In the course of recent years I have had the one of a kind chance to talk straightforwardly with a large number of the experts and educators who utilize Overhead Projectors as a basic piece of their calling. Through these associations I have aggregated notes and data that has roused me to compose these articles that relate to probably the most widely recognized issues experienced by proprietors of the present and yesterday's Overhead Projectors. This is the seventh article in a progression of articles that will be composed from an expert Hardware Specialists perspective with respect to a portion of the present most regular Overhead Projector issues and questions.
https://arizonawet.arizona.edu/users/what-fresnel-lens
The commonplace overhead projector has a top bit of glass (organize glass) and just beneath that is a plastic lens with bunches of round lines on it (the Fresnel lens). Most Fresnel Lenses are set apart on one side showing which side goes toward the light. On the off chance that you realize how to expel it, simply take it out and reinstall it the right way. You ought to never utilize glass cleaner on the Fresnel lens, it can annihilate the plastic lens. To clean your Fresnel lens a delicate fabric hosed with water or cleaner endorsed by the maker ought to be utilized. An expression of alert here: handle the Fresnel lens with care to maintain a strategic distance from scratches or different sorts of damage, this lens is an extravagant piece of your Overhead Projector.
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