Fused Quartz Lens Fiber Laser Optical F-Theta Lens Scan Field 70/110/150/175/220/300mm Thread M85

Fused Quartz Lens Fiber Laser Optical F-Theta Lens Scan Field 70/110/150/175/220/300mm Thread M85 

-Comparing with ordinary optical glass, fused quartz lens has Incredibly thermally shock resistant (can be taken from red heat and plunged into water without cracking) Low coefficient of thermal expansion. Optical transmission properties from ultra violet to infra red. Good chemical resistance.

• An f-theta lens is a type of lens that is commonly used in laser cutting, marking, and engraving machines. It is a special type of lens that is designed to produce a flat field of view and yield a displacement that is linear with a scan angle of θ, which means that the image produced by the lens has the same scale throughout the entire image. This makes it an ideal choice for applications that require precise and accurate control over the laser beam, such as in laser cutting and engraving. 
• The name “f-theta” comes from the mathematical formula that describes the lens’s behavior, which is based on the relationship between the angle of the incoming light and the position of the image formed by the lens. F-theta lenses are usually made of high-quality optical materials, such as fused silica or low-dispersion glass, to ensure maximum transmission and minimal distortion. They are also often coated with anti-reflective coatings to reduce the amount of light that is lost due to reflection. 
• In an f-theta lens, the curvature of the lens elements is specifically designed to produce this flat field of view. Light entering the lens is refracted at each element, causing it to change direction and converge toward a focal point. 
• By adjusting the spacing and curvature of the lens elements, an f-theta lens can be optimized for a specific wavelength and field of view. This allows it to produce a flat image over a wide range of angles, making it ideal for precision laser scanning applications.