Meiji Techno’s TC Plan Phase Objectives are made with extra-low-dispersion glass and utilizes advanced multilayer anti-reflection coatings. Five layers of a dielectric thin film are applied to the glass phase plate using a special vacuum deposition technique. The multiple anti-reflection coating in combination with the film reduces the amount of stray light and glare reflected back into the system. The resulting high contrast image is described as a negative or bright contrast phase image. The use of a 546nm green interference filter helps the achromatic objectives produce their best image because they are spherically corrected for green light.
|Type||TC Plan Phase LWD (Biological, Inverted)|
|Optical||Infinity Corrected ∞ Tube Lens|
|Numerical Aperture (N.A.)||0.13||0.25||0.40||0.65|
|Focal Length (F.L.)||50.0mm||20.0mm||10.0mm||5.0mm|
|Working Distance (W.D.)||17.3mm||7.6mm||7.0mm||2.8mm|
|Cover Slip Correction||1.0mm|
|Diameter Threads||0.7965″ (20.1mm) DIN Standard|