Nikon Labophot Gebrauchsanweisung - Seite 14

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Condensers

1) Abbe condenser

= 1.25. This is used with 4X -

100X ob-

jectives. The graduation

this

condenser

indicates the diameters in mm of the aperture

diaphragm opening.

2) Swing-out Achromat condenser

N.A.

0.9. Dry system.

It is used in combination with objectives from

2X to 100X, and provided with a swing-out top

lens which is to be swung out when using the

2X or 4X objective. Its adjustable aperture scale

is graduated in N.A. ratings.

3) Achromat/aplanat condenser

1.35. Oil system.

The spherical, coma and ch rom<ltic aberrations

being ideally

corrected,

this large aperture

condenser is used with 20 X - 100 X ob jectives.

The standard thickness of glass slide should be

1.2mm.

Apply oil between the condenser and glassslide.

is recommended

that

this condenser be

employed especially in combination

with the

Plan Apochromat

objectives. When using the

lOOX objective for observation in combination

OPTICAL PATH

Collector

lens

Halogen

lamp

with the CFW lOX eyepiece, it is possible to

close the field diaphragm down to 45% of the

viewfield.

4) Darkfield condenser (Oil)

N.A.

1.43 -

1.20. Oil system. Used in dark-

field

microscopy.

Apply

oil

between

the

condenser and glass slide. (It is recommended

to use a thinner glass slide.)

This condenser is used in combination with the

objectives

lOX

lOOX with aperture dia-

phragm (N.A.:

up to 1.11.

5) Darkfield condenser (Dry)

N.A.

0.95 - 0.8. Dry system. Used in dark-

field microscopy. Magnifying powers of usable

objectives are lOX - 40X (N.A.:

up to 0.7).

Illumination System

(Fig. 15)

The optical

system for

illumination

in the

LABOPHOT microscope is constructed to fulfill

the Koehler illumination

requirements perfect-

ly, and offers a bright, uniform

field without

any change-over manipulation.

As a standard light source, use the Halogen

lamp 6V 20W (PHI LIPS 7388).

Objective

Filter

Field lens

Fig. 15