THE "NEW LOOK"IN
ELECTRON
MICROSCOPES
Objective
aperture
shown several fîmes actual
Objective-Aperture Contamination Gone... Image Contrast Increased The reason? . . . controlled heat, applied to the objective aperture so t h a t contaminants refuse to gather on the aperture—at all beam intensities. With such contamination eliminated, the diameter of the hole can be reduced to realize an increase in image contrast. In addition, the aperture can be moved in or out of a fully-saturated beam, repeatedly, without contamination. The permanent objective aperture is standard equipment on the RCA Type EMU-4 Microscope and is but one Nationwide service available through RCA Service Company. Offices in major cities.
of the many innovations that are " s t a n d a r d " for the new look in electron microscopes: transistorized, modularized electronics; an exclusive selected-area diffraction facility; provision for i n s t r u m e n t revision and expansion; highcapacity, m i n i m u m - b a c k s t r e a m i n g diffusion p u m p and many others. For more i n f o r m a t i o n , w r i t e RCA Scientific Instruments, B u i l d i n g 15-5, Camden, N. J . 0 8 1 0 2 . In Canada: RCA Victor Co. Ltd., Montreal.
The Most Trusted Name in Electronics Circle No. 165 on Readers' Service Card
Circle No. 141 on Readers' Service Card See ACS Laboratory Guide for All Products/Sales Office
size.
