tag:blogger.com,1999:blog-401164737462963207.post8409319221707081081..comments2024-03-28T00:14:10.834-07:00Comments on Ben Krasnow: DIY Scanning Electron Microscope - Image Quality Improvements 2Ben Krasnowhttp://www.blogger.com/profile/04234629396863486242noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-401164737462963207.post-21474140849940860882017-06-23T07:21:49.613-07:002017-06-23T07:21:49.613-07:00give him a job :)give him a job :)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-49095087590023069572011-06-18T12:44:20.787-07:002011-06-18T12:44:20.787-07:00Ravaner, the first lens is known as a condenser le...Ravaner, the first lens is known as a condenser lens, and it has the same potential as the wehnelt cylinder in the electron gun. This means that as the acceleration voltage of the electron gun is changed, the voltage on the condenser lens also changes, thus maintaining approximately the same focal length. Faster moving electrons (generated by higher acceleration voltages), will need to experience a higher electric field to be deflected an equal amount.Ben Krasnowhttps://www.blogger.com/profile/04234629396863486242noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-14795537559133120112011-06-17T12:08:34.607-07:002011-06-17T12:08:34.607-07:00Hello Ben. Could you tell me what is the voltage o...Hello Ben. Could you tell me what is the voltage of the first focusing lens (aluminium tube between 2 copper pipes), is it the same as filament ?Ravanernoreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-10608985756580032102011-06-07T07:00:49.042-07:002011-06-07T07:00:49.042-07:00Hi Ben, I'm a researcher and SEM operator in t...Hi Ben, I'm a researcher and SEM operator in the nanotech industry, and seeing someone make their own SEM is simply awesome. Could the blurriness in the images be due to aperture misalignment or stigmation issues? Also, what is your working distance? Great job here, I'll be following and watching for updates!Brewbeardhttps://www.blogger.com/profile/14887610512659686865noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-23639495859630501962011-05-25T21:08:25.312-07:002011-05-25T21:08:25.312-07:00Chris, sorry that I missed you. You can email me:...Chris, sorry that I missed you. You can email me: ben at magconcept com. I'll check out the Noisebridge mailing list. Let me know when you guys will be using the SEM again, and I will see if I can make it.Ben Krasnowhttps://www.blogger.com/profile/04234629396863486242noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-56706488340140441882011-05-25T18:05:00.697-07:002011-05-25T18:05:00.697-07:00Ben,
We met at maker faire but I failed to get y...Ben, <br /><br />We met at maker faire but I failed to get your contact info. We will be powering up the Noisebridge SEM at 7pm tonight. Please stop in. Sorry for the short notice. Send me a message on the Noisebridge SEM mailing list. <br /><br />Chris MurphyChrishttps://www.blogger.com/profile/10847572322348211647noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-47216812175799019162011-05-07T00:30:58.052-07:002011-05-07T00:30:58.052-07:00Incredible machine you have built yourself.Incredible machine you have built yourself.Anonymousnoreply@blogger.com