There are some important specifications and terminology you’ll want to be aware of when designing a microscope or ordering microscope objectives. Here is a list of key terminology.

A reflective objective works by reflecting light rather than bending it. Primary and secondary mirror systems both magnify and relay the image of the object being studied. While reflective objectives are not as widely used as refractive objectives, they offer many benefits. They can work deeper in the UV or IR spectral regions, and they are not plagued with the same aberrations as refractive objectives. As a result, they tend to offer better resolving power.

Numerical aperture NA denotes the light acceptance angle. Where θ is the maximum 1/2 acceptance ray angle of the objective and n is the index of refraction of the immersive medium, the NA can be denoted by

UV glue doesn’t stick to plastic very well. Tried to glue the shells of an old kitchen timer together and it didn’t last. I think superglue or epoxy is the better choice for those posts.

The actual range of resolvable frequencies of a smaller aperture is in proportion to the aperture reduction factor. In terms of MTF, CTF is given as CTF=(4/π)[ ...

I’ve done maybe 5-6 of these using just superglue and the steel powder. Four held (as far as I know) as long as the user was careful. One needed the full JB fix after it failed. But after that there is no going back as it’s a permanent fix with no way to take it apart… I’ve done a few where I drilled through the case and used a screw and bolt. Very steampunk.

Nowadays, I use Surehold Helios UV glue from Amazon. It comes in a black bottle that reliably keeps the glue liquid for many months after opening. And unlike with Fiberfix, every batch I’ve gotten from Amazon came liquid out-of-the-box.

Uv glue and lightfor plastic

While a magnifying glass consists of just one lens element and can magnify any element placed within its focal length, a compound lens, by definition, contains multiple lens elements. A relay lens system is used to convey the image of the object to the eye or, in some cases, to camera and video sensors.

A basic achromatic objective is a refractive objective that consists of just an achromatic lens and a meniscus lens, mounted within appropriate housing. The design is meant to limit the effects of chromatic and spherical aberration  as they bring two wavelengths of light to focus in the same plane. Plan Apochromat objectives can be much more complex with up to fifteen elements. They can be quite expensive, as would be expected from their complexity.

It’s my go-to glue for any project where I don’t want to spend a lot of time waiting for cures. And it even works where the UV light cannot reach all the glue, since exposed glue will dry within a couple hours just like exposed super glue.

One sneaky trick for precision work is to put a leur-lok dispensing needle on the end of a “taper tip” static mixer nozzle.

In modern microscopes, neither the eyepiece nor the microscope objective is a simple lens. Instead, a combination of carefully chosen optical components work together to create a high quality magnified image. A basic compound microscope can magnify up to about 1000x. If you need higher magnification, you may wish to use an electron microscope, which can magnify up to a million times.

The working distance of a microscope is defined as the free distance between the objective lens and the object being studied. Low magnification objective lenses have a long working distance.

Mar 28, 2022 — 8-32 to metric ... The m4 is smaller than an 8-32, so M5 would be what you would have to go to . You may need to drill for tap drill size for the ...

Details. The Bausch & Lomb Hastings Triplet Magnifier: 10X Power is an expertly designed magnifier commonly used in various industries for detailed inspection ...

My dentist uses VU hardening stuff on my teeth, so at least some of it is plenty tough. And the Youtube commercials show the stuff working magic. Right next to the 900,000 Lumen 18650 Zoomies.

Once you use the pen and then apply the glue, usually the plastic will break before the glue detaches. The activator pen is awesome! [/quote]

Hopefully some forum members will have experiences to share about UV curing glues, including their techniques for controlling the mess from glue squeeze-out and dripping when the parts coated with glue are initially pressed together.

It does seem to have……some……useful applications. Not nearly as good a glue as epoxy or JB Weld, but it does cure almost immediately which those glues do not.

Both the objective lens and the eyepiece also contribute to the overall magnification of the system. If an objective lens magnifies the object by 10x and the eyepiece by 2x, the microscope will magnify the object by 20. If the microscope lens magnifies the object by 10x and the eyepiece by 10x, the microscope will magnify the object by 100x. This multiplicative relationship is the key to the power of microscopes, and the prime reason they perform so much better than simply magnifying glasses.

Eyepiece Tube holds the eyepieces in place above the objective lens. Binocular microscope heads typically incorporate a diopter adjustment ring that allows for ...

