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Патент USA US2121990

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2
2,121,990
point to point. This distribution may for in
terposed between said light source and one face
stance be transformed into a black and white
of said screen to ?ood the area thereof, means
for directing the beam of electronic energy on
the opposite face of said screen to control the
' projection picture by means of the known method
of Toepler. The mica plate may however be also
inserted in a polarization optics between two
projecting the luminous image formed by the
inhomogeneities by an- increased brilliancy of the
light source and the beam of electrons on said
screen upon a viewing screen.
?eld of view at the respective places thus mak
ing the receiving picture visible.
10
light of the screen, and an optical system for
crossed nicols indicating the produced optical
Having now described the invention, what is
claimed is:
1. In a television receiver, the combination of
a cathode ray structure containing a ?uores
cent screen, a constant intensity light source ar
15 ranged to irradiate one face of said screen, a
3.- In‘ a television receiver ‘for reproducing
electro-optical images, the combination of a cath
ode ray tube equipped with a ?uorescent screen
tensity light source, a lightu?lter and optical
system interposed between said light source and 15
light ?lter and optical system interposed between
one face of said screen to ?ood the area thereof,
said light source and screen, means for direct
ing a beam of electrons upon the opposite face of >
said screen to control the light of the screen.
means for directing the beam of electronic en;
20 and an optical system to project the image
formed by the light source and the beam of elec¢
trons on said screen upon a viewing screen.
2. In a television receiver for reproducing elec
tro-optical images, the combination of a cathode
ray tube equipped with a ?uorescent screen and
means for moving a beam of electronic energy in
a predetermined manner, a constant intensity
light ‘source, a light ?lter and optical system in
10
and means for moving a. beam of electronic en
ergy in a predetermined manner, a constant in
ergy on the opposite face of said screen to con
trol the light of the screen, a source of electric
signaling impulses, means for varying the in 20
tensity of said electron beam in accordance with
the intensity of said electric impulses, and an
optical system for projecting the luminous image
formed by the light source and the beam of elec
trons on said screen upon a viewing screen.
Farr; scnRo'rnR.
ARTHUR some.
25
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