetic lens imaging means disposed between the specimen and the beam deflectors which helically deflects, between the specimen and the beam deflectors, parts of the beam not disposed in the microscope axis and rotates the image of the specimen through an image rotation angle in the microscope. The improvement of the invention comprises the beam deflectors deflecting the beam in a pair of transverse deflection directions disposed in a plane parallel to the pair of transverse adjustment directions and rotated with respect to the pair of transverse adjustment directions through an angle coinciding with the image rotation angle.
摘要:
A process for compensating for an incorrect operation of measuring devices fitted with a programming section caused by external influences. The measuring devices and a sensor responding to the influence are fitted in a chamber exposed to the influencing factor. When the influencing factor changes, measurements from the measuring device and the sensor are detected by a data processing system which provides the programming section of the measuring devices with signals compensating for the incorrect operation caused by the influencing factor. To perform such a process rapidly and thus economically, the influencing factor is continuously changed and the current output value of the sensor and the current measurement provided by the measuring device are detected with a timing predetermined by the data processing system.
摘要:
A pressure transducer with a disk-shaped pressure sensor component is connected to a pressure supplying body. The pressure sensor component is surrounded on the outside by a cap-like part whose bottom is above the side of the pressure sensor component that faces away from the pressure supplying body. The pressure supplying body is also connected to a pressure transmitting part over a separating membrane. In order to be able to produce such a pressure transducer at a comparatively low cost, the pressure sensor component is a standard pressure sensor with a conventional base like those used to manufacture semiconductor components. The base of the pressure sensor is in contact with the bottom of the cap-like part through an intermediate filling of cast resin. The bottom of the cap-like part has individual openings for connecting wires and the connecting tube on the low pressure side. The cap-like part is welded to the pressure transmitting part.
摘要:
An improved transmission-type, scanning charged-particle beam microscope including a television camera tube and a television display tube for generating and displaying a diffraction image of a specimen to be examined. The improvement of the invention comprises the provision of a transparent fluorescent screen disposed in the ray cone of the beam behind the specimen along the beam path in the microscope, light-optical means adapted for imaging the fluorescent screen on a target of the television camera tube, and detector means for integrally detecting radiation emanating from the fluorescent screen.
摘要:
A scanning, corpuscular-beam microscope which includes a beam deflection system comprising a first stage for deflecting the beam out of the optical axis of the microscope and a second stage, disposed after the first stage along the beam path, for deflecting the beam towards the optical axis of the microscope. A first objective lens having a short focal length is disposed after the second beam deflection stage along the beam path for focusing the beam on a specimen. The improvement of the invention comprises the provision of a second objective lens having a long focal length which is disposed above the first objective lens along the beam path. The second objective lens is excited for low magnification of the specimen by the microscope and redirects the deflected beam in a direction approximately parallel to the microscope axis and focuses the beam on the specimen. The first objective lens and the second stage of the deflection system are inoperative during the redirection of the beam by the second objective lens.
摘要:
A scanning corpuscular-beam transmission-type microscope including an energy analyzer below the specimen and a first deflection system disposed between the beam source and the specimen. A second deflection system is disposed between the specimen and the energy analyzer for redirecting the beam to the input aperture of the energy analyzer and is rotated with respect to the first deflection system to compensate for rotation of the specimen image by the objective lens of the microscope.