Low cost beam-expanding relay lens

A microscope, comprising:

• a beam source configured to produce a laser beam;
• an objective lens;
• a first scanning mirror configured to operate along a first axis to reflect the laser beam from the beam source to scan a specimen via the objective lens;
• a second scanning mirror configured to operate along a second axis, perpendicular to the first axis, to reflect the laser beam from the beam source to scan a specimen via the objective lens;
• a first pair of cylindrical lenses, positioned between the objective lens and the first scanning mirror, at points along a straight line, having a first focal point aligned with the first scanning mirror, and configured to receive the reflected laser beam from the first scanning mirror and provide the laser beam to the objective lens;
• and
• a second pair of cylindrical lenses, positioned between the objective lens and the second scanning mirror, at points along the same straight line, having a second focal point aligned with the second scanning mirror, and configured to receive the reflected laser beam from the second scanning mirror and provide the laser beam to the objective lens.