Products
Home /CRYSTALS /

Window crystals

/LiF crystal lithium fluoride

LiF crystal lithium fluoride

HGO grows LiF crystals in house using Czochralski technology. LiF crystal or lithium fluoride crystal is an optical material with outstanding transmittance in VUV region. It is also used for windows, prisms, and lenses in the visible and infrared in 0.104µm-7µm.

LiF single crystal is sensitive to thermal shock and would be attacked by atmospheric moisture at 400°C. When working at a high temperature of 600°C, the LiF crystal softens and is slightly plastic, so it can be bent into radius plates. In addition irradiation produces color centers. Hence, users should take measures to protect LiF crystals from moisture and high energy radiation damages.

What is more LiF can be cleaved along (100) plane and less commonly (110) plane. The optical characteristics are good and yet the structure is not perfect and cleavage is difficult.

  • Product Origin:

    China
  • Shipping Port:

    Fuzhou, China
  • Lead Time:

    3-4weeks
Share To : f t y b l ins
  • Product Detail

Descriptions:

HGO grows LiF crystal lithium fluoride. LiF crystal or lithium fluoride crystal is an optical material with outstanding transmittance in VUV region. It is widely used for windows, prisms, and lenses in the visible and infrared in 0.104µm-7µm.




Main application:

1) X-ray monochromator plates UV photomultiplier tubes

2) Optical material for VUV applications

3) Windows, prisms, and lenses


Main Features:

1) Tends to create color centers.

2) Max temperature for application:400°C

3) Excellent VUV region transmittance

4) Sensitive to thermal shock


Optical properties of LiF crystal:

Transmission Range

0.105 … 6 µm

Refractive Index

no = 1.37327@2.5µm, 1.624@0.12 µm

Reflective Loss

4.4% @4.0 µm

Poisson Ratio

0.326

Absorption Coefficient/cm-`1

0.74×10-3@2.7µm


Basic properties of LiF crystal:

Density

2.64g/cm3

Melting Point

870

Molar Mass

25.9394

Lattice Parameters

4.0279 Å

Thermal Conductivity

4.01 W/(m K)

Specific Heat

1562 (J kg-1 K-1)

Thermal Expansion Coefficient

28.1 - 34.8 (10-6/K)

Knoop Hardness

102–103kg/mm2

Mohs Hardness

3

Young's Modulus

64.79 GPa

Shear Modulus

55.14 GPa

Bulk Modulus

62.03 GPa

Rupture Modulus

10.8 MPa

Elastic Coefficient

C11 = 112 / C12 = 45.6 / C44 = 3.2 GPa

Crystal Type

Fm3m, cubic, NaCl type structure

Dielectric Constant

9.0 @ 25 °C, f = 100...109 Hz

Solubility in Water

0.27 (g/100 cm3) @ 18 °C

Apparent Elastic Limit/ MPa

11.2@1620 psi

Cleavage

-100


HGO offers LiF specifications:

Orientation:

<100>

Wavefront Distortion:

λ/4per inch @ 632.8 nm

Dimension Tolerances

rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm

Surface Quality:

20/10 Scratch/Dig MIL-O-1380A

Parallelism:

< 20

Perpendicularity:

< 10

Clear Aperture:

> 90%

Surface Flatness:

< λ/8 @ 632.8 nm

Chamfer:

< 0.25 mm @ 45deg.

Size

Upon customer request

Quality Warranty Period

One year under proper use


Why Choose HGO ?

HG OPTRONICS.,INC. is one of few growers who LiF crystals in house. The use of high quality starting materials for crystal growth, whole boule interferometry, precise inspection of scattering particle in crystal using He-Ne laser and delicated measurement of bulk losses using spectrophotometer assures that each crystal will comply with customer’s specification and perform well.

In addition, we can also produce other types of window crystals like YAG crystals, BaF2,MgF2 Crystals, etc.

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Related Products
MgF2 crystal window
MgF2 crystal Magnesium Fluoride

MgF2 or Magnesium Fluoride is positive uni-axial crystal with a very high optical transmittance from the vacuum UV to IR. It is regularly used for optical elements where extreme ruggedness and durability is required. It also has a large resistance to mechanical and thermal shock, to optical radiation, and is chemically stable, making it a very useful materials for UV and IR optics.

Read More
CaF2 crystal windows
CaF2 crystal Calcium Fluoride windows

CaF2 or Calcium Fluoride is a cubic crystal with an excellent transmission from 130 nm to 10 μm and has widespread applications as transparent windows in the ultraviolet and infrared spectra.

Read More
Pure YAG window crystal
YAG window crystals Yttrium Aluminum Garnet

Pure YAG Yttrium Aluminum Garnet is a new substrate and window material that can be used for both UV and IR optics. It is particularly useful for high-temperature and high-energy applications. The mechanical and chemical stability of YAG is comparable to sapphire crystal, but YAG is unique with no birefringence which is extremely important for some optical applications.

Read More
Cr4+:YAG passive q-switch
Cr4+:YAG crystals Chromium Doped Yttrium AIuminum Garnet

Cr4+:YAG (Y3Al5O12) crystal is ideal for passive Q-switch operation of Nd:YAG and other Nd3+ or Yb3+ doped laser crystals in the wavelength range of 900 nm to 1200 nm. Passive Q-switches or saturable absorbers provide high power laser pulses without electro-optic Q-switches, thereby reducing the package size and eliminating a high voltage power supply. A remarkable feature of Cr4+:YAG is the high damage threshold of >10 J/cm2@1064 nm, 10 ns. Its absorption band extends from 900 nm to 1200 nm and peaks around 1060 nm with a very large absorption cross-section.

Read More
Custom Plano Concave Cylindrical Lens
Plano-Concave Rectangular Cylindrical Lenses

Plano-concave rectangular cylindrical lenses provide uni- axial negative imaging for anamorphic beam expansion and a wide range of applications.These lenses may also be used as mirror blanks if a concave cylindrical surface mirror is required.

Read More
China Zinc Selenide (ZnSe)
IR Windows Zinc Selenide(ZnSe) Windows

ZnSe is used widely for IR components, windows and lenses, and applied for Thermal Imaging, FLIR,  Medical systems and Co2 Laser Zinc Selenide (ZnSe) Windows are ideal for a wide variety of infrared applications including thermal imaging, FLIR, and medical systems.

Read More
Uncoated N-Bk7 High Precision Optical Windows
AR Coated BK7 Windows

BK7 window is the most common type of window. It has good performance over visible and near infrared wavelength regions. At the same time, BK7 window is ideal for applications require minimal transmitted beam deviation. It is suitable for AR coating.

Read More
Diode pumped picosecond Pr:YLF laser crystals
Pr:YLF crystals Protactinium doped Yttrium Lithium Fluoride

HGO grows Pr:YLF laser crystals using Czochralski technology. Pr3+:YLF has been found as promising laser material for producing visible lasers directly and UV lasers through intracavity second-harmonic generation. Very few laser materials have the necessary properties for the realization of lasing in the visible spectral range. Trivalent praseodymium (Pr3+) is known to be an interesting laser ion for use with solid-state lasers in the visible spectral range because of its energy levels scheme, providing several transitions in the red (640 nm, 3P0 to 3F2), orange (607 nm, 3P0 to 3H6), green (523 nm, 3P0 to 3H5), and dark red (720 nm, 3P0 3F3+3F4) spectral regions.

Read More
Leave A Message
Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

about

contact