Imaging visible

The relationship between the probe current and image visibility can be understood by analyzing the basic requirements that an image will not be obscured by background noise. Background noise in an SEM system is generated by fluctuation of the electron beam current and signal amplification in the detector, and cannot be totally eliminated. 

Olsen, M., Adrian, R. (2000). Out-of-focus effects on particle image visibility and correlation in microscopic particle image velocimetry. Experiments in Fluids, 29, S166-S174. 

On the other hand, the sulphonic acid polymer electrolytes require addition of water to be effective in ECDs. It has been shown [33] that in poly-AMPS equilibrated with 65% or 70% of relative humidity, WO3 films are stable over extended cycling times. However, the required presence of water poses a critical aspect since levels beyond the optimum may cause hydration of the WO 3 film which is accompanied by a slow but persistent formation of a faint image visible in the erased state. 

M. G. Olsen, R. J. Adrian, Out-offocus effects on particle image visibility and correlation in particle image velocimetry. Exp. Fluids, 2000, 29 (7), S166-S174. 

Development Process of making the latent image visible by providing appropriate energy or matter to the imaging material this couples to the latent image differently from the rest of the material. 

Key parameters of microscope images are resolution and visibility. Resolution is the minimum distance between two object features at which they can still be seen as two features. The visibility of a feature is described by its contrast, which is the fractional change in image brightness that it causes. If two features have high contrast but are separated by less than the resolution, they will appear as one feature in the image, visible but not resolved. If their contrast is very low, below about 0.05, they will not be visible at all. Small features in the... 

Fig. 7.11 (a) Photo-aligned hoto-pattemed LCP retarder on substrate S between crossed polarizers, (b) LCP retarder image visible only between crossed polarizers... 

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