{"id":611,"date":"2011-01-14T12:12:59","date_gmt":"2011-01-14T12:12:59","guid":{"rendered":"http:\/\/harvestimaging.com\/blog\/?p=611"},"modified":"2011-01-14T12:12:59","modified_gmt":"2011-01-14T12:12:59","slug":"continuation-of-the-blog","status":"publish","type":"post","link":"https:\/\/harvestimaging.com\/blog\/?p=611","title":{"rendered":"Continuation of the blog"},"content":{"rendered":"

\u00a0<\/p>\n

After finishing the long series of PTC stories, I asked for new ideas and suggestions for this blog.\u00a0 <\/span>I got several reactions through this blog, through the <\/span>www.image-sensors-world.blogspot.com<\/span><\/a> as well as through private mail communication.\u00a0 <\/span>And the result is that for the time being I will continue for\u00a06 or\u00a07 more blogs around the PTC.\u00a0 <\/span>As you should be aware of, I developed a software tool to simulate images and to study the influence of different noise sources and specification parameters on the image quality.\u00a0 <\/span>I will use this software tool to illustrate the effect on the PTC analysis of the following parameters :<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Temperature at which the camera is running,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Number of photons,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Conversion gain,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>QE specification,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Number of ADC bits,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Non-linearity of the readout node and the source-follower.<\/span><\/span><\/p>\n

Because I do not want to repeat over and over all the settings of the sensor and the camera, I will list the \u201cstandard\u201d settings here that will be use in all further simulations (unless otherwise specified).\u00a0 <\/span>Here they are :<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Sensor size : 640 x 480,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Number of images generated : 25,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Conversion gain : 40 \u00b5V\/e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Analog gain : 1,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Temperature : 30o<\/sup>C,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Exposure time changing from 0 s to 6.5 s,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Number of ADC bits : 12,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Dark current : 200 e–<\/sup>\/s at 22o<\/sup>C,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Dark random non-uniformity : 30 e–<\/sup>\/s at 22o<\/sup>C,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Dark current doubling temperature : 8o<\/sup>C,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Saturation level : 17,500 e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Number of photons : 150,000\/s,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>QE : 33 %,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Saturation level non-uniformity : 5 %,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>DC offset of the output : 125 mV,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Output amplifier noise : 0.3 mV,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Temporal row noise : 6 e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Fixed pattern row noise : 3e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Repetition frequency row FPN : 16 lines,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Temporal column noise : 8 e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Fixed pattern column noise : 12e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Temporal pixel noise : 10 e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Fixed pattern pixel noise (offset) : 3 e–<\/sup>,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Defects : 100 pixels stuck at \u201c1\u201d, 100 pixels stuck at \u201c0\u201d,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>RTS pixels : 900 pixels, RTS chance : 20 %,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Non-linearity SF : switched off,<\/span><\/span><\/p>\n

–<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>Non-linearity FD : switched off.<\/span><\/span><\/p>\n

When studying the influence of the aforementioned parameters, the first measure taken is the correction of the defect pixels.\u00a0 <\/span>With this knowledge in hand, the first exercise can start : what is the temperature influence on the PTC, or how can the temperature being used to generate a Photon Transfer Curve ?\u00a0 <\/span>The answer will follow shortly.<\/span><\/span><\/p>\n

\u00a0<\/p>\n

Albert, 14-01-2011.<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0 After finishing the long series of PTC stories, I asked for new ideas and suggestions for this blog.\u00a0 I got several reactions through this blog, through the www.image-sensors-world.blogspot.com as well as through private mail communication.\u00a0 And the result is that for the time being I will continue for\u00a06 or\u00a07 more blogs around the PTC.\u00a0 […]<\/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-611","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/611","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=611"}],"version-history":[{"count":6,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/611\/revisions"}],"predecessor-version":[{"id":617,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/611\/revisions\/617"}],"wp:attachment":[{"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/harvestimaging.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}