Microscopes Definition and 31 Threads

Some resources mention about eyepiece lenses for human-eye microscopes (not digital ones). Also some sources says that removing the lens from the camera module of raspberry pi and combine it with a objective lens such as TREEYE 15.3 mm is enough to create optical system for microscope. What is...

I tried deriving the angular magnification of eyepiece & this is what I got. ## m_\theta = \frac {h}{u} * \frac {D} {h} ## Taking v as ##f_0 + L## from the diagram, I calculated u. ## m_\theta = - \frac{DL} {f_0 (f_0 +L)}## Please verify my calculations and kindly point out my mistakes.

I am looking for a cheap, dissecting microscope with which to take photos of bugs and tiny flowers. I've seen digital scopes for electronics repair but don't know if they have any depth of field. Any advice? Thanks.

Is it possible to design & construct a Microscope (optical or Electron) which can take multiple slides samples instead of a single sample slide at a time?. Possible construction of the Sample Slides target is a circular disc holding say 5-10 sample slides. The Circular disc can be rotated...

angular magnification=9.62 part a 1/s+1/s'=5 1/(25-s-s')+1/s"=1/2.6 -s"/s=m can't find m, don't know how to use the info that a person of normal eyesight is looking into the microscope.

Hey everyone, Microworlds here, I wanted to make myself available as a resource in the chemistry department for anyone looking for troubleshooting or information relating to the microscopes they use. I have read the posting guidelines and will focus on posting resources and helpful...

Homework Statement - Why is it more useful to mark an objective lens [in a microscope] by its magnification rather than focal length? - Why might it be more convenient to think in terms of refractive power rather than focal length? [dealing with vision here] Homework Equations - thin lens...

Homework Statement Why? We can use shorter wavelengths than that of electrons to view electrons and more? What is stopping us? Can the image not be imprinted on a plate of some sort instead of being viewed by the eye directly? Homework Equations none The Attempt at a Solution I'm guessing no...

I have very strong astigmatism, for a 17-year-old. I wear toric contacts, which is supposed to help people with astigmatism. I take a college biology class and today we were looking into light microscopes. I have always struggled with looking in microscopes, but today felt so much worse. After...

I have a few questions regarding an optical microscope and their white light sources... So white light generally first hits a diffuser, some kind of ground glass lens. What is the purpose of this? Then the light goes through a field diaphragm, which we can open and close. I have heard that...

I need to write a conclusion for a presentation I'm doing on "Seeing the infinitely small" (translation from french), which is basically about microscopes and the LHC, how to observe the different levels of small and all that... What can I write to answer, "why are we trying to observe the...

My question is simple: Why do the Fresnel fringes at the edge of a hole in a reticulated carbon film become larger and more widely spaced when the defocus is increased? This occurs whether you are over focused or under focused, right? But why?

I stumbled across this. http://www.innovatoys.com/tech-gadgets/usb-eyepiece-for-microscopes/5937 I've got a 6" reflector on an equatorial mount. At some angles, an hour of viewing could put me in a chiropractor's office. It would be cool to observe the sky from a sitting position that didn't...

Is there any usage for a measuring microscope in an electricity laboratory as a part of any experiment? We have a Mitutoyo measuring microscope in our fundamental electricity physics lab which is a course for sophomores. We used it for apparent depth in our optics lab which is retired now! I'm...

I really want one but I'm not sure what to look for. I have lots of experience on normal compound and Nikon inverted compound scope for eukaryotic cell culture but I'm obviously not going to buy one of those for my house. It'd be nice If I could use a camera with it too. I don't want to have it...

I read that in terrestrial telescope there is an erecting lens whose function is to erect the inverted image formed by objective lens so that final image formed by eyepiece is also erect.there is no need of erecting lens in astronomical telescope because astronomical bodies are symmetrical in...

The Nature article http://www.nature.com/news/microscopy-hasten-high-resolution-1.16393 talks about the importance of the higher resolution microscopes: "Build precision microscopes to map atoms", and "To truly understand materials' chemical and physical properties, atomic arrangements need to...

I see the term o"ptical frequency" in some articles. From Wikipedia I read that it means the whole EM spectrum. But something says to me it may be only the visible part of the spectrum. Now, which definition is correct? Thanks

I have two lenses for my microscope. The object lens which magnifies 63 X. Then there is my eyepiece lens with f=100 mm which focuses the incoming light at an camera. How can I calculate the total magnification? All calculations so far for the eyepiece involve the 25 cm of the human eye, but now...

Dear friends I have been working on a new way of illuminating microscope specimens. Cannot disclose the innings of it since all is under development. Nevertheless I attach photo since I think you will find it interesting. That is the mouth of a honey Bee, photo compares standard bright-field...

Hi all, I've been reading about biconvex lenses, drawing ray diagrams and real/virtual images. I'm now trying to translate this into how an image is formed in a compound infinity optics microscope. And this has raised some questions: -In an infinity optical system the object is placed at a...

Hi awesome people at physicsforum, I'm interested in understanding light and optics such that i can understand the basics behind the different types of microscopes (phase-contrast, light microscope, electron emmision etc.). I'm not so interested in the math and calculations, more in the...

An infinity corrected microscope objective has a magnification of 100× for a tube lens with focal length 180 mm. The numerical aperture of the objective is 0.90. Calculate the the diffraction limited spatial resolution if the objective is used with red light (660 nm). (Ans.: f=1.8 mm; d=447...

I performed a simple experiment to find the focal length of a magnifying glass. Taking a white sheet of paper as a screen and a building as object at infinity, i got a clear image at 12.5 cm, which is approximately the focal length of the lens. Plugging this into the formula for magnifying power...

Why in telescopes and microscopes the ocular distance is such that it creates virtual images instead of real images?

Homework Statement The highest achievable resolving power of a microscope is limited only by the wavelength used; that is, the smallest item that can be distinguished has dimensions about equal to the wavelength. Suppose one wishes to "see" inside an atom. Assuming the atom to have a diameter...

This may be a bit of a silly question, but I'm wondering if it is feasible to design a freshman level lab experiment using a STM? For example, let's say the lab is simply intended to give the students a better appreciation of how a STM operates within the framework of quantum mechanics, with the...

can a light microscope with 1000x magnification see clearly a unicellular organism moving around and feeding and stuff like that. And if not would u need an electron microscope?

Ok, so I'm going to be using microscopes a fair amount this summer and autumn. Last time I was using them on a regular basis, the sight in the eye I was using became worse and I began to have trouble focusing when I wasn't using the scope (though it seems to have recovered since). Has this...

[b]1. A compound microscope has the objective and eyepiece mounted in a tube that is 18.0 cm long. The focal length of the eyepiece is 2.24 cm, and the near-point distance of the person using the microscope is 25.0 cm. If the person can view the image produced by the microscope with a completely...

if the reason electron microscopes work so effectively is because of the electrons small wavelength, why not use a proton (or neutron) microscope instead? a proton's wavelength is about 10,000 times smaller than an electrons...