MICROSCOPIC LIFE. EXTRAORDINARY SHELLS.
Explore a modelled slide of prepared diatom shells.Choose a shape. Look closer. What can you discover?
EXPLORE THE SLIDE
Switch on, move across the slide and choose a shape that catches your eye.
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TAKE YOUR TIME
If the shape disappears, return to 4×. “Return to the starting area” restores the first field without changing focus.
Guidance is always welcome. Nothing is scored.
Discover another shape to explore its illustration.
Illustrative 3D valve · simplified thickness and pores · not a reconstruction or measurement.
Preparing the 3D illustration…
Explore one generic valve, one half of a diatom's two-valve shell. This illustration represents the discovered shape; it does not identify a species or reproduce your exact specimen. Each illustration is sized to fit this view, so their displayed sizes cannot be compared.
Diatoms are microscopic algae. Their intricate cell walls contain silica — the main ingredient of glass. Those walls can remain after the living cell is gone.
This slide models prepared shells, so nothing swims away. The round valve has rows of tiny openings; the long valves show a different form. The patterns here are illustrative and do not identify a species.
The round shell in this model is just 0.082 millimetres across.
The objective narrowed your field of view. Its higher numerical aperture also let you resolve finer detail. Turning focus aligned the shell with the sharpest plane. Enlarging a blur alone would not reveal more structure.
BEHIND THE DISCOVERY
The microscope is interactive 3D. The brightfield view is a generated teaching image of stationary, prepared diatom shells, not a microscope photograph. Colours and shell geometry are illustrative.
A fixed camera field is scaled by the 4×, 10× and 40× objectives. Their numerical apertures are 0.10, 0.25 and 0.65. Resolution and defocus affect the whole image continuously using an approximate Gaussian blur at 550 nm; this is not a full wave-optical calculation.
Image brightness is kept comparable between objectives. The camera view is displayed upright for navigation. Fine stage motion is exaggerated on the 3D stand. Objective changes retain the same field centre and focal plane. Real instruments may need additional alignment and careful handling.
The optional 3D illustration shows a generic single valve, one half of a diatom's two-valve shell. Thickness and pores are simplified. It is not a reconstruction, a measurement, or a species identification. Its enlarged shape is separate from the prepared-slide image and does not change the optical model or kept comparisons.
The optical information is unchanged.
The same controls work with keyboard arrows, touch or a mouse. The focus control accepts arrow keys; the camera view accepts arrow keys to pan.
Each set compares the same shell at the position and focus you found. Only the objective changes. These views stay unchanged while you explore.
At 10× you may see a hint of rows. At 40×, the higher numerical aperture and careful focus separate the finer structure.