Leica DM IRB Technical description, Performance data of objectives, Objective lettering, 0Ê -Ê

Technical description

All techniques, not only in microscopy, are subject to limits of performance due to basic physical laws and principles of eye physiology. The following information should therefore be remembered when using the microscope.

Performance data of objectives

The Leica DM IRB microscope is based on tube length ∞ (infinity) and a focal length of the tube lens of f = 200 mm.

!n. b.:

Therefore, only objectives with the ∞ engraving and M 25 screw thread may be used.

The current objective range is constantly being updated. Please ask your Leica agency for a copy of the “Objective data sheets”!

Objective lettering

Examples and explanation of symbols:

∞/ -

C PLAN 10x/0.22

∞/ 0.17

C PLAN 40x/0.65

∞

Objective for tube length infinity (∞).

–

The objective can be used with and without a coverslip.

0Ê –Ê 2

For use with coverslips with a thickness of 0 – 2 mm.

0.1Ê –Ê 1.3

For use with coverslips with a thickness of 0.1 – 1.3 mm.

0.17

The objective may only be used with a coverslip of the standard thickness 0.17 mm. No coverslip or a coverslip with a very different thickness will greatly impair the image, particularly with high objective apertures (see below).

0

Use without a coverslip, e. g. for cell smears, incident light.

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