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Early patents related to phase contrast
Posted: Fri Oct 11, 2019 2:51 pm
by apochronaut
A couple of patents related to the early years of the development of phase microscopy.
1942 application /1947 grant
https://patents.google.com/patent/US2427689A/en
1948 application/1951 grant
https://patents.google.com/patent/US2565419A/en
Re: Early patents related to phase contrast
Posted: Fri Oct 11, 2019 6:26 pm
by MicroBob
Hi Phil,
in the first American Optical patent names several patents from 1907 onwards. It would be interesting to research how much invention Zernike actually did.
Bob
Re: Early patents related to phase contrast
Posted: Fri Oct 11, 2019 7:59 pm
by MichaelG.
Re: Early patents related to phase contrast
Posted: Sat Oct 12, 2019 2:46 am
by KurtM
May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you.
Re: Early patents related to phase contrast
Posted: Sat Oct 12, 2019 7:08 am
by MichaelG.
KurtM wrote: ↑Sat Oct 12, 2019 2:46 am
May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you.
Sorry, Kurt ... I don’t see the problem
I would be happy to comply with your request if I knew what was wrong.
Zernike was a man
Patents are a claim of novelty of invention
Phase Contrast is a technique
We are building a list.
MichaelG.
Re: Early patents related to phase contrast
Posted: Sat Oct 12, 2019 5:43 pm
by 75RR
KurtM wrote: ↑Sat Oct 12, 2019 2:46 am
May I respectfully request a distillation of this thread in plain English for us Earth People? Thank you. 8-)
It all started with this thread:
viewtopic.php?f=6&t=8158 in which a consensus was reached that DIC did not make Phase obsolete.
then another thread based on a link to an illumination technique called Relief Phase posted in the first thread was started:
viewtopic.php?f=28&p=71653#p71596
This thread was a little ragged, with members speculating on whether Zernike dressed to the left or the right and in what year Phase was commercially available; turns out it was 1941.
lastly this thread with links to Phase patents was subsequently posted.
Re: Early patents related to phase contrast
Posted: Sun Oct 13, 2019 2:03 am
by KurtM
Thanks, 75 - that's perfect.
MichaelG., sorry I was less than clear, but 75RR got us covered so all is well. Thanks again, amigo.
Re: Early patents related to phase contrast
Posted: Sun Oct 13, 2019 9:05 am
by MichaelG.
As some bloke from Stratford-upon-Avon wrote:
All’s well that ends well
MichaelG.