Method of a light field and its version

The method of a light field in passing light is applied at studying transparent preparations with included in them absorbing (absorbing light) particles and details. It can be, for example, the thin painted cuts of animal and vegetative tissues. At absence of a preparation the bunch of light from condenser, passing through an objective, gives in regular intervals shined field near to a focal plane of an ocular. At presence in a preparation of an absorbing element there is a partial absorption and partial dispersion of light falling on it, it causes occurrence of the image. Application of this method is possible at supervision of not absorbing objects, but only in the event that they disperse shining bunch so strongly, that its significant part does not get in an objective. Method of slanting illumination - a version of the previous method.

Difference between them consists that on object direct light under a greater corner to a direction of supervision. Sometimes it helps to reveal «relief» object due to formation of shadows.

The method of a light field in reflected light is applied at research of opaque objects reflecting light, for example metals or ores. Illumination of a preparation (from the gaffer and a translucent mirror) is made from above, through an objective which simultaneously plays also a role condenser. In the image created by an objective, the structure of a preparation is visible because there is distinction in reflecting ability of its elements; on a light field also the heterogeneity, dispersive light falling on them are allocated.

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