Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers -- Ignore unavailable to you. Want to Upgrade?

To: koan who wrote (32494)	2/10/2007 6:49:14 PM
From: E. Charters	Read Replies (1) \| Respond to of 78421

gold is more reflective than silver. but its coloured and inert. rhodium is more reflective still, but too expensive to be used and no change chem for photos. titanium is good too. but only silver has the chemistry for permanent quick oxide changes fixing etc.. silver indium tin moly yttrium hg te doped germanium silicon might allow better sensors without peltier cooling. colour film have 20 million pixels equivalent (Kodak claim) in a 24x36 film. (35 mm) 645 (120 format or medium) would have 53 million pixels in 200 asa colour. cheaper lenses too, to make at least. 4 X 5 inch is the best pro format. it is 300 million pixels in colour 200 asa, and in b and w it is 80 to 104 billion pixels in b and W. blow up to billboard size (21 feet square) is possible without seeing artifact. in fact the larger the blow up, the weaker the rez it can handle as the farther back you have to stand to look at it. So you can get away using a 24 x36 sensor in digital to make posters without much cleaning or curve work. you can see why when the roll out spy satellites that they use 8 inch by 10 inch plates. the 200 billion pixels they get allows over the viewing area of 50 X 50 miles, of 80 million pixels a square mile. that is only .25 square feet per pixel. with computer alias cleaning they can get to better than 4 times that resolution. it is like seeing through four miles of air at sea level, with a 1000 power telescope. They model refraction, by using radar for height, and using static models, and then they model heat, and clean edges to get better. Ilford holografic has 7 billion pixels in black and white. 3000 lines per mm. This means you can blow up to 3 feet by 4 feet from 35 mm and have to use a 40x hand lens and still not see grain. This is why for pro use and commerical government, film will not disappear overnite. all IR is rendered b and w and is becoming increasingly important. near ir computer colorized may become important for certain video and colour work in film and digital, as well as for rock and food id assembly line defect work and rock mechanics. right now wide range rt ingas sensors are outrageously priced. need monochromators/spectros in front to id stuff. but back end monochromotors/spec working with multi filter mosaics or with scanning and other breakthroughs very recently may see nir detection type cameras useful for all kinds of work come down to almost consumer prices.