2002-09-26
I don't think the 4/3 refers to inches at all. If you look down the chart, the 4/3 is listed as the aspect ratio. That is, the dimensions are 4 units long and 3 units high. If you look again at the chart the photoactive area is given as 17.8 �m x 13.4 �m. 17.8 x 3/4 = 13.4 and 13.4 x 4/3 = 17.8. If I'm not mistaken, the VHS video camera CCD sensor was called a 2/3 inch sensor. Now that I see this page, I think the 2/3 had nothing to do with inches, but was the width to length aspect ratio of the device. This is getting to the point of utter ridiculousness placing the term "inches" where it does not apply. An aspect ratio is unitless. Markus and Michael, since you are both fluent in German, you need to contact PC welt and straighten them out. They really need to stop parroting inches or zoll with out verifying if inch is real or used as a trade name and to start using metric trade names where they apply when writing in German. I'm sure they think a 3.5 zoll floppy is 88.9 mm instead of the true 90 mm width. Point them to this page shown below and show them that nothing is in zoll. John Subject: [USMA:22352] Re: 2 metric companies developing non-metric devices > I'm puzzled, as to what dimension in that system will be 4/3". The > sensor shown on > > http://www.kodak.com/country/US/en/digital/ccd/kaf5100ce.shtml > has an image area diagonale of 22.3 mm. >