Once you use the pen and then apply the glue, usually the plastic will break before the glue detaches. The activator pen is awesome!

If you knew what type of plastic it is solvent bonding might be an option. I used this method to build an enclosure for a pd trigger board for a cable to power a small 12v portable tv using a 30000mAh power brick. I couldn’t find a plastic enclosure the right length so I cut two down to give me the proper length. A little sanding on the cut ends of the boxes and lids for a nice tight seam, a drop of acetone from a glass eyedropper, a little brushing across the seam with an acid brush and I had a nice strong joint.

I do this mostly for grins as the cost in labor is usually more than the laptop is worth. As the super slim designs become the norm, repairs are getting harder for small shops to do. And don’t get me started on Apple products…. All the a Best, Jeff

Baking Soda soaks up the superglue quite well. It’s easier to use than the steel powder. I’ve used it if there is some of the original plastic left to bond to. Useful for other stuff too. But the resultant solid is not as sturdy as using powdered steel dust (at least I’ve convinced myself of that) . These crappy little mounting posts are subject to both compression, shear, and extension stress. JB putty would work great, but it doesn’t stick to plastic as well as regular JB or superglue.

To use the pen simply draw on both surfaces to be glued with it, then wait one minute. After that, apply ANY super glue, including these UV cyanaocrylate glues. In my experience, the pen makes any cyanocrylate adhesive bind to any plastic, including rubber.

The light has to reach the UV glue, so bonding opaque surfaces don’t work. I’m sure, just like all glues, there is a wide variation in quality. I have a ‘cheap Chinese’ small kit, brand name [Visbella]; glue and a small UV light. Some things it worked a treat for, due to the ability to ‘freeze’ the glue quickly. Some things it didn’t stick to very well at all. Doesn’t do too well with plastic….little does.

A basic compound microscope could consist of just two elements acting in relay, the objective and the eyepiece. The objective relays a real image to the eyepiece, while magnifying that image anywhere from 4-100x.  The eyepiece magnifies the real image received typically by another 10x, and conveys a virtual image to the sensor.

Uv glue and lightnear me

There are two major specifications for a microscope: the magnification power and the resolution. The magnification tells us how much larger the image is made to appear. The resolution tells us how far away two points must be to  be distinguishable. The smaller the resolution, the larger the resolving power of the microscope. The highest resolution you can get with a light microscope is 0.2 microns (0.2 microns), but this depends on the quality of both the objective and eyepiece.

Although today’s microscopes are usually far more powerful than the microscopes used historically, they are used for much the same purpose: viewing objects that would otherwise be indiscernible to the human eye.  Here we’ll start with a basic compound microscope and go on to explore the components and function of larger more complex microscopes. We’ll also take an in-depth look at one of the key parts of a microscope, the objective lens.

Most microscopes rely on background illumination such as daylight or a lightbulb rather than a dedicated light source. In brightfield illumination (also known as Koehler illumination), two convex lenses, a collector lens and a condenser lens,  are placed so as to saturate the specimen with external light admitted into the microscope from behind. This provides a bright, even, steady light throughout the system.

Dell, in it’s wisdom, peens over the threads on the hinge pin. Making nearly impossible to disassemble without taking the whole frigging thing apart. And don’t get me started on cable routing through the hinge area.

UV Light gluefor glass

Experience unmatched depth and detail on every ride, spotting every contour and texture before you. Vividvis lens technology and light filtering ...

One other tip: Cyanoacrylate adhesives, including super glue and these UV activated cyanacrylate glues do not bond well to most plastics.

While most microscope objectives are designed to work with air between the objective and cover glass, objectives lenses designed for higher NA and greater magnification sometimes use an alternate immersion medium. For instance, a typical oil immersion object is meant to be used with an oil with refractive index of 1.51.

UV Gluefor acrylic

I still like UV cyanoacrylate glue though since I can use it like super-glue and with the added benefit of curing in less than 10 seconds with UV light when needed. However, I no longer use Fiberfix due to the aforementioned issues.

The optical performance of an objective is dependent largely on the optical aberration correction, and these corrections are also central to image quality and measurement accuracy. Objective lenses are classified as achromat, plan achromat, plan semi apochromat, plan apochromat, and super apochromat depending on the degree of correction.

