Olympus MPlanFL N 20X Epi Objective | 0.40 NA, BD, Infinity Corrected

The Olympus MPLFLN-BD 20× Objective is a high-performance objective engineered for industrial microscopy applications requiring both detailed imaging and versatile contrast enhancement. As part of Olympus's Plan semi-apochromat series, this objective combines 20× magnification with dual brightfield/darkfield imaging capability, making it an essential tool for materials analysis, quality control, and failure analysis.

The brightfield/darkfield (BD) design allows you to switch between two complementary imaging modes without changing objectives. Brightfield mode provides standard reflected light imaging for general observation, while darkfield mode dramatically enhances contrast by illuminating the specimen at oblique angles — revealing surface defects, scratches, grain boundaries, and other features that would be invisible in brightfield alone.

At 20× magnification with a numerical aperture of 0.45, this objective delivers high resolution for detailed examination of industrial specimens. The MPLFLN optical design ensures flat-field imaging with minimal distortion from center to edge, while the plan semi-apochromat correction delivers excellent color fidelity and chromatic aberration control.