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Olympus BX51 Руководство по эксплуатации

Aperture iris

diaphragm image

Objective pupil

Fig. 31

N.A. scale

Fig. 32

Compatibility of Objectives and Condensers

Objective

Magnification

1.25X

Applicable to FN 22

10-60X

100X

* When using the U-SC3 swing-out condenser together with a 1.25X to 4X objective, fully open the condenser aperture iris

diaphragm and use the field iris diaphragm in the base as aperture diaphragm. With the 1.25X to 2X objectives, the

surroundings of the field of view may become dark.

}To obtain better illumination in photomicrography using a 1.25X to 4X objective, use of the U-ULC-2 is recommended.

Aperture Iris Diaphragm (Figs. 31 & 32)

70-80%

· The aperture iris diaphragm determines the numerical aperture of the

30-20%

illumination system. It has an effect of adjusting image resolution and

contrast. Stopping down the aperture iris diaphragm increases the depth

of focus.

· Since the contrast of microscope specimens is ordinarily low, setting the

condenser aperture iris diaphragm to between 70 and 80% of the N.A. ²

of the objective in use is usually recommended.

Adjust the ratio by removing the eyepiece and looking into the eyepiece

sleeve while adjusting the aperture iris diaphragm ring @ until the image

shown in Fig. 31 is seen.

}Using the numerical aperture scale:

You can use the condenser numerical aperture scale by adjusting the

aperture iris diaphragm ring @. (Fig. 32)

Abbe

Achromat/aplanat

U-AC2

U-AAC

Applicable

(FN 26.5)

Condenser

Swing-out

U-SC3

Applicable to FN 22

Applicable (FN 26.5) by

moving top lens out of

the light path* (FN 26.5)

Engage top lens in

light path (FN 26.5)

BX51

Ultralow magnification

U-ULC-2

Applicable

(FN 26.5)