Mirror type, to trace the image of a microscopic object on a paper. A beam splitter prism of optical glass is positioned over the eyepiece with a large size swinging mirror which causes the image of the object to appear on a plane surface enabling its tracing.

Mirror type, to trace the image of a microscopic object on a paper. A beam splitter prism of optical glass is positioned over the eyepiece with a large size swinging mirror which causes the image of the object to appear on a plane surface enabling its tracing.