Color television camera indexing apparatus

Claim 2

A color television camera for generating an electrical signal corresponding to an object in the field of view of said camera, said camera comprising a scanning surface adapted to convert light projected thereon into an electrical output, filter means disposed between said object and said scanning surface and adapted to form on said scanning surface a color separated image in accordance with the color components of said object, and circuit means for forming electrically on said scanning surface an index image having a phase that changes alternately in successive periods of said output so that said electrical output is a Composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image and having its phase similarly changed in said successive periods.

Claim 3

A color television camera in accordance with claim 1 wherein indexing electrodes are positioned in close proximity to said scanning surface and said circuit means are connected to said electrodes.

Claim 4

A color television camera in accordance with claim 2 wherein said composite signal containing said indexing signal and color video signal is obtained from said indexing electrodes.

Claim 5

A color television camera in accordance with claim 2 wherein scanning means are provided for scanning said scanning surface.

Claim 6

A color television camera in accordance with claim 4 wherein said circuit means comprises a signal generator for generating an alternating signal correlated to said scanning means and which is applied to said electrodes.

Claim 7

A color television camera in accordance with claim 5 wherein second circuit means are provided for deriving from said composite signal an indexing signal and a video signal.

Claim 8

A color television camera comprising a scanning surface adapted to convert light projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming a color separated image of said object on said surface, first circuit means for electrically forming on said surface an index image having a phase that changes alternately in successive periods of said output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, and second circuit means for deriving from said composite signal an index signal and a video signal and which comprises a delay circuit for delaying said composite signal, and an adder to add said composite signal to the output of said delay circuit to obtain at the output of said adder said video signal.

Claim 9

A color television camera comprising a scanning surface adapted to convert light projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming a color separated image of said object on said surface, first circuit means for electrically forming on said surface an index image having a phase that changes alternately in successive periods of said output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, and second circuit means for deriving from said composite signal an index signal and a video signal and which comprises a delay circuit for delaying said composite signal, and an adder to add said composite signal to the output of said delay circuit to obtain at the output of said adder said video signal.

Claim 10

A color television camera in accordance with claim 7 wherein said second circuit means further comprises a subtraction circuit to obtain a difference signal between said composite signal and the output from said delay circuit to obtain at the output of said subtraction circuit said index signal.

Claim 11

A color television camera in accordance with claim 8 wherein inversion means are provided for reversing the polarity of said index signal and switch means are disposed after said inversion means for alternately passing said subtraction signal and said polarity reversed index signal.

Claim 12

A color television camera in accordance with claim 9 wherein said output of said switch means and said video signal are applied to demodulator means to obtain at the output thereof signals corresponding to the color components of said object.

Claim 13

A color video signal generating apparatus comprising image pickup means having a scanning surface adapted to convert images projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming on said scanning surface a color separated image in accordance with the color components of said object, index electrodes disposed in close proximity to said scanning surface, first circuit means connected with said index electrodes for electrically forming on said scanning surface an index image having a phase that changes alternately in successive periods of said electrical output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, a signal electrode in close proximity to said scanning surface for extracting said composite signal from the latter, and second circuit means connected with said signal electrode for separately obtaining said index signal and said color video signal from said composite signal and which comprises a delay circuit for delaYing said composite signal by one of said periods of said electrical output, and an adder circuit to add said composite signal to the output of said delay circuit to obtain at the output of said adder said color video signal.

Claim 14

A color video signal generating apparatus comprising image pickup means having a scanning surface adapted to convert images projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming on said scanning surface a color separated image in accordance with the color components of said object, index electrodes disposed in close proximity to said scanning surface, first circuit means connected with said index electrodes for electrically forming on said scanning surface an index image having a phase that changes alternately in successive periods of said electrical output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, a signal electrode in close proximity to said scanning surface for extracting said composite signal from the latter, and second circuit means connected with said signal electrode for separately obtaining said index signal and said color video signal from said composite signal and which comprises a delay circuit for delaYing said composite signal by one of said periods of said electrical output, and an adder circuit to add said composite signal to the output of said delay circuit to obtain at the output of said adder said color video signal.

Claim 15

Apparatus in accordance with claim 11 wherein said second circuit means further comprises a subtraction circuit to obtain a difference signal between said composite signal and the output from said delay circuit to obtain at the output of said subtraction circuit said index signal.

Claim 16

Apparatus in accordance with claim 12 wherein inversion means are provided for reversing the polarity of said index signal and switch means are disposed after said inversion means for alternately passing said subtraction signal and said polarity reversed index signal.

Claim 17

Apparatus in accordance with claim 13 wherein said output of said switch means and said color video signal are applied to demodulator means to obtain at the output thereof signals corresponding to the color components of said object.

Claim 18

A color video signal generating apparatus comprising image pickup means having a photoconductive surface for the photoelectric conversion of images projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming a color separated image of said object on said surface, means for forming on said surface an index image having a phase that changes alternately in successive periods of said output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, at least one delay circuit means for delaying said composite signal by one of said periods, adding circuit means for adding the output of said delay circuit means and said composite signal to produce said color video signal as an output from said adding circuit means, subtracting circuit means receiving said composite signal and said output of the delay circuit means to produce said index signal as the difference therebetween, and means controlled by said index signal for separating individual color component signals from said color video signal.

Claim 19

A color video signal generating apparatus comprising image pickup means having a photoconductive surface for the photoelectric conversion of images projected thereon into an electrical output, filter means disposed between said surface and an object to be reproduced for forming a color separated image of said object on said surface, means for forming on said surface an index image having a phase that changes alternately in successive periods of said output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image, at least one delay circuit means for delaying said composite signal by one of said periods, adding circuit means for adding the output of said delay circuit means and said composite signal to produce said color video signal as an output from said adding circuit means, subtracting circuit means receiving said composite signal and said output of the delay circuit means to produce said index signal as the difference therebetween, and means controlled by said index signal for separating individual color component signals from said color video signal.

Claim 20

A color television camera comprising a surface scanned by an electron beam for converting light projected on said surface into an electrical output, filter means disposed between an object in the field of view of the camera and said surface for forming on said surface a color separated image of said object made up of image elements corresponding to the color components of respective elements of said object, a pair of index electrodes for each of said image elements and which are disposed in close proximity to said surface, and circuit means applying different electrical potentials to said index electrodes of each said pair thereof for electrically forming an index image on said surface and reversing said different electrical potentials in successive periods of said electrical output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image and having its phase reversed in said successive periods.

Claim 21

A color television camera comprising a surface scanned by an electron beam for converting light projected on said surface into an electrical output, filter means disposed between an object in the field of view of the camera and said surface for forming on said surface a color separated image of said object made up of image elements corresponding to the color components of respective elements of said object, a pair of index electrodes for each of said image elements and which are disposed in close proximity to said surface, and circuit means applying different electrical potentials to said index electrodes of each said pair thereof for electrically forming an index image on said surface and reversing said different electrical potentials in successive periods of said electrical output so that said electrical output is a composite signal containing a color video signal corresponding to said color separated image and an index signal corresponding to said index image and having its phase reversed in said successive periods.

Claim 22

A color television camera according to claim 16, in which said filter means includes groups of stripe-shaped filter elements transmitting light of respective primary colors and arranged in a repeating cyclic order, and there is a pair of said index electrodes for each of said groups of filter elements, with said index electrodes being also stripe-shaped and extending parallel to said stripe-shaped filter elements across the line-scanning direction of said electron beam.

Claim 23

A color television camera according to claim 17, in which said circuit means is synchronized with the line scanning by said electron beam to effect said reversing of said different electrical potentials in successive line scanning periods of said electron beam.

Claim 24

A color television camera According to claim 16, further comprising additional electrode means in close proximity to said surface for deriving said composite signal from the latter.

Claim 25

A color television camera according to claim 16, further comprising additional circuit means connected with said index electrodes for deriving said composite signal from the latter.

Claim 26

A color television camera according to claim 16, wherein said surface scanned by the electron beam is formed on a photoconductive layer.

Claim 27

A color television camera according to claim 16, wherein said index electrodes are transparent.

Claim 28

A color television camera according to claim 16, wherein said index electrodes abut against said surface.

Claim 29

A color television camera according to claim 16, wherein said index electrodes are disposed between said object and said surface and said filter means is disposed between said object and said index electrodes.

Claim 30

A color television camera according to claim 16, wherein said index electrodes are insulated from each other.

Claim 31

A color television camera according to claim 16, wherein a semi-insulating material interconnects said index electrodes of each said pair thereof.