M/S LN Wrench

A Handheld Digital Microscope USB Typeis a low-powereddigital microscopewhich connects to a computer, normally via aUSBport. They are widely available at low cost for use at home or in commerce. Their cost varies in the range of tens to thousands of dollars. In essence, USB microscopes are awebcamwith a high-poweredmacro lensand generally do not use transmitted light, but rely on incident light from in-builtLEDslights situated next to the lens. The light reflected from the sample then enters the camera lens. However, the camera is usually sensitive enough not to need additional lighting. As the camera attaches directly to theUSBport of a computer, eyepieces are not required and the images are shown directly on the monitor.

They usually offer modest magnifications (about 1× to 200×) without the need to use eyepieces at very low cost, at least compared to conventionalstereomicroscopesfor example.^[1]The quality of the final image depends on the camera capacity ormegapixelsavailable with the system, varying from 1.3 MP, 2 MP, 5 MP and upwards, as well as operator skill and illumination quality. Bothstill imagesandvideoscan be recorded on most systems. The capacity of most USB microscopes is similar to that of mostcamera phonesof about 2 megapixels.