tag:blogger.com,1999:blog-19092890.post6734681585143987810..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: See Device Startup Proposes "Quantum PATPD Pixel"Vladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-19092890.post-59629139728177339652023-07-18T01:21:17.554+03:002023-07-18T01:21:17.554+03:00In the year 2005, Founder and CEO of Seedevice, Dr...In the year 2005, Founder and CEO of Seedevice, Dr. Hoon Kim (Thomas Kim), was one of the main character of CMOS image sensor scam of Planet82 Inc. in Korea.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-18978377973976425872020-07-11T08:57:30.392+03:002020-07-11T08:57:30.392+03:00https://image-sensors-world.blogspot.com/2007/07/p...https://image-sensors-world.blogspot.com/2007/07/planet82-under-investigation.htmlVladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-90075392532372180652020-07-11T07:56:45.495+03:002020-07-11T07:56:45.495+03:00"I'm told that the registered agent of Pi..."I'm told that the registered agent of Pixel Device Inc, Hoon Kim, has the same name as the CTO of infamous Planet82 company. Does anybody know if this is the same person?"<br /><br />- WHY is Plantet82 an infamous Korean company? What did they do way back?<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-58796392737474792612019-12-09T09:21:30.152+02:002019-12-09T09:21:30.152+02:00Yes, same guy. When you look at the patents, it me...Yes, same guy. When you look at the patents, it mentioned about planet 82. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-83980153211438881102019-07-19T15:01:48.095+03:002019-07-19T15:01:48.095+03:00Interesting idea. They seem to rely on free-electr...Interesting idea. They seem to rely on free-electron light absorption in sub-bandgap NIR band. So, the absorption coefficient is very low and their QE is supposed to be low as well.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-32768240926361507402019-07-18T22:27:05.716+03:002019-07-18T22:27:05.716+03:00Assuming that the gain is independent of wavelengt...Assuming that the gain is independent of wavelength, there are sum strange things going on. The sensitivity changes by two orders of magnitude per decade, suggesting a lambda square relationship of quantum efficiency. What is this? <br /><br />Regardless of absolute magnitude, assuming that the IQE at the maximum is 1, we end up with <5% IQE in the visible range...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-32196676398558066582019-07-18T22:17:30.144+03:002019-07-18T22:17:30.144+03:00Well, how about this patent? https://patents.googl...Well, how about this patent? https://patents.google.com/patent/US9735188B2/ <br /><br />It seems to describe a photodetection mechanism based on hot carrier tunneling. Gain may be high, but the detection volume would be rather small...<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-72001977056117827472019-07-18T15:26:44.369+03:002019-07-18T15:26:44.369+03:00"Quantum" and "nanotechnolgy" ..."Quantum" and "nanotechnolgy" are keywords that always trigger my bullsh*t-meter. On the other hand it would be quite arduous to model dirt and row noise for a fake demonstrator. Further digging around lead me to this: <br />https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-4-4284<br /><br />Seems relevant and would confirm the dark current challenge this sensor has. <br />If they really went from a silicon ridge wave guide to a functional VGA sensor in two years then hats off to them!<br /><br />But I still have some issues with the table given. Mixing responsivity with QE is just wrong and the frame rates for the Python and CMV sensors are 750 and 480fps, respectively. <br /><br />JHAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-51760505061471983612019-07-18T01:30:13.962+03:002019-07-18T01:30:13.962+03:00Assuming this is based on something besides total ...Assuming this is based on something besides total fiction, it seems quantum dots or something similar would be consistent with the A/W metric, the extended response, and the term quantum sensors. Perhaps photon-assisted tunneling has something to do with carriers escaping the dot. I am just speculating for the fun of it. I enjoyed the "bright light comparison" including all the row noise.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-25824271523813228872019-07-17T14:01:05.471+03:002019-07-17T14:01:05.471+03:00How about a real QE curve separated from the gain ...How about a real QE curve separated from the gain mechanism.Anonymousnoreply@blogger.com