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If you use microscopes within a shared facility, then cleanliness and hygiene should be important factors. If you have any sort of eye infection, then you should refrain from using shared microscopes until this has cleared up. Many eye infections are highly contagious, so don’t go spreading them around your lab! After using a shared microscope you should also wipe clean the eyepieces and cup (as well as the other cleaning of the microscope before you finish). I’ve nothing against mascara and eyeliner, but some people really don’t suit it!

New observations from the James Webb Space Telescope (JWST) have confirmed a decades-old galaxy model, originally proposed by a University of Portsmouth Professor in 2005.

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Jul 27, 2023 — The compound microscope provides excellent resolution, allowing for detailed observation of bacterial structures. Phase-Contrast Microscope. The ...

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NASA's TBIRD (TeraByte InfraRed Delivery) demonstration and its host spacecraft—the PTD-3 (Pathfinder Technology Demonstrator-3)—have completed their technology demonstration. The TBIRD payload spent the past two years ...

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In the fight against antibiotic resistance, a new technology developed at Chalmers University of Technology, in Sweden, can be of great importance when, for example, hip and knee implants are surgically inserted. By heating ...

Researchers at Durham University, in collaboration with international partners, have developed a robotic system that allows for continuous, long-term observation of honeybee colonies.

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NASA's SPHEREx mission won't be the first space telescope to observe hundreds of millions of stars and galaxies when it launches no later than April 2025, but it will be the first to observe them in 102 colors.

Although the modern microscope is an array of optics, mirrors and lenses, in general, there are only two set of optics which are adjusted and changed by the user when viewing samples- the eyepieces and the objectives.

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For optimal viewing and imaging of specimens down the microscope, the eyepieces and objectives must work harmoniously with each other. Microscope manufacturers design these optical components to work together, so this is something to bear in mind if you are changing eyepieces or objectives between instruments. If you are buying an ‘off-the-shelf’ instrument, then the optics fitted will be designed and matched in such a way as to complement each other. If, on the other hand, you are building your own research grade instrument, then the choice of objectives will ultimately determine the matching eyepieces and vice versa.

NASA's LCOT (Low-Cost Optical Terminal), a ground station made of modified commercial hardware, has transmitted its first laser communications uplink to the TBIRD (TeraByte Infrared Delivery), a tissue box-sized payload formerly ...

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Lenses are essentially light-controlling elements and so are exploited for light gathering and image formation. Curved mirrors (see Optical Mirror Physics) and ...

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Observing our planet from the International Space Station since July 2022, NASA's EMIT (Earth Surface Mineral Dust Source Investigation) mission is beginning its next act.

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Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).

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Mar 16, 2020 — The high-powered objective lens (also called high dry lens) is ideal for observing fine details within a specimen sample. The total ...

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Astronomers have published a gigantic infrared map of the Milky Way containing more than 1.5 billion objects―the most detailed one ever made. Using the European Southern Observatory's VISTA telescope, the team monitored ...

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A simple refracting telescope may be constructed from a pair of convex lenses, where the larger of the two lenses is the objective. This lens produces a ...

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The next step is to make the diopter adjustment. If you have a look at the two eyepieces in a binocular set-up, then you’ll see that one of them has a ring adjuster around the eyepiece tube. Firstly, look at your specimen with the fixed eyepiece only. Adjust the focus of the specimen using the focus on the microscope body. Without adjusting the microscope focus, look down the adjustable eyepiece and slowly turn the diopter ring until your specimen comes into sharp focus. Once this is set, then this adjustment stays the same no matter which objective you use (unlike Kohler Illumination which I’ll cover in a future article).

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Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.

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The eyepieces (also known as ‘ocular lenses’ or ‘oculars’) are where the final image of your specimen ends up and is viewed. The eyepieces add a final additional magnification factor on top of that from the chosen objective (this is typically a 10X magnification). Eyepieces may look like relatively simple components of the microscope- indeed, some are simply a metal tube with lenses top and bottom, but in reality (and in many research grade microscopes) these tubes contain groups of lenses which work together to give a corrected view of your specimen as well as complimenting the optical set-up and properties of the objectives.

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Whether the eyepieces are made up of two or more lenses, the only visible lenses are at either end of the eyepiece. The lenses closest to your eyes are known as the ‘Eye Lens’, whilst those which face into the body of the microscope are known as the ‘Field Lens’.

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Jul 5, 2020 — While optical distortion is caused by the optical design of lenses (and is therefore often called lens distortion), perspective distortion ...

The eye lenses are usually surrounded by rubber eyecups. These serve two purposes- if you wear glasses, then these allow you to view your specimens down the microscope without bumping or damaging your glasses on the metal body of the eyepiece. Secondly, they block out some of the ambient light giving you a clearer view of what’s on the stage. They can be rolled back or removed if you would prefer not to use them.

Adjusting eyepieces to suit your vision is a relatively simple step. This is known as ‘diopter adjustment’ and is used to adjust the focus and vision differences between eyes which many people have (unless you have perfect normal visual acuity or ‘20/20 vision’). The first simple step is to adjust the distance between the eyepieces to suit the anatomy of your own head. The eyepieces on a binocular set-up are sometimes mounted on a horizontal ‘slider’ and can be moved to suit the distance between the eyes. Alternatively, these may be mounted in separate housing which can be revolved.

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