Stereoscopic Microscope - Page 1
Forum section: electronics / general

author: @rt
author_rank: Super Contributor
timestamp: August 01, 2019, 11:02:42 am
content: HiHad a job interview with a practical part involving a stereo microscope. I probably did ok, but not because of the microscope.I presume your eyes sit back from the lenses a little, and I could bring the board into focus, but it seemed I could largely only see out of one eye.There was an adjustment to bring the eyepiece parts closer together, which might have helped there, but still there was never a time I could see easily.Is there something I’m obviously doing wrong there? It’s still not something I’m sure is solved.

author: igendel
author_rank: Frequent Contributor
timestamp: August 01, 2019, 11:19:38 am
content: My microscope has a little handle, that you can pull out in order to direct one of the lenses to a separate camera tube. Perhaps someone forgot to push it all the way back in before you started working?

author: @rt
author_rank: Super Contributor
timestamp: August 01, 2019, 11:22:27 am
content: I only know them briefly from Dave’s channel. At home I’ve got a cheap eBay one, but I think this one was all optical. It has a power cable, but also has lights so needs power.

author: BillB
author_rank: Unknown
timestamp: August 01, 2019, 04:17:20 pm
content: If it was a trinocular scope, and the camera lever was pulled, it would be really obvious. You wouldn't be able to see out of one eye piece at all. If you were able to see something occasionally from both eyepieces, then it was probably just an eyepiece adjustment/distance problem.If you aren't used to working with them, head position relative to the eyepieces can be a little tricky until you've built up the muscle memory. Good posture is important - I try to think of it as looking down rather than out. Another factor is if you were glasses or not. As a glasses wearer, I find it's best to fold back the rubber eyecup so my glasses are about .25" from the lenses. You'll definitely need to ensure the interpupillary distance of the eyepieces is set properly as well.

author: jmelson
author_rank: Super Contributor
timestamp: August 01, 2019, 07:41:37 pm
content: There'a another adjustment, sometimes on both eyepieces, sometimes only on one. It varies the diopter between the two. I prefer to work without my glasses, you get a much wider field of view without them. But, then the eyepieces have to be adjusted for the difference between your eyes, which is HUGE in my case.Jon

author: rsjsouza
author_rank: Super Contributor
timestamp: August 02, 2019, 01:38:17 am
content: Years ago I used to have this problem as well, and it is due to muscle memory and position of your head (if the model does not have the trinocular lever mentioned by others). It took me a bit to set my head a bit away to give the eyes the proper focal distance, as well as set the eye separation correctly. One additional detail was to set the diopter in the ocular (to compensate for the differences in each eye).

author: jfiresto
author_rank: Frequent Contributor
timestamp: August 02, 2019, 09:31:50 am
content: Quote from: jmelson on August 01, 2019, 07:41:37 pmThat is true of older eyepieces designed before the early to mid-1980s. More modern, "high eyepoint" eyepieces give the full field of view, even with glasses, to match a pair of fully corrected eyeballs to a fully corrected microscope.