Float Window

While floating through the molten tin, the combination of gravity and surface tension results in smooth and flat surfaces on both sides.

a) Smooth and flat surface and good vision.

b) Excellent optical performance.

c) Stable chemical properties.

d) Resistant to acid, alkaline, and corrosion.

Specification of Float Window

Optical windows are an essential component of many optical systems, including lasers, cameras, telescopes, and microscopes. They allow light to enter or exit an optical system while providing a barrier to dust, moisture, and other contaminants. There are various types of optical windows available, including sapphire, quartz, and borosilicate glass.

Material	Float Glass
Diameter	1 to 500 mm
Diameter Tolerance	+0/-0.02 mm
Thickness Tolerance	±0.01 mm
Surface Quality	10-5
Surface Figure	λ/10
Parallelism	1 Minute
Coating	Uncoated, AR, HR, Beamsplitter, etc.

Types of optical window glass for your needs:

Quartz window

Sapphire glass window

ZnSe selenide window

Germanium IR window

Si window

borosilicate glass windows

Bk7 window

What are Float Glass Optical Windows?

Float glass is a type of glass that is manufactured by floating molten glass on a bed of molten tin. This process results in a uniform thickness and a flat surface, making it an ideal material for optical windows. Float glass optical windows are made from a high-quality, low-iron glass that has excellent optical properties.

Advantages of Float Glass Optical Windows

Float glass optical windows offer several advantages over other types of optical windows. Some of the benefits include:

High Transmission

Float glass optical windows have excellent optical properties, providing high transmission of visible and infrared light.

Low Birefringence

Birefringence is the property of a material that causes light to split into two polarizations. Float glass optical windows have low birefringence, making them suitable for applications that require polarization control.

Cost-Effective

Float glass optical windows are more cost-effective than other types of optical windows, such as sapphire or quartz.

High Durability

Float glass optical windows are highly durable and can withstand harsh environments and temperature fluctuations.

Applications of Float Glass Optical Windows

Float glass optical windows are used in a wide range of applications, including:

Laser Systems

Float glass optical windows are commonly used in laser systems as protective windows or beam splitters.

Microscopy

Float glass optical windows are used in microscopy to protect the lens from dust and other contaminants.

Industrial Applications

Float glass optical windows are used in industrial applications that require high durability, such as sensors, displays, and cameras.

Selection Criteria for Float Glass Optical Windows

When selecting float glass optical windows, several factors should be considered, including:

Material

The quality of the float glass material should be assessed to ensure that it meets the required optical and mechanical properties.

Coatings

Float glass optical windows can be coated with various materials, such as anti-reflection coatings, to improve their optical performance.

Thickness

The thickness of the optical window should be determined based on the application requirements, such as the required transmission or durability.

Size

The size of the optical window should be selected based on the dimensions of the optical system and the required field of view.

Surface Quality

The surface quality of the optical window should be evaluated to ensure that it meets the required specifications, such as roughness and flatness.

Environmental Conditions

The environmental conditions, such as temperature and humidity, should be taken into consideration when selecting float glass optical windows to ensure that they can withstand the intended operating conditions.

Manufacturing Process of Float Glass Optical Windows

Float glass optical windows are manufactured using the following process:

Raw materials, including silica sand, soda ash, limestone, and dolomite, are mixed and melted in a furnace at a temperature of around 1500°C.

The molten glass is then poured onto a bed of molten tin, forming a uniform layer of glass that is cooled gradually.

The cooled glass is then cut into the required sizes and shapes using diamond-tipped tools.

The optical windows are then polished to achieve the required surface quality.

Cleaning and Maintenance of Float Glass Optical Windows

Float glass optical windows require proper cleaning and maintenance to ensure their long-term performance. Here are some tips for cleaning and maintaining float glass optical windows:

Cleaning

Use a soft, lint-free cloth or a microfiber cloth to clean the optical window. Avoid using paper towels or abrasive materials, as they can scratch the surface of the window.

Apply a small amount of a gentle cleaning solution, such as isopropyl alcohol or lens cleaning solution, to the cloth.

Gently wipe the surface of the optical window in a circular motion, starting from the center and moving towards the edges.

Use a dry cloth to remove any remaining cleaning solution.

Maintenance

Store the optical windows in a clean, dry environment to avoid contamination and damage.

Inspect the optical windows regularly for any signs of damage or wear, such as scratches or cracks.

Handle the optical windows with care, using gloves or other protective equipment to avoid fingerprints or smudges.

Avoid exposing the optical windows to extreme temperatures or humidity, as this can affect their optical properties.

FAQs

Float glass optical windows are a cost-effective and high-quality option for many optical applications. They offer excellent optical properties, low birefringence, and high durability. When selecting float glass optical windows, it is important to consider factors such as material, coatings, thickness, size, surface quality, and environmental conditions. Proper cleaning and maintenance of float glass optical windows can ensure their long-term performance and reliability.

What is float glass?

Float glass is a type of glass that is manufactured by floating molten glass on a bed of molten tin.

What are the advantages of float glass optical windows?

Float glass optical windows offer high transmission, low birefringence, cost-effectiveness, and high durability.

What are some applications of float glass optical windows?

Float glass optical windows are used in laser systems, microscopy, and various industrial applications.

How should I clean float glass optical windows?

Use a soft, lint-free cloth and a gentle cleaning solution, such as isopropyl alcohol or lens cleaning solution.

How can I maintain float glass optical windows?

Store them in a clean, dry environment, handle them with care, and inspect them regularly for damage or wear.

If you are looking for a reliable custom optics supplier, please contact us, and we will be your best partner.

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