GB1443478A - Specimen heating device for electron microscopes - Google Patents

Abstract

1443478 Electron microscopes NIHON DENSHI KK 12 Dec 1973 [14 Dec 1972] 57646/73 Heading H1D A specimen holder on a specimens support, for insertion into an electron microscope in a direction perpendicular to the electron-optical axis, and provided with means for heating the specimen, is arranged so that thermal expansion produces oppositely directed movements of the holder and the support, whereby drift of the specimen from the optical axis may be prevented. The holder 9 is mounted on the support 8, and is tiltable with respect to the electron optical axis by rotation of support 8 by knob 3; is displaceable along the Y-axis by adjustment of the screw 6; and is displaceable along the X-axis by adjustment of the screw 15, which axially displaces the rod 11 which is connected to the support 8 by a thermally insulating ball 10 of ruby. The specimen holder 9 is supported within an aperture 16, Fig. 2, in the support 8 by thermally insulating ruby balls 17a, 17b, 17c and 17d, the first two of which engage in corresponding cone-shaped depressions 18a and 18b in the sides of the holder, while balls 17c and 17d engage in V-shaped grooves 19a and 19b in the sides of the holder. A rise of temperature causes the specimen support to move the specimen cartridge 23 to the right with respect to the point 10 defined by the end of the rod 11, while the specimen holder 9 moves the cartridge to the left from the anchored balls 17a and 17b, whereby the suitable choice of the dimensions l 1 and l 2 , Fig. 2, and of materials, movement of the cartridge may be substantially prevented. The specimen catridge 23 is mounted in the specimen holder 8 by the ruby balls 24a, 24b and 24c, and incorporates a heating coil 22, Fig. 3. T6 specimen support 18 may also include a heater (25, Fig. 5, not shown) to permit preheating of the support, with consequent reduction in the time required to reach thermal equilibrium.