Turns out my brother, an ME, runs a small custom lens and mirror manufacturing business across town. What they do is not classified, but some of things their product is used for is. A non-classified lens he told me about making was for the Boeing 747-housed military test laser that was in the news some years ago. Anyway, he says they have the best surface finish in the business as standard. They have lens grinding and polishing machines in tightly temperature regulated rooms. The lenses and laser mirrors are still made in mostly traditional ways by old German artisans who know how. A sister company also in Northern California are the experts at coatings.
When was your last contact with him?Richard is alive and I presume, OK.
The modern advantage is diamond dust. Cuts fast and can be with lots of effort found in a wide range of grits.
My father used to prepare and lap samples for huge castings like hydro-electric generators. My mother threw out his collection of diamond grits as well as his Lietz microscope which he took when Allis Chalmers was shut down. I did manage to save his platinum crucibles.
I am teaching three of my guys hand lapping to restore some machine tools. The modern advantage is diamond dust. Cuts fast and can be with lots of effort found in a wide range of grits.
That's precisely why it was considered not good for polishing astronomic grade mirrors, it's way too aggressive, red ferric oxide and ceric oxide were the only good options, at the time. Otherwise, diamond dust was available 40 year ago as well.
I remember learning about compensating lead screw errors over 40 years ago, it was old school then. I doubt there were one or two who could make them....I vaguely remember the same issue with lead screws, apparently there were less than two or three people who could make them.
Soulthern,
I heard from Richard only a week ago.
Thanks to both of youRichard is on Facebook and quite active. John is also on Facebook.
Last post on F.B.: 13 jun 2019 !Richard is on Facebook and quite active.
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^Be mindful of FB's privacy settings, he could have plenty of post after that date that aren't public facing. In all senses, I'm sure you could ping him via FB.
I heard from Richard, today. He is still active.
I tried to contact him, but no answer. Did he change his email?
Damir
John Сurl. Analog devices have many vacancies. Can't they find specialists? Or low salaries and people do not want to get a job in this field of activity? They also have teleworking for a home office.
Careers at Analog Devices | Analog Devices Jobs
Careers at Analog Devices | Analog Devices Jobs
They refused to hire me in the early '80's because I did not attend MIT, or apparently another similar university. They were very territorial back then, I presumed. At least this is what I was told then by Scott Wurcer.
Linear engineers appear to be in short supply. This is probably because digital is so dominant, and the universities don't teach a much linear theory anymore. Many of our best designers today are East European these days.
I succeeded to join Richard with with Facebook.I tried to contact him, but no answer. Did he change his email?
Damir
Most likely now, too. Apparently, they are somehow connected with this school of knowledge. Yesterday I was looking for PSpice models for operational amplifiers on their website. And they only have models for very old products. And they still constantly refer to the Massachusetts Institute of Technology. Perhaps their leaders ended it. And they are recruiting the same. I remembered that they had a warning about risk, responsibility and the use of the computer model. They pointed to Massachusetts law. Thanks.They refused to hire me in the early '80's because I did not attend MIT, or apparently another similar university. They were very territorial back then, I presumed. At least this is what I was told then by Scott Wurcer.
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I lived and worked in Massachusetts for 15 years. The closest I ever came to working for ADI was when I dated the daughter of an engineer that worked there. He was famous in that family for seasonally boiling down maple syrup, until the wallpaper started falling off in their kitchen.
Sounds like an "analog engineer" to me. I too was an analog engineer - at Digital.
Sounds like an "analog engineer" to me. I too was an analog engineer - at Digital.
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