goldGangshi optical vacuum window panel

High quality diamond wafers are ideal as optical windows, mainly in the infrared, far-infrared, and terahertz ranges. These diamond chips are composed of high-purity polycrystalline diamonds grown by high-power microwave plasma assisted chemical vapor deposition (CVD).

Diamond has various extraordinary properties and is an ideal material to meet the requirements of optical applications. It has the highest thermal conductivity to date, exhibits the widest spectral transmission range, and is very robust. The transmission of diamonds starts with ultraviolet light at 225 nanometers, covering the entire spectrum from visible light in the infrared and terahertz ranges to radar frequencies.

Except for the weak absorption band of 5 μ m, which no longer absorbs and affects the infrared optical transparency of diamond. High power density optical applications, such as high-power carbon dioxide lasers, greatly benefit from the enormous thermal conductivity of this extraordinary material.

Products available

1. Diamond windows

Surface graphics and smoothness

The window used for optical applications is polished to obtain a very smooth surface. Standard surface roughness< 10nm rms.

One factor to consider when designing windows is the wavefront distortion of transmitted light, which can be applied to633 nmThe number of double transmission interference fringes measured at the location is represented. Alternatively, the flatness of the surface can be specified. In diamond materials, various interferometers are used to evaluate the optical properties of diamond glass.

*Sample data.

2. Wedge shaped window panel

In the case of long wavelengths, interference effects from surface reflections may become troublesome. In these cases, wedge-shaped windows are desirable. Usually, the wedge angle is30Angle division, but other angles are also possible. The example theory shown in the following view is20 - 25μmThe wavelength range of the transmission spectrum is wedge-shaped and parallel windows.

3，Brewster window panel

Brewster windows are uncoated windows installed at an inclined angle (Brewster's angle).

Under these conditions, there is no reflection loss for the p-polarized component of light entering and leaving the window. For diamond, Brewster's angle is 67.2 °. Therefore, the Brewster window displays a transmission that is nearly 100% wavelength independent of radiation. This concept is of great significance for multispectral applications such as free electron lasers, multi wavelength infrared lasers, or terahertz optical systems.

Can provide technology

1. Vacuum sealing technology

2. Flanges

Standard flange size:

Additional options:

Double sided flange threaded hole low magnetic permeability mechanical protective ring

3. Heat dissipation

In high-power applications, the enormous thermal conductivity of diamond becomes very important. It allows for effective heat dissipation through appropriate edge cooling. Especially for brazed windows, the thermal resistance of vacuum flanges is relatively low. Therefore, buried water channels are an effective heat dissipation technology.

For very high heat loads, diamond materials have developed designs with ultra-high cooling efficiency.

4. Coating

When light passes through an uncoated diamond window, each surface has approximately16.7%The light is reflected back. Coating both sides with an anti reflective film will increase the system's throughput and reduce reflection through the system(shadow)The danger caused.

A diamond specific coating with low absorption and high power density has been developed for chemical vapor deposition of diamond.