Refractive objectives are so-called because the elements bend or refract light as it passes through the system. They are well suited to machine vision applications, as they can provide high resolution imaging of very small objects or ultra fine details. Each element within a refractive element is typically coated with an anti-reflective coating.

I got this one as a left behind when I setup a new system for the user. It’s a nice laptop, and I decided to give it a go. There was enough plastic left that I built up the mounting areas with superglue and powdered steel dust. Then used the OEM mounting hardware and screws. Sort of an instant JB weld job. It’s holding so far. If it goes again, the full JB treatment, (or bolts through the case) are the last resort.

I just glued the plastic hinges on my Samsung lap top. Used crazy glue and baking soda. I had to limit the build up because of clearance issues but seems to be holding well so far KOW.

The parfocal length of a microscope is defined as the distance between the object being studied and the objective mounting plane.

Dell isn’t the only company that has great ideas. There are some Toshiba laptops that are great PCs. I’m typing on one now. If the keyboard goes, the replacement is relatively expensive as laptop keyboards go. BUT, it’s attached to the top clam shell with plastic studs melted into the mounting holes on the keyboard. So to remove the old one, you melt the studs with an iron. Shape them us as best you can so the new KB will fit. Then hope you have enough plastic to work with to secure the new KB. Or try superglue and baking soda How do you quote a repair like that? Well, if it works, it will be 2 hours in labor plus parts. But it might not work. And I won’t know if it works till after I’m done.

The package comes with a tube of super glue, and a plastic activator pen. Feel free to use or discard the glue. It’s basically just regular super glue. What you want is the activator pen.

Bestuv glue and light

Once the joint starts to go, unless the user takes remedial action quickly, the little posts crumble and you’re are left with the little brass inserts unsupported by anything other than the surrounding components. This user had the screen duct taped together to keep it from coming apart. The hinge was forcing the screen to pry itself asunder. On this particular laptop the hing actually has a component that floats unsupported and acts as a lever to the hinge mounting points. I made a support to brace it from below so it doesn’t have a chance to flex as much. Popsicle stick shaved thinner and cut to shape did the trick.

First UV glue I tried was Norland N0A61. Bought it specifically to glue lenses into bezels. Unfortunately, the UV light had was no good. I found the best way to cure it was to leave it outside in the sun for an afternoon. Even then, the glue never seemed that strong. It definitely wasn’t a replacement for super-glue for regular hobby projects.

How tough is this stuff? Can it support stress? How’s it bond to plastic and brass? If it is structurally up to the task, seems like it would be a good product to rebuild plastic structural components. Less mess than superglue, it would seem. What’s your experience? Thanks, All the Best, Jeff

The eyepiece or ocular lens is the part of the microscope closest to your eye when you bend over to look at a specimen. An eyepiece usually consists of two lenses: a field lens and an eye lens. If a larger field of view is required, a more complex eyepiece  that increases the field of view can be used instead.

UV GluePen

Duct tape for the lid hinge? I have a Lenovo ultralight that I replaced the battery. Battery was a thin ‘plate’ the size of the whole bottom. Broke damn near ALL the stupid little plastic clips getting the bottom off. Now held on with electrical tape. Pissed, but good enough. Jeez I miss simple little screws holding things together.

Does anybody have any experience with this stuff? I just finished a hinge rebuild on a Dell laptop. Due to poor design, the plastic posts that the hinge screw inserts are – err inserted in - start to flex and disintegrate. They like to claim it’s user abuse – even if the web if full of the same model with the same problem. Dell, if properly bullied, will replace the laptop under warranty with a referb. Since basically the case needs replacement. When the same thing happens to the referb, well warranty is over, so you are SOL.

A microscope is an optical device designed to magnify the image of an object, enabling details indiscernible to the human eye to be differentiated. A microscope may project the image onto the human eye or onto a camera or video device.

The package comes with a tube of super glue, and a plastic activator pen. Feel free to use or discard the glue. It’s basically just regular super glue. What you want is the activator pen.

At Avantier we produce high quality microscope objectives lenses, ocular lenses, and other imaging systems. We are also able to provide custom designed optical lenses as needed. Chromatic focus shift, working distance, image quality, lens mount, field of view, and antireflective coatings are just a few of the parameters we can work with to create an ideal objective for your application. Contact us today to learn more about how we can help you meet your goals.

