Description
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Polarising Filter Stress Determination
Description
Demonstrate stress patterns in solids with this new and valuable equipment.
Two polarising filters, mounted on a graduated frame are placed on a plastic base.
Clear acrylic pieces of different shapes are introduced between the filters; when pressure is applied to the solids the resulting stress patterns are observed.
An important method of demonstrating polarisation and stress.
Includes instructions.
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Description
These are collapsible pocket magnifiers. The optical system is a single element, glass Double Convex Lens. The housing is made of machined, black high grade plastic for a high finish look. These magnifiers fold flat to fit in your pocket. Scales are etched on the inner faces of the viewerÂ’s base.
Lens, Double Convex, Spherical
Description
Clear glass, ground edges
| Focal length | Power | Add To Enquiry |
|---|---|---|
| 25 mm | 100 mm | +10D |
| 25 mm | 150 mm | +6.6D |
| 38 mm | 50 mm | +20D |
| 38 mm | 100 mm | +10D |
| 38 mm | 150 mm | +6.6D |
| 38 mm | 200 mm | +5D |
| 38 mm | 250 mm | +4D |
| 38 mm | 300 mm | +3.3D |
| 38 mm | 500 mm | +2D |
| 38 mm | 1000 mm | +1D |
| 50 mm | 50 mm | +20D |
| 50 mm | 100 mm | +10D |
| 50 mm | 150 mm | +6.6D |
| 50 mm | 200 mm | +5D |
| 50 mm | 250 mm | +4D |
| 50 mm | 300 mm | +3.3D |
| 50 mm | 500 mm | +2D |
| 50 mm | 1000 mm | +1D |
| 60 mm | 100 mm | +10D |
| 60 mm | 200 mm | +5D |
| 60 mm | 300 mm | +3.3D |
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