what was antonie van leeuwenhoek microscope called

Antonie van Leeuwenhoek's microscope is commonly referred to as a "simple microscope" or "single-lens microscope." It was a very small device with a single convex lens mounted in a tiny hole in a brass plate. The microscope had a pin where the specimen was attached, and screws to adjust the focus and position of the specimen. This microscope design allowed magnifications ranging from about 70x to over 250x, with some claims of up to 500x magnification depending on lens quality. It was not a compound microscope, but rather a powerful magnifying glass of his own design. The design did not have a special formal name beyond being known as Leeuwenhoek's simple or single- lens microscope. Thus, it is typically called the "Leeuwenhoek microscope" or simply a "single-lens microscope".