Jan 3, 2014 — A "circular" polarizer is simply a linear polarizer that has a quarter-wave plate on the backside of it. This means that only the light matching ...

The TLC also announced that TLC drivers that had long term lease-to-own arrangements before the initial August 2018 TLC Plate Cap announcment, ...

UV Glue and lightKit

The field of view (FOV) of a microscope is simply the area of the object that can be imaged at any given time. For an infinity-corrected objective, this will be determined by the objective magnification and focal length of the tube lens. Where a camera is used the FOV  also depends on sensor size.

After putting this one together like 5 times, I finally got it fit together correctly… Fired it up today with an new SSD installed for a new OS install. Screen had fingerprints n it. Wiped it down. Still there. On the inside of the touch screen glass… Well crap, I gotta take it apart again. But not for a while. I’ve got way too much time on this one already.

Historically microscopes were simple devices composed of two elements. Like a magnifying glass today, they produced a larger image of an object placed within the field of view. Today, microscopes are usually complex assemblies that include an array of lenses, filters, polarizers, and beamsplitters. Illumination is arranged to provide enough light for a clear image, and sensors are used to ‘see’ the object.

To use the pen simply draw on both surfaces to be glued with it, then wait one minute. After that, apply ANY super glue, including these UV cyanaocrylate glues. In my experience, the pen makes any cyanocrylate adhesive bind to any plastic, including rubber.

From what I understand, the applications for UV cured glues are limited since unless you are just top-coating a surface to give it a hard finish, a requirement for bonding items is that at least one of the materials being joined must be very transparent like glass or clear plastic so that the UV light can penetrate to the mating surfaces and cure the glue.

I think the “glue” may be better…maybe. BUT, the little UV light with the kit doesn’t work well to kick it. Luckily I have a really strong UV light that does seem to work. Weird, you’d think any UV light “designed” for the glue would work.

An microscope objective  may be either reflective or refractive. It may also be either finite conjugate or infinite conjugate.

At any temperature, the metal is glowing in all colours at the same time, and infrared and ultraviolet and at wavelengths beyond both ends ...

A lot depends on how the mounting points are built. Some are hopeless and I go straight for the JB full goop repair. JB will hold as long as the surfaces are roughed up and cleaned really well. It ain’t never coming apart again.

The use of aspheric lenses allows an optical system to be made both smaller and lighter. An application that requires several spherical lenses can sometimes be ...

Uv glue and lighthome depot

When the small tube ran out I went Amazon shopping for replacement. Reviews are all over the place. Finally bought a bottle called [Damned Good UV Glue]. Yeah, that’s right.

Microscope objective lenses are typically the most complex part of a microscope.  Most microscopes will have three or four objectives lenses, mounted on a turntable for ease of use. A scanning objective lens will provide 4x magnification,  a low power magnification lens will provide magnification of 10x, and a high power objective offers 40x magnification. For high magnification, you will need to use oil immersion objectives. These can provide up to 50x, 60x, or 100x magnification and increase the resolving power of the microscope, but they cannot be used on live specimens.

There are three categories of glues; tacking, structural and sealing. You need a structural type glue to fix broken hinges. Super or cyanoacrylate glues are tacking glues and have no impact or flexing abilities regardless if some say they do. Two part epoxies either the 5 minute or regular varieties are much better for this type of application. UV epoxies are just an expensive option to the two part epoxies, they are are normally used in the electronics and dental industries where a form and instant set requirement is required, but the down side is that if the light is not intense enough it will not cure properly. Seen it many times in the electronics industry where UV epoxies ruined many expensive motherboards when the UV bulb decreases in intensity over time and the glue would not set properly and the product made it to the customer with a runny glue.

Spherical aberration (SA) is the only monochromatic aberration that is present on the optical axis. It is similar to axial chromatic in this regard as well as ...

yes, the one i had was very good, i bought a tube at home depot a while ago, it had a uv on the other end of the tube, and i can’t find it anymore, and i did use it for exact same purpose, in laptop repair, those broken posts with brass inserts, it was perfect for the task, no mess, almost instant bond, and strong hold.

Oddly enough, this Dell has a metal lid. Naturally the hinge is connected to a plastic internal part that is held to the lid with snap on grabber thingies….