Ronar-Smith - Model SL-1064-L140-380Q-D8 -F-Theta 1D Scan Lens
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.
A telecentric f-theta lens is a specialized type of f-theta lens that has unique properties which make it useful in certain applications. Unlike a standard f-theta lens, the chief rays at different scanning angles from a telecentric f-theta lens are parallel to the optical axis and perpendicular to the image plane, thus can produce better consistent spot size and imaging resolution over the scanning range compared with normal f-theta lens.
Telecentric f-theta lens can be used in applications where spot size/shape needs to keep constant over the working area, or an object may be displaced from the focal plane a bit, such as when cannot guarantee the accurate distance to be processed, using telecentric f-theta lens can make sure no distortion happens.
F-Theta Lens - Optical Glass (SL)
F-Theta lens is commonly used in galvanometer scanning systems for laser marking, engraving, and cutting; with the ability to deliver a focused spot to many points within a scanning field. We also supply lens adaptors for major scan head providers in the world.
F-Theta Lens - Fused Silica (SL-Q)
SL-Q Series F-Theta lens is developed for ultrafast lasers with short pulse width and high pulse energy laser applications. These lenses are made with low dispersion Fused Silica with optical design to avoid back reflection and ghost image.
Telecentric F-Theta Lens - Optical Glass (TSL)
Telecentric F-Theta lens is a special type of lens system whereby the deflected off-axial laser beam can be perpendicularly focused on the workpiece as similar to the on-axial focusing beam. The advantage of the telecentric scan lens is that it is able to flatten the field curvature to the least distortion and yet offering superb spot quality throughout the scan field.
Telecentric F-Theta Lens - Fused Silica (TSL-Q)
For high powered laser and ultrafast laser sources, we offer TSL-Q series telecentric F-Theta lens to minimize thermal lensing and focal shift.
F-Theta Lens - CO2 Laser 9.4/10.6μm (SL1)
F-Theta lens is commonly used in conjunction with galvanometer scanning mirrors in laser engraving, cutting, and marking systems. Typically the F-Theta distortion of the lens is kept less than 1% so that it is able to produce a precise spot in the flat field on the image plane.
F-Theta Lens - CO2 Laser 9.4/10.6μm (SL2)
Doublet F-Theta lens provides better performance than a singlet. It has more even spot size and less spot distortion over the scan field. We use ZnSe or GaAs for this series of scan lenses. Lens adaptors for major scan head providers are available upon request.
F-Theta Lens - CO2 Laser 9.4/10.6μm (SL3)
SL3 series F-Theta lens consists of three ZnSe elements with or without a protective window; they can reduce spot distortion and achieve more even spot size over the scanning field compared to SL1 and SL2. SL3 is used for finer CO2 laser applications like an electronic microprocessor.
Telecentric F-Theta Lens - CO2 9.4/10.6μm (TSL)
Telecentric F-Theta lens has special configurations in which the arrangement of optics is designed to focus down the beam so that it is always perpendicular to the flat field. This is accomplished by ensuring that the system `stop` is located at the front focal point of the lens system. The `stop` is located at the position where the beam is deflected from the axis. In a single-axis scanning system, this location is at the scanning mirror. For two-axis scanning, the stop is mid-way between the mirrors. Adaptors for major scan head providers are available upon request.
Achromatic F-Theta Lens (SLA)
Ronar-Smith® achromatic F-Theta lens is designed to limit spherical and chromatic aberration, and bring in two different wavelengths (working and visible wavelength) onto the same plane. This enables the transmission of wavelength-specific laser beam during laser-material processes while ensuring that the visible (feedback) and laser beam wavelength are temporally and spatially matched. Our achromatic scan lens enables machine vision in industrial processes for automation control and feedback while ensuring the product quality is not compromised.
Achromatic Telecentric F-Theta Lens (TSLA)
When a vision system is being integrated into a laser machining system, our achromatic telecentric f-theta lens is color-corrected between working wavelength and vision wavelength. The achromatic telecentric f-theta lens offers the benefits as same as the normal telecentric lens yet able to provide accurate vision positioning function. It is very useful for online inspection systems where the operator does not need to have an offline inspection on the workpiece.
Water Cool F-Theta Lens (SL-WC)
SL-WC series of water cool scan lens is developed for high power and large aperture laser welding application, it could minimize lens thermal effects and focal shift.
F-Theta Lens For Laser Cleaning (SL-LC)
SL-LC series of scan lenses are developed for laser cleaning applications.
Product Type: 1D Scan Lens *NEW*
Part Number: SL-1064-L140-380Q-D8
Wavelength (nm): 1064
EFL (mm): 380
Scan Field (mm x mm): 140
Input Beam Dia (1/e2) (mm): 8
F-Theta (Standard or Telecentric): Standard
Material: Fused Silica
Mounting Thread: 2-Φ4.