Our microscope resources invite students to share in the sense of wonder that scientists have felt for centuries looking through the microscope. We look at the diversity of objects on the microscopic scale and introduce several New Zealand scientists who use microscopes to explore the things that interest them. At the same time, we show how microscopes themselves have evolved to look more and more closely at the world around us.

Microscopes are the tools that allow us to look more closely at objects, seeing beyond what is visible with the naked eye. Without them, we would have no idea about the existence of cells or how plants breathe or how rocks change over time. Our understanding of the world around us would be severely limited – and this is why many scientists see microscopes as the most important scientific instrument there is.

New Zealanders are only too aware of how devastating a major earthquake can be. Professor Dave Prior and his group are looking for clues to how and why earthquakes happen. In the article Squishy rocks and earthquakes and the interactive From mountains to microscopes, follow Dave and the team as they collect rock samples from deep in the Alpine Fault (Westland) and see how microscopy of rocks can shed light on the history of movement in the fault.

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Norland Optical Adhesive 72. PDF document icon Norland Optical Adhesive 72.pdf — PDF document, 57 KB (59210 bytes). © University of Louisville.

These ranges are uncoated, however, antireflective coatings can be applied at short notice. Please note that due to the small size of the fresnel lens on part ...

Fresnel Effect

Dr Rebecca Campbell (University of Otago) discusses the importance of fluorescent molecules in confocal laser scanning fluorescence microscopy (‘confocal microscopy’) of cells. She explains how green fluorescent protein (GFP) from jellyfish can be used to make specific neurons glow green.

Ailipu Technology, with its own brand ELP , presents new web USB cameras module range from 30W Pixel, 1megapixel, 2megapixe, 3megapixel, 5 megapixel to ...

The Exploring with microscopes – question bank provides a list of questions about microscopy and places where their answers can be found. The questions support an inquiry approach.

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Dr Rebecca Campbell is studying a small group of brain cells (GnRH neurons) that control fertility. Learn about her remarkable discoveries about how these cells interconnect – all done using microscopes of course!

This SEM image of tin spheres of various sizes (used to calibrate the microscope) was taken by Liz Girvan. It won an image competition in Otago and has attracted worldwide interest.

We live in a beautiful world – and that beauty and complexity extends far beyond what humans can see unaided. From plant and animal anatomy to cells and proteins and even down to the level of atoms, there are worlds within worlds of detail to be explored on the microscopic scale.

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The image formed in simple microscope is virtual and upright where in compound microscope, the image formed is virtual and inverted.

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Associate Professor Tony Poole shares his story about the primary cilium, a structure of the surface of cells that seems to monitor what’s going on in the cell surroundings. This elusive structure was first tracked down using microscopes, and many aspects of how it works remain mysterious. In the article A closer look at the cell’s antenna, see how Tony is using microscopes to build a 3D computer model of the primary cilium.

Other articles where barrel distortion is discussed: aberration: …be present in a lens: barrel distortion, in which magnification decreases with distance ...

Fresnellens

The most important part of a lighthouse might be one of the beautiful tools hidden inside of it: the Fresnel lens, a breakthrough that changed seafaring and saved lives.

The student activities provide plenty of hands-on experiences. Modelling animal cells in 3D imitates what can be seen under high-resolution microscopes. Using lolly slices to build 3D images and Using shadows to build 3D images model how scientists interpret microscopic data. Ferns under the microscope demonstrates how increasing the power of magnification leads to much greater detail. For younger students use the Making a simple microscope activity – it uses accessible technology to increase students’ ability to observe closely.

Dr Bronwyn Lowe describes her use of scanning electron microscopy (SEM) to explore harakeke leaves. Bronwyn found that different harakeke varieties have differently patterned waxes on the leaf surface. She also explored the distribution of fibre (muka) in the leaves of different varieties.

Micro Prism is a precise small prism made of optical glass. It can be used as a prism for optical communication and optical equipment. Surface coatings, such as ...

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Fresnel lenses are still in operation today. According to the US Lighthouse Society, more than 75 Fresnel lenses are in use in American lighthouses, and businesses such as Dan Spinella’s Artworks Florida craft replicas that capture the beauty — and functionality — of the 19th-century breakthrough.

As the above video shows, these lenses satisfied a need for lighthouses that could shine farther and through dense layers of fog. The Fresnel lens, invented by Augustin-Jean Fresnel, helped do that by capturing all the light coming from a lamp, then magnifying and steering it in one direction. Suddenly, lighthouses became more useful and shipwrecks diminished.

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Our microscope resources emphasise the link between microscope technology and the science that microscopes have helped uncover. The activity Which microscope is best? is a good starting point for learning how specialised microscopes can help answer different scientific questions.

Using the earliest microscopes, scientists glimpsed a world of unimaginable complexity – and they wanted to know more. To satisfy this urge, microscope technology became more sophisticated over time, letting us look more and more closely at objects. We’ve been able to ask more specific questions about the object we’re viewing: What does its surface or internal structure look like? What is it made up of? How does it change over time? For each of these questions, specialised microscopes have now been developed that can provide the answers.

Micro-Sphere Ball Lenses are provided for three wavelength ranges and different focal lengths, with an AR coating or uncoated.

A waveplate or retarder is an optical device that alters the polarization state of a light wave travelling through it. ... Linearly polarized light entering a ...

Collimated beams are light rays that are parallel to each other, maintaining their direction and minimizing divergence over distance.

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At the University of Otago, Dr Bronwyn Lowe and Māori weavers have been working closely together to explore several properties of harakeke (New Zealand flax). In the article Harakeke under the microscope, learn about the differences between harakeke varieties on the microscopic scale and explore how mātauranga Māori (traditional Māori knowledge) can shed light on scientific research.