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Display Technology


Choosing a Stereo Microscope that’s right for you A


stereo microscope is an essential tool for a variety of different test, assembly and quality control stages within any manufacturing process. Selecting the wrong equipment can have a detrimental impact on the quality or accuracy of production, but, the right microscope will have a staggering impact on improving operator precision and workplace efficiency. Before any choice is made, a user must firstly consider the task at hand. Different microscopes are better suited for some tasks than others. These will differ across applications in electronics, precision metal, plastics, ceramics, rubber engineering, medical and dental device manufacturing, aerospace, automotive engineering, biomedical laboratories, forensic science, and even hair transplants or jewellery and restoration projects. Our buying guide breaks down the important factors to consider when choosing a stereo microscope.


Magnification


Depending on the task, a user must consider the magnification they will require – anything from 2x-100x is common. In some instances a range of up to 300x magnification is required.


Working distance


When working with tools it is important to consider the space required to access the subject with those tools. Working distance is linked to magnification and the microscopes objective lens. Typically, higher magnification objectives produce a shorter working distance. However, by effectively selecting the optimal components of objective, zoom and other factors, a suitable configuration can be achieved.


Illumination All stereo microscopes require light. Various illumination techniques are available, but most stereo microscopes rely on reflected light. If you are looking to invest in this sort of microscope you must ensure you acquire a suitable illuminator, often this is in the form of a ring light. In some cases, such as the inspection of transparent materials, the addition of a sub-stage light


retaining the stereoscopic view. Eyepiece- less versions offer a substantially larger exit pupil, up to 30mm, allowing the user to move up and down and from side to side for comfort without compromising the view. By moving users are also able to change their perspective slightly giving an enhanced 3D understanding of the subject. This also makes for easier hands- free operation in applications, such as soldering or layer removal, where frequent subject manipulation is needed. With the eyepiece-less design, users do not need to remove prescription glasses and safety glasses, as they do not need to have their eyes up against the eyepieces.


Digital imaging and viewing options


Advances in digital technology have had an impact on the development of microscopes with some microscopes including accessories that allow you to attach a camera whereas others are pre- equipped with integrated cameras. Whilst the traditional stereo


microscopes are still a fundamental 14 February 2020 Components in Electronics


requirement for countless inspection tasks many users are taking advantage of digital advances and adding are this element to their microscopy requirement. Operators may simply want to view samples on a screen or there may be a need to capture images of the samples or parts. The live-recording of a process or image


capture of a particular component or sample offers the ability to share results with others for discussion or the option to document the task or subject for compliance purposes. This technology has now advanced to the point where a 3D image with exceptional clarity and depth perception can be shared on in real-time across multiple sites, providing operators are using the same viewing equipment.


User


Exactly how the microscope will be used should have an impact on your choice of design. Frequent users of conventional binocular microscopes are more at risk of back pain and discomfort as a result of leaning over upward facing eyepieces. Similarly, long-duration users might notice


is extremely useful. UV illumination is also available for use where subjects fluoresce under UV light.


Stereo Viewing Variations The conventional stereoscopic microscope typically features eyepieces with a 3.5mm exit pupil. This is the tiny, circular area of light that the microscope presents to users’ eyes. In order to properly see the subject, users must precisely align their eyes with the eyepieces. Not only is this tricky, but the user is forced to maintain a fixed body posture, potentially causing physical discomfort over any extended period of time. Fortunately, some modern designs do- away with traditional dual-eyepieces while


considerable eye strain, fatigue or loss of performance when using a microscope with conventional eyepieces. An alternative to this, is to invest in an ergonomic microscope which allows the user to sit back from the viewing lens and inspect samples and components from an upright, natural position. This more natural posture also contributes to improved hand- eye coordination and reduces eyestrain.


Working environment When considering microscope options it is beneficial to assess the working environment and the way in the microscope will be integrated into a workstation so that a suitable stand or mount can be included in the microscope purchase. A bench stand offers a small footprint whilst boom stands are widely used in industrial applications, allowing users to mount the microscope directly to a desk or large workstation.


An articulated arm mount suits


environments where users may need to occasionally swing the microscope away from the workspace. As an alternative, some universal stands combine various benefits of all these stand types.


Budget Effective and useful equipment is a good investment, and one should also consider future needs. Some microscopes offer modularity for future upgrades, so making a wise investment early on can be more cost effective in the longer term.


Contact the experts At Vision Engineering, experts are on hand to guide you through your choice, weighing up your options and offering sound, unbiased advice as to what microscope will fit your needs best, based on all of the above specifications and more. It is highly recommended that any manager, worker or supplier consults the advice of an expert who will help you make the best possible choice in keeping workers happier, healthier and more productive.


visioneng.com www.cieonline.co.uk


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