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Systematic design of microscope objectives Part I, II and III

https://www.researchgate.net/publicatio ... d_analysis

https://www.degruyter.com/document/doi/ ... -0013/html

https://www.degruyter.com/document/doi/ ... -0014/html

Sample:
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Very interesting paper on an amazing optical invention. Thanks!

That's a really unique and pretty exhaustively reasearched paper, briefly mentioned a few times on the forum. Useful somewhat to , if one is wont to break down and try to repair a complicated objective. The patents are mostly all there for what is covered. One thing I found a bit odd is the omission of the B&L semi-objective series, even from the broader list of objectives and their patents. They are very unique and interesting from a design and quality point of view but maybe they don't really represent a milestone in the systematic design of microscope objectives because the concept was a bit off the beaten path, even if it was brilliant.
He( they, including his advisor) show a progression over time and how each milestone influenced the next. The llustration of a multi- layer embedded front lens you show goes back to a 1960's design by Arthur Shoemaker at AO as part of their seminal development of the first infinity corrected diascopic system, subsequently influencing virtually all other future objective designs. It's construction is shown very early on in the paper. That concept probably first arrived on the scene comercially in the cat.# 1022 and 1023 planachro objectives, sometime around 1966.

apochronaut wrote: ↑

Wed Sep 01, 2021 12:00 pm

One thing I found a bit odd is the omission of the B&L semi-objective series, even from the broader list of objectives and their patents. They are very unique and interesting from a design and quality point of view but maybe they don't really represent a milestone in the systematic design of microscope objectives because the concept was a bit off the beaten path, even if it was brilliant.

Is there a good online reference for the B&L semi-objectives? I'm curious about their design.

if you do a google search on "baffling balplan" you might find some information.

Not really, aside from some patents and what has been posted here. If you search patents given to Bausch & Lomb invented by Harold E. Rosenberger, James Benford or George Aklin, much of the system should show up; I believe that George Aklin was the principal engineer on the project and did a lot of the design too.
Could that be the same James Benford that is involved with NASA now?

I will find some internal links to the forum and post them later.

This one gets you to some online patent stuff and my older thread.
viewtopic.php?f=5&t=12945
Jay Margolis' post.
viewtopic.php?t=11305

Thank you all for the information. Learnt something new and fascinating.

See also : viewtopic.php?f=15&t=13102&p=105487&hil ... er#p105487

MichaelG.

MichaelG. wrote: ↑

Thu Sep 02, 2021 11:35 am

See also : viewtopic.php?f=15&t=13102&p=105487&hil ... er#p105487

MichaelG.

Had missed that. Sorry patta and viktor j nilsson