N PLAN

State: Out of stock

The N PLAN objective class comprises further improved achromats with good field flatness up to 22 mm. N PLAN objectives are suitable for transmitted light and DIC, N PLAN PH for phase contrast. For incident light applications including differential interference contrast (DIC), N PLAN EPI objectives are available. The N PLAN EPI BD can also be used as a darkfield objective. The N PLAN EPI incident light objectives feature excellent image contrast and safe working distances.

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Leica Achromatic Lens

Leica achromats are powerful objectives for standard applications in the visual spectral range, offering field flatness up to 23 mm. The absolute value of the focus differences between red wavelength and blue wavelength (2 colors) is ≤ 2x depth of field of the objective.

Objective Classes

Objectives are categorized into performance classes on the basis of their transmission, chromatic correction, planarity, and others. From the point of view of the International Organization of Standardization (ISO), there are three groups of objective classes differing in quality of chromatic correction.

Objective Class	Field Flatness	Absolute Value(s) of Focus	Application
Achromats	up to 23 mm	between red and blue wavelength (2 colors) is ≤ 2x depth of field	for standard applications in the visual spectral range
Semi-Apochromats	up to 25 mm	for red wavelength and blue to green wavelength (3 colors) are ≤ 2.5x depth of field	for applications in the visual spectral range with higher specifications
Apochromats	up to 25 mm	for red wavelength and blue to green wavelength (3 colors) are ≤ 1x depth of field	for applications with highest specifications in the visual range and beyond

Depth of field:

Leica Microsystems has aligned all three performance classes of its range of objectives to the needs of its customers and the specific requirements of a wide variety of applications – while offering a convincing price-performance ratio.