Colour television camera

Claim 2

A color television camera for providing a signal in accordance with a selected standard comprising an optical means for projecting differently colored images and for spatially compressing at least one of said images by a selected compression factor, a pick up device means disposed proximate said optical means and having an input means for receiving said projected images and an output means for providing a line and field scanning output sequential electrical signal of said images, said compressed image being provided by said output means during at least part of a normal line blanking time of said selected television standard and an uncompressed image being provided by said output means during the normal line scanning time of said standard, and a signal expansion-delay stage having an input coupled to said pick up device means output for receiving said sequential signal and an output means for providing a simultaneous television signal in accordance with said standard.

Claim 3

A colour television camera as claimed in claim 1, wherein the optical means comprises two compression optical systems and two colour filters, each filter having a different light transmission characteristic, each compression system providing a compressed image in the line scan direction near the non-compressed image.

Claim 4

A colour television camera as claimed in claim 2 wherein the compression optical system provides a reduction of the image in one direction.

Claim 5

A colour television camera as claimed in claim 2, wherein said two compression-optical systems provide the compressed images on either side of the non-compressed image as considered in the line scan direction.

Claim 6

A colour television camera as claimed in claim 4 further comprising a deflection generator disposed about the pick-up device and having a different scan time duration during alternate lines and during each line the scanning time of the-non-compressed image is the standard line scan period and every other line the scanning of the compressed images present on either side is during part of the standard line blanking period.

Claim 7

A colour television camera as claimed in claim 5, further comprising a first controlled change of state switch having an input and first and second outputs, the pick-up device output being coupled to said input of said controlled change-of-state switch which input is connected during at least the standard line scan periods to said first output, an output of the camera coupLed to said first switch output, said input being connected during part of the standard line blanking periods to said second output said second output being connected to the expansion-delay stage input, said stage having two outputs one comprising means for conveying an expanded signal and the other comprising means for conveying a signal delayed during one line period, a second controlled two pole two throw change-of-state switch having two inputs coupled to said one stage output, two other inputs coupled to said other stage output, and two outputs comprising second and third outputs of the camera conveying colour signals suitable according to the standard.

Claim 8

A colour television camera as claimed in claim 6, wherein the expansion-delay stage comprises an expansion and a delay unit which are each controlled through clock pulses and comprise controlled semiconductors and capacitors disposed between said semiconductors. said units and the controlled change-of-stage switches each comprise a control input, and a control circuit comprising a clock pulse generator and frequency dividers connected to said control inputs.

Claim 9

A colour television camera as claimed in claim 7, further comprising a third controlled change-of-state switch having an output coupled to said expansion unit and two inputs said control circuit includes a first frequency divider connected between said two inputs of the third change-of-state switch, the division number of said frequency divider being equal to said compression factor.

Claim 10

A colour television camera as claimed in claim 8, further comprising a fourth controlled change-of-state switch coupled to said delay unit, to a reference potential and to the said control circuit, the control circuit being connected to the said frequency divider.

Claim 11

A colour television camera as claimed in claim 8 wherein said said control circuit comprises a plurality of serially coupled frequency dividers, the last divider comprising a two-to-one divider means for providing a half line frequency to the said two-fold change-of-state switch, a penultimate frequency divider has a division number equal to one plus the compression factor, a pulse shaper having inputs coupled before and after the penultimate frequency divider of the control circuit and an output means connected to the said third and fourth single-fold change-of-state switches for providing a switching signal.

Claim 12

A colour television camera as claimed in claim 10, wherein said control circuit includes a frequency divider coupled between the first and the penultimate frequency divider and has a division number which upon multiplication of the said compression factor produces a product term which is at least equal to a product term of twice the line scan period and a desired bandwidth of the said of colour signals to be applied by the camera to the outputs.