optical properties of glasses?

Answer 1

Properties of Glass: Optical

The properties of glass can be varied and regulated over an extensive range by modifying the composition, production techniques, or both. In any glass, the mechanical, chemical, optical, and thermal properties cannot occur separately. Instead, any glass represents a combination of properties. It is the art of the glass scientist to produce the most favorable combination possible.

When a beam of light falls on a piece of glass, some of the light is reflected from the glass surface, some of the light passes through the glass, and some is absorbed in the glass.

•The measure of the proportion of light reflected light from the surface is called reflectance.
•The measure of the proportion absorbed is the absorptance.
•The measure of the proportion transmitted is the transmittance.

Optical properties are concerned with the behavior of glass toward light, the visible spectrum that extends like the rainbow from violet on one end to red on the other. However, as the term is usually employed, optical refers also to behavior towards the infrared and ultraviolet regions of spectrum. The infrared region lies next to the red end of the visible spectrum and the ultraviolet is on the opposite end of the visible region next to the blue.

The bending (or refraction) of light when it passes through glass is the phenomenon that makes lenses possible. In a lens all the rays that pass through the glass are refracted by the lens and brought to focus at a single point. A measure of the amount of bending is the refractive index. The higher the refractive index, the greater the bending.

But not all colors of light are refracted the same. Blue light bends more sharply than red light in the same glass and the intermediate shades (green, yellow) take a middle course. This difference results in some dispersion and prevents all rays that go through a lens from focusing at exactly the same point. The measure of this difference in refractive index is the dispersion coefficient.

Coatings show selective reflectance, such as the heat-shielding glass that reflects a high proportion of infrared but transmits a high proportion of visible light. Still other coatings eliminate reflectance almost completely such nonreflective coatings are commonly used on lenses.

Answer 2

This is very broad Q?, but I will answer as best as I can.

Some are here.

Clarity.

Opacity.

Reflective index.

Refractive index.

Index of Diffusion.

Deflective Index.

Total internal refection.
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Try and find few more properties on your own.

Try and Google each of this properties, most indexes have numerical value for the type of glass, and look up what they mean.

Answer 3

It's all here.
http://www.physics.ohio-state.edu/~dws/class/880.uf/schott/optical_glass_properties.pdf

Other stuff

Optical glass with high transmission, can be selected nearly free of bubbles and inclusions and has very good homogeneity (down to 1x10-6)
Thermal/Mechanical Properties

Density (at 20º C/68 ºF): 2.51 g/cm³
Thermal Coefficient of Expansion (20/300 °C): 7.0 x 10-6/°C
Strain Point:°C/ °F
Annealing Point:°C/ °F
Softening Point:°C/ °F
Optical Properties

Refractive Index(l=582.1nm): 1.509
Optical transmission
Chemical Properties

Hydrolytic resistance: class 2
Acid resistance: class 1
Alkali resistance: class 2
Electrical Properties

Dielectric Constant: E=

Answer 4

Brittle. the skinny fibres in a pitcher fibre cable enable some bending yet can relatively be snapped if too plenty tension is used. this suggests it is going to deform particularly and has some elasticity.