Already quite a bit of words are spent on the organic conductive sensors presented in the Panasonic papers.\u00a0 Nevertheless, here is some more info.<\/p>\n
Kazuko Nishimura presented the paper on the large HDR sensor with a low noise level.\u00a0 A few remarks about this sensor :<\/p>\n
–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HDR is obtained by two light sensitive areas within one pixel : one with low and one with high sensitivity.\u00a0 This is a very similar method as proposed long time ago by Fuji in their SuperCCD,<\/p>\n
–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 The pixels do suffer from kTC noise, but by means of a cleaver circuit\/feedback, they are able to reduce the remaining kTC noise to 1.2 e–<\/sup> reset noise and to 5.4 e–<\/sup> overall.\u00a0 In combination with a full well of 600 ke–<\/sup>, it creates a gorgeous dynamic range,<\/p>\n –\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 The process used to fabricate the sensor is 65 nm CMOS, 1P3Cu1Al,<\/p>\n –\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 The results mentioned are overall not bad, but there was no information provided about dark current, about quantum efficiency, about uniformity and about reliability of the material.\u00a0 So this suggests (to me) that there are still some issues to solve.<\/p>\n Sanshiro Shishido presented the paper on the global shutter version of the organic photoconductor sensor.\u00a0 The topplate of the photoconductor is made out of ITO and needs to be biased to larger voltages.\u00a0 But the overall light sensitivity of the organic photoconductor depends strongly on the exact voltage on the ITO gate.\u00a0 A lower voltage on the ITO gate lowers the light sensitivity and actually 0 V on the gate makes the sensor even blind.\u00a0 In this way one can create a global shutter functionality to the sensor.\u00a0 Moreover, one has the possibility to modulate the sensitivity during the exposure time, for instance, the exposure time can be split in parts in which the sensor will be sensitive and in parts in which the sensor will be insensitive.\u00a0 Even one has the option to modulate the sensitivity during the periods the sensor is sensitive by means of adapting the high voltage set to the ITO gate.\u00a0 Overall a nice technology !<\/p>\n The third paper of Panasonic, presented by Yoshihisa Kato had nothing to do with the organic conductive layer, but the sensor presented was provided with an EM-function.\u00a0 The latter is built in the vertical direction of the silicon.\u00a0 This is new and is never shown before in an imager (to my knowledge).\u00a0 The EM-functionality can be switched on and off by means of the voltage biasing the substrate (around 23 V).\u00a0 Amazing images were shown (shot at extremely low light levels).\u00a0 From the data shown, it looks like the EM is very strongly depending on the exact voltage on the substrate.\u00a0 In comparison to the well-known EM-CCD and EM-CMOS devices (which are on the market), the EM-multiplication in the latter is done with very small gain steps, but by doing multiple EM-steps finally a large gain can be reached.\u00a0 In the case of the Panasonic paper, the EM is done only once, so all the gain needs to be created in one step.\u00a0 Has this way of working advantages or disadvantages compared to EM-CCD and EM-CMOS ?<\/p>\n Albert, 04-02-2016.<\/p>\n","protected":false},"excerpt":{"rendered":" Already quite a bit of words are spent on the organic conductive sensors presented in the Panasonic papers.\u00a0 Nevertheless, here is some more info. Kazuko Nishimura presented the paper on the large HDR sensor with a low noise level.\u00a0 A few remarks about this sensor : –\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HDR is obtained by two light sensitive areas […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1531","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1531"}],"version-history":[{"count":3,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1531\/revisions"}],"predecessor-version":[{"id":1534,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1531\/revisions\/1534"}],"wp:attachment":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1531"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}