Image Processing Reference
In-Depth Information
10.4 A square sheet 2 m on a side situated in the x - y plane and centered on the
origin has a charge of 1 nC uniformly distributed over its surface.
(a) Find the electric potential V at a distance of 1 m perpendicular from center
of the square.
(b) Find the electric
eld E at the same point.
10.5 For a two-component conductive magnetic-brush development system, assume
that the toner charge per unit area completely neutralizes the photoconductor
charge per unit area. Show that with this assumption,
the DMA can be
predicted by the following expression:
M
A ¼
V dev e 0
( Q = M )( d p = K p )
D ¼
where
d p is the thickness of the photoconductor
K p is the dielectric constant
V dev is the development voltage
e 0 is the dielectric permittivity of air
Q = M is the toner tribo (charge to mass ratio)
10.6 For a four-color printing system, using the techniques described in Section
10.7, obtain the printer gamut for
five different paper types. Use measured
paper re
ectance spectra for each type.
REFERENCES
1. D.A. Hays and K.R. Ossman, Electrophotographic copying and printing (xerography), in
The Optics Encyclopedia, Berlin, Germany: Wiley-VCH, 2003, pp. 587 - 607.
2. R. Lux and H.-J. Yuh, Is image-on-image color printing a privileged printing architecture
for production digital printing applications? NIP20: Proceeding of the IS&T ' s Inter-
national Conference on Digital Printing Technologies, pp. 323 - 327, Salt Lake City,
UT, Oct. 31
Nov. 5, 2004.
3. D.M. Pai and B.E. Springett, Physics of electrophotography, Reviews of Modern Physics,
65(1), January 1993.
4. R.M Schaffert, Electrophotography, London and New York: The Focal Press, 1975.
5. J.A. Giacometti, S. Fedosov, and M.M. Costa, Corona charging charging of polymers:
Recent advances on constant current charging, Brazilian Journal of Physics, 29(2), Jun.
1999.
6. J.Q. Feng, P.W. Morehouse, and J.S. Facci, Steady-state corona charging behavior of a
corotron over a moving dielectric substrate, IEEE Transactions on Industry Applications,
37(6), November = December 2001.
7. S. Maitra, P. Ramesh, and S. Jeyadev, Impact of photoreceptor design on digital electro-
photography, in Color Imaging: Device-Independent Color, Color Hard Copy, and
Graphic Arts, San Jose, CA, Jan. 29 - Feb. 1, 1996; S. Maitra, P. Ramesh, and S. Jayadev,
Impact of photoreceptor design on digital electrophotography, Proceedings of the SPIE,
2658, 112 - 122, 1996.
8. A.C. Tam and R.D. Balanson, Lasers in electrophotography, IBM Journal of Research
Development, 26(2), Mar. 1982.
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