There is also provided assays for screening for inhibitors of cytokinesis.

A receiver aperture (7) in order to mask out a port of the received light beams (4) is arranged in front of the receiver (5).

To increase this area of in-depth sharpness, it is necessary to reduce the aperture, if, however, lighting is favourable.

A diaphragm (4) is applied on the converging lens (2) for stopping down part of the laser radiation (5) emitted by the semiconductor laser emitter (1).

Between the object (4) and the surface (3) is an object-illuminating or a semi-reflecting layer for filtering, stopping down or dimming the light from the plate (1).

If one must make photographs where the f-stop is important, the Industar 22 would be the best choice, since f-stop settings such as f8 and f11 do not seem to trouble it ; on the contrary !

Since this unit allows for panoramic views by translation of the front panel, users had to be careful to close the diaphragm enough to have a clear picture on the entire surface of the plate.