Nikon DS-Ri2 Gebruiksaanwijzing - Pagina 26

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View of Images

6.5

Symptom

The image blurs.

The image is too dark or too

bright.

The contrast is low.

Chapter 6

Possible cause

The optical device is out of focus.

The aperture diaphragm is stopped

down too far when using the

microscope.

The magnification setting for the optical

device is too high.

The electronic zoom is being used for

observation.

The exposure time is too long.

The product is used in a place subject

to frequent vibration.

Illumination for the subject is improper.

The exposure is not adequate.

Monitor is not properly adjusted.

The illumination is too bright or too

dark.

Light around the subject affects

contrast.

Field diaphragm and aperture

diaphragm of the optical device

(microscope) are set improperly.

Filter selection for the optical device

(microscope) is improper.

The contrast of the subject itself is low.

The image adjustment is improper.

Monitor is not properly adjusted.

Troubleshooting

Bring the optical device into focus by operating the

focus drive or focusing ring.

Adjust the aperture diaphragm to 70 to 80 percent of

the numerical aperture of the objective, or 70 to 80

percent of the pupil of the objective.

Lower the magnification setting for the optical device.

Note: As a guide, use 500 to 1000 times the

numerical aperture of the objective for the

magnifying power.

Turn off the electronic zooming function.

Note: Use of the electronic zoom may cause an

image to blur depending on the magnification.

Set a higher value for the camera gain and a lower

value for the exposure time.

Note: If setting the exposure time long for a subject in

motion, the subject is blurred.

Use the system in a stable, vibration-free place.

Adjust brightness of the illumination properly.

In AE mode, perform exposure compensation. Or, set

the photometry area and photometry mode properly.

Note: Refer to the instruction manual of the

NIS-Elements.

Adjust the display quality of the monitor properly.

Note: Refer to the instruction manual of the monitor.

Adjust brightness of the illumination properly.

Adjust the exposure.

Darken the interior, or put the cap on the binocular

tube for a microscope.

Adjust the field diaphragm to near the size

circumscribing the field. Adjust the aperture

diaphragm to 70 to 80 percent of the numerical

aperture of the objective.

For a phase contrast microscope or interference

microscope (dual beam or multiple), insert the

specified filter.

Note: For negative-positive images, generally,

inserting a green interference filter (GIF)

improves contrast.

Note: Insert a complementary color filter of the color

of the specimen for stronger contrast.

Consider illumination and/or microscopy method to

compensate for the low contrast.

Set the saturation, hue, contrast, black level, etc. to

an appropriate level.

Note: Refer to the instruction manual of the

NIS-Elements.

Adjust the display quality of the monitor properly.

Note: Refer to the instruction manual of the monitor.

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