SU474954A1 - Transmitting single tube camera - Google Patents

Description

(54) TRANSMITTED SINGLE-TUBE CALOELER

The de-signal S (f) obtained by the output of the transmitting tube R, the frequency 11a component in the adjacent rows of each half-frame has the opposite polarity.

A rotating disk 5 with light filters made in the form of alternating sectors and transparent to blue or yellow rays, which are replaced with the rotation of the disk with the frequency of changing the fields of the transmitted image, is installed in front of the dashed light filter 4 along the path of light rays that have passed through the lens.

The complex video S (t), which is fed from the output of the transmitting tube 2, is fed to the input of video amplifier 5, and from its output is fed to the input of the wideband line 7, which delays the signal for the row time.

The signals taken from the input line 7, and the signals delayed by the line time taken from its output, go to the input of the summator 8, which forms a flatband signal Ey.

The same signals are input to the evaluator 9, with the help of which the high-frequency component Ep, is amplified, amplitude modulated and followed by red (E)) blue (EC) signals and field-matching images from the composite video signal S (t).

From the output of the subtractor, the modulation signals of the modulator are high-frequency by yuccia, .- ,,, are supplied to the am or the actions: at detector 10, from which loads the modulating consecutive signals of ER / EB are generated.

These signals are fed to the low-pass filter 12, and are also applied to the subtractive matrix 13, forming a broadband Sial Ea, to the other input of which Sial Eu is applied.

The EC / EB sigals, sourced from the output of the amplitude detector 10, also arrive at the input of line 16.

In the future, alternating signals are ECs and EI; alternately remove from the output of line 16 and from its output and lead to the input of the electronic switch 17, with the help of which they generate simultaneous signals Ец and ЕВС Signal 3 (1), removed from the output of the video amplifier 6, also the filter input // , from the output of which the signal S (t) and the input to the subtracting matrix U4, where they simultaneously connect the EREB signals from the output of the amplitude detector 10. The output of the subtracting matrix 14 of the connection with the mixer 18.

To another input of the mixer 18 receives a signal from the output of the bandpass filter 15, and connected to the output of the subtractive matrix 13.

When the camera is working, the green rays reflected from the transmitted object pass through each of the sectors of the rotating disk with light filters and through the entire surface of the line filter.

The red rays go through only through the yellow sectors of the disk 5 with light filters and through the transparent strips of the linear filter 4. The blue rays penetrate only through the blue sectors of the disk with light filters and through the irradiated intervals of the light filter, respectively.

In this case, the nominal value of the frequency of the RP depends on the angle of inclination of the light and the light. filter a and the width of these suction d. In accordance with the above, the signal at the output of the transmitting tube 2, which works in combination with the line filter 4, can be described by the expression

S (1) Ec, + 0, ± (aEP / avEp) sin with ,, /,

where O; ,, UB are coefficients depending on

modulation depths.

The ± signs indicate the phase rotation of the high-frequency component in the adjacent rows of the half-frame.

The signal S (t) is amplified in the video amplifier and simultaneously arrives at the input of line 7 and at the inputs of the adder 8 and the subtractor 9. Signals taken from the output of the line 7, receive the second inputs of the adder 8 and the subtractor 9. In the adder 8 after adding delayed and undelayed signals S (i) of two adjacent rows of antiphase components

± (a, {ЕцавЕ;) 5, 1

mutually compensated and a broadband sitnal is formed at the output

EU 2Eo + EPEp.

Correspondingly, in the subtractor, the components of the E– signal are compensated and, at the output, the components of the frequency f ,,, modulated in amplitude by successive signals.

Modulating signals Ep, Ev, with the help of an Alclit detector, feed the subtractive matrix 13, with which a broad-banded sigal of the green color separation of the EG image is formed from the signal Eu. The signals EnE, in addition, pass through a low-pass filter 12 and enter the input of line 16, in which each of the third signals is delayed for the duration of one half-frame.

Subsequently, each of the consecutive signals is alternately fed to an electronic switch 17, where these signals are converted into signals at the same time, E and EB, in which the signals of the skipped half-frames are replaced by the signals of the previous half-frames.

By selecting the width of the strips of the dashed light filter d and their angle of inclination, and the frequency of the high-frequency component can vary within wide limits and can, in particular, be set to 1.5-1.8 MHz. The output signal S (f), taken from the output of video amplifier 6, additionally connects to the input of the filter 11 of frequency 11, where the high-frequency components of the G signal are excluded from it. The converted signal S (t) obtained at the output of the low-pass filter // can be identified by the expression S (t) Eo + 0.5 (). The signal S (l) is iodized to the subtractor 14, where it is excluded the ecsE signals, the components of which enter the input of the matrix 14 from the output G. of the l, 1 detector of the detector 10. As a result of the output of the matrix 14, the green color-separated image EO is received whose frequency band is limited by the filter //. To the GOTP signal of the mixer, the high-frequency components of the signal Ec, (sd signals), selected by a band-pass filter, are added. After all the operations described above, a broadband green color separation image E OO, P + ohc is generated at the output of the mixer 18, which contains complete information about the clarity of the green color separation: an effective image that is sufficient for obtaining a high-quality color image. The subject matter of the invention 1. Transmitting single-tube color television camera with phase separation of the c :: ete spigiglolo. containing a lens transmitting tube, in front of which is installed an optical filter formed by transparent and colored stripes, a video amplifier and a block dividing color signals consisting of a delay line, an adder, a subtractor, an amplitude detector, a subtracting matrix and an electronic switch, different that, for the purpose of increased sensitivity, there is a rotating disk with light filters of blue and yellow light between the lens and the line filter, and between the output of the amplitude detector of one of the The low-pass filter and the block that delays the signal of the i-frame duration are in series connected to the inputs of the electronic switch, while the dash light is made of transparent and green fibers. 2. The camera according to claim 1, differs from the fact that, in order to increase the resolution, insert a band-pass filter into it, mix; b, dopoliitelny fnltr lowpass and vychitayuscha matrix, wherein dopoliitelny lowpass filter dopol1Ts1tely1a vychitayuscha matrix and a mixer included iosledovatelno to the output video amplifier, a second input of the mixer through iolosovoy filter iodklyuchei to the output of subtractive matrix, wherein the second input dopoliitelnoy subtractive matrix signal is applied from the current detector of amplitude.

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