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Single Image Tube, Color TV Camera

IP.com Disclosure Number: IPCOM000090712D
Original Publication Date: 1969-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Brookman, JW: AUTHOR [+2]

Abstract

This single-gun color tube utilizes a conventional vidicon pickup unit 4. A represents the image. The arrangement uses image lens 1, transfer lens 2, and vidicon target 5. Filter 3 bears vertical stripes of red, green and blue which cover it completely. Filter 3 is in the image plane of lens 1 and the object space of lens 2. Target 5 is in the image plane of transfer lens 2. Thus, image A appears as image A' on target 5.

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Single Image Tube, Color TV Camera

This single-gun color tube utilizes a conventional vidicon pickup unit 4. A represents the image. The arrangement uses image lens 1, transfer lens 2, and vidicon target 5. Filter 3 bears vertical stripes of red, green and blue which cover it completely. Filter 3 is in the image plane of lens 1 and the object space of lens
2. Target 5 is in the image plane of transfer lens 2. Thus, image A appears as image A' on target 5.

Vidicon 4 has a deflection unit 8 which deflects the vidicon beam to read out a signal across load resistor 6 which is then amplified by amplifier 7. The output of amplifier 7 is applied to analog And's 10, 11, and 12. These And's provide an output of the vidicon signal when they receive a 1 from a three-phase clock 9. The clock 9 has three outputs with 1's appearing serially on one of the outputs of clock 9. Thus, only one And 10, 11 or 12 is turned on at a time. Clock 9 is driven in phase with the horizontal deflection signal of unit 8. For every horizontal sweep, an And is turned on the same number of times as there are corresponding filter stripes. Thus, the time period that And 10 is on is when red information is provided. When gate 11 is on, the timing is such that only green information is passed through it. When And 12 is on, only blue information is passed.

The outputs of And's 10 11 and 12 are passed through corresponding pulse stretchers 13, 14, and 15 which force each video sample to have a minimum l...