photo film
photo film
A film that records a TEM image or a diffraction pattern. The "photo film" is directly exposed to electrons in the camera chamber of a TEM. The sensitivity characteristic of the photo film to the electron is similar to that to visual light. Since the photo film has a small dynamic range of 2 digits and insufficient linearity, it is not suitable for quantitative measurement. However, since its positional resolution is as high as about 3 μm, the photo film has been used for the photography of high-definition images. Its gray level is <16 bits. Now, the imaging plate and CCD are available as recording devices that have higher sensitivity than the photo film.
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