Description
Phase-contrast condenser
The phase-contrast condenser is installed in place of the brightfield condenser. The rotating condenser includes four annular diaphragms for use with 10x, 20x, 40x, and 100x objectives and a free hole for brightfield observations. The diaphragms in the turret are used depending on the objective being used.
Plan achromatic phase objectives
Phase objectives differ from regular objectives by having a phase ring in the plane of the exit pupil.
Plan achromatic phase objectives form an image that has the same focus in the center and at the edges and, therefore, the distortion is negligible. Chromatic aberrations are corrected for blue and red, spherical aberration – for green, and the field curvature is corrected for 90% of the field of view diameter.
The 10x objective is designed to work with specimens with or without a coverslip. The 20x, 40x, and 100x objectives are used to observe specimens with a 0.17mm coverslip. The 100x objective supports oil immersion. The objectives are designed for the infinity-corrected tube length. The parfocal distance is 60mm.
Centering telescope
Using a centering telescope, the slider annular diaphragms are aligned with the objective phase rings.