🔬 How does a microscope objective look like in the inside?
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- Опубликовано: 16 июл 2024
- Here I take apart a 40x achromatic microscope objective. Why? Because I wanted to know how it is made.
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I do professional microscope service. Although it was very nice to show people all the little pieces in a typical objective I found myself saying, "not that way !" to the computer screen several times ! 1. the back piece which works as an aperture, SCREWS off, it doesn't pry off ! Usually, quite easily by just pushing it against a nice rubber surface and rotating. 2. The sets of 3 triangulating holes on the barrel are for the factory to center the lens elements. 3. DON'T use your calipers as a wrench. Aarrgg ! You will just bend up your calipers and potentially slip and damage the lenses. They do make nice lens tools for that job.
Otherwise, enjoy your informative videos. Most frequent reason to take apart an objective is to remove oil. Painstaking process to get the elements really perfectly clean afterwards. Sometimes can not be repaired due to damaged elements or a leaking seal at the front element. Probably about an 85 to 90 percent success rate. Often have to "play" with centering the elements several times to get the optimum image, so can also be very time consuming. However, If one is looking at several thousands of dollars to replace an objective it is often worth and time and expense of trying to repair it first !!
I enjoy your videos, keep educating people about microscopy, there is always more to learn !!
As you know, you can get this 40x objective for 10-15$ shipping include. They are awesome for the price!
We live in a strange world... Disposal shouldn't be cheaper than repair... But it is.
How much does the technician who worked on this objective (and other people in the factory) get paid per hours?
I'm so thankful to be the one who benefit this modern slavery and not the other way around... It's sad, I'm against it... But I'll still buy cheap stuff if the quality fit my needs.
Is it possible to get a bunch of the first lens that will fit theses cheap objective? Off course, at a dirt cheap price but comparable quality.
Me again! What will be your best way to get a better parfocal with our other objectives?
Just put a 3D printed spacer to avoid screwing the objective all the way in the scope?
I'm planning to do it with lower power objective 4x and 10x, and avoid touching 40x and 60x as much as possible.
Thank you Steven for sharing your expertise. I hope you will see my comments.
Alex from Montréal
Proud owner of a SWIFT380B since june 2024!!!
And former analytical instrumentation specialist.
They used to make different thickness spacers to use to adjust for parfocality. A quick way I will often use is to put a little latex caulk on the objective threads. I'll adjust the lens by screwing in to match the focus and then leave it to dry. It still easily unscrew for removal when necessary.
Good video. I would like to add that the plastic cover at the top of the objective can be easily screwed off instead of popping it out with a screwdriver. I do it a lot. Thanks for your informative videos
I think the multiple screw holes is so you can choose on that better suite you macroscope in making all objectives parfocal.
A calliper! Great idea. I can’t get mine off
thanks for sharing...I was thinking about opening my objective out of curiosity...
Opening/closing are the easy part! Getting the alignment perfect is the hard part.
Thank you for the very detailed video 💕✅
Gracias por tu trabajo
Thanks, it answered for my question: did I made a bad decision for unscrewing that little screw and rotating the internal part too much, that I even don't remember the last position of the rotation, where the screw was screwed :D
I was afraid that it was some kind of focusing regulation, but now I understand that it's just for the stability to prevent rotation.
Good knowledge gain about objective lens
Nice. I have 2 videos here on youtube where I am dissasembling Mitutoyo 10x NA0.28 and 20x NA0.42 objectives.
look at all the parts at 40x
My random thought early this morning: I wonder what a microscope lens looks like disassembled.... Thanks!
Yep, RUclips save a lot of money on people like you and me!
Respected Sir,
First of all thanking you for preparing such nice and knowledgeable video. I'm a research scholar and having my own microscope and related camera of Dewinter company and facing lots of fungal problems in all my lenses and also in the camera. I regularly cleaned it from lens cleaner and then all lenses were washed with absolute alcohol but with in two days this problem again occurred. One of my camera adaptor lens is damaged due to this cleaning processes and 1000x photographs shows lots of scratches in the photographs and poses lots of pressure in my mind because 1000x photographs are necessary for my research paper. So please suggest me how to protect lenses from the fungus.
Thanking You.
How did you break so many objective lens? Share your experience please, so that we don’t have to.
Anyone buying the excellent and still expensive objectives from the early 1900s that can be found on eBay would be advised that they used to employ "drunken threads" so that the elements could be aligned precisely on an optical bench with special equipment. It would be impossible to reassemble the objective without that equipment. Not a problem with the modern objectives here.
Newbe question:
When changing objectives for each magnification level, I need to fine focus about a quarter turn.
Going from X4 to X10 though, it takes a full turn. If I unscrew the X4 objective about 2 turns and use a gap gauge (0.3mm) I find that I only need to adjust a quarter turn like the others.
Do they make shim washers to correct this?
Not that I know of, but this can easily be corrected by using either plastic foil or thin cardboard (cut out with a sharp knife).
sir I'm planning to build a Galilean telescopes. now my question is . will it work as my eyepiece lens?
How to buy lense in amazon
Microscope repairing shop were having
So can i clean the inside of the one with the small hole with alcohol or should i also use dish soap?
No soap on optics. Alcohol evaporates, soap not.
Can i take it apart and use ultrasound clean clear them?
Sure, that's the easy part... The hard part is to align them properly after.
All the internal lens usually are clean. You only have to mess with the outside lens. I wish you the best. Take lot of picture, put pencil mark for futur adjustment. You can save it if you are very carefull.
But if it's a total loss, you can buy a new one for under 10-20$ (if you have the same as in this video).
I have a question does microscope lenses convex?
Both. They are many of them with various lenses shape and density. In this video, we only saw 3 lens, but in fact some are stick together.
sir and you make lap microscope into mobile repair microscope it will be hip
t
I need more information here. What is a mobile repair microscope? What should it do?
Sir
I hope to make a microscope from scratch. please help me to do it. I hope your reply
Find P.U.M.A. DIY 3D printed microscope. They have free stl. You can have very advance scope technology for super cheap.
You can have a decent printer for 200-300$ (like Ender3) And an awesome super fast one Bambulab under 1000$
That was my plan (I already own 2 printers). But latter, I've got a deal 145$us for a SWIFT380B, new open box. So I ditched the 3D project.