An optical window is a basic optical element that is usually used to separate the environment on both sides, such as separating the inside and outside of an instrument, to protect the internal device from the external environment.

01 Protection function

Optical window pieces can protect optical systems or sensitive electronic devices from dust, moisture, pollutants, etc., in the external environment.

02 Transmission function

Selecting the right window piece can transmit the wavelength required for the application, thus achieving the best results. For example, in optical instruments, the window pieces need to ensure that specific wavelengths of light can pass through to achieve the functions of the optical system.

03 Isolation

The window can also be used as an isolation layer to isolate the optical system from the external environment to reduce interference from the external environment.

1、Flat window piece

A parallel flat plate, usually used as a protective film for electronic sensors or external environmental detectors.

2、Wedge window

The two planes have a included Angle, which can avoid the interference effect caused by the reflected light of the front and back surfaces of the high parallel window, and also avoid the optical interference feedback of the laser resonator resulting in poor stability of the laser output, mode hopping and other problems.

3、Ball cover window piece

The protective window in the shape of a hemispherical shell is often used in the application of incident light in a large Angle range, such as detectors and optical sensors.

01 Base material

When selecting the substrate material, it is necessary to consider the wavelength, refractive index, dispersion coefficient, density, thermal expansion coefficient, softening temperature, Knoop hardness and other factors.

02 Surface smoothness

A measure of the flatness of the window surface, usually measured relative to a wave of a specific wavelength (such as 632.8nm).

03 Parallelism

The degree of parallel deviation between the two surfaces of the optical window, imaging applications require high parallel window slices, while laser applications may use low parallel window slices.

04 Surface quality

The indicators used to evaluate surface defects are usually represented by the numbers "scratch" and "pitting".

05 Coating selection

The window film is often plated with anti-reflection film to reduce the surface reflection loss and make the light completely penetrate the substrate. Anti-reflection film types include single-layer anti-reflection film, broadband anti-reflection film and V-type anti-reflection film.

01 There are many brands, materials and types of optical window pieces on the market, with many suppliers and different prices.

02 With the continuous development of optical technology, optical window pieces are more and more widely used in various fields. For example, in laser technology, optical instruments, sensors and other fields, optical Windows play an important role.

In summary, optical window is an important optical element, with a variety of types, materials and parameters to choose from. When choosing, it is necessary to comprehensively consider the specific application requirements and working environment.

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