Early patents related to phase contrast

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apochronaut
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Early patents related to phase contrast

#1 Post by apochronaut » Fri Oct 11, 2019 2:51 pm

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

MicroBob
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Re: Early patents related to phase contrast

#2 Post by MicroBob » Fri Oct 11, 2019 6:26 pm

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

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Re: Early patents related to phase contrast

#3 Post by MichaelG. » Fri Oct 11, 2019 7:59 pm

Too many 'projects'

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KurtM
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Re: Early patents related to phase contrast

#4 Post by KurtM » 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-)
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)aol(dot)com
http://sawdustfactory.nfshost.com/microscopes/
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MichaelG.
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Re: Early patents related to phase contrast

#5 Post by MichaelG. » Sat Oct 12, 2019 7:08 am

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-)
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.
Too many 'projects'

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75RR
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Re: Early patents related to phase contrast

#6 Post by 75RR » Sat Oct 12, 2019 5:43 pm

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.
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)

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Re: Early patents related to phase contrast

#7 Post by KurtM » Sun Oct 13, 2019 2:03 am

Thanks, 75 - that's perfect.

MichaelG., sorry I was less than clear, but 75RR got us covered so all is well. Thanks again, amigo.
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)aol(dot)com
http://sawdustfactory.nfshost.com/microscopes/
https://www.flickr.com/photos/67904872@ ... 912223623/

MichaelG.
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Re: Early patents related to phase contrast

#8 Post by MichaelG. » Sun Oct 13, 2019 9:05 am

As some bloke from Stratford-upon-Avon wrote:

All’s well that ends well

MichaelG.
Too many 'projects'

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