Birefringent Optical Crystals TiO2

Birefringent Optical Crystals TiO2


Birefringent Optical Crystals TiO2

Titanium dioxide (TiO2) is a birefringent optical crystal that exhibits a high refractive index and strong birefringence, making it useful in a variety of optical applications. It has a tetragonal crystal structure and is commonly found in nature as the minerals rutile and anatase.

When light passes through a birefringent crystal, it splits into two orthogonal polarizations, each traveling at a different speed and refracting at different angles. This effect is known as birefringence, or double refraction, and is dependent on the crystal structure and orientation.

TiO2 is used in various optical devices, such as polarizing prisms and beam splitters, due to its strong birefringence and high refractive index. It is also used as a coating material for optical components, such as lenses and mirrors, to improve their performance and durability.

In addition to its optical applications, TiO2 is also used as a pigment in paints, plastics, and other materials due to its white color and opacity. It is also used as a catalyst in various chemical reactions, such as the oxidation of organic compounds.

Birefringence D=he-ho
Refractive index h at l= 0.63 µm Thermal optical Coef. dh/dT 10-6/°K Structure and lattice constant, Å Melting point °C Density g/ cm3 Hardness (Mohs) Thermal Coef. 10-6/K
TiO2 (rutile)
+ 0.282
a: -0.72
c: -0.42
Tetragonal a=4.593  c=2.958 1840 4.26 7 a: 7.14
c: 9.19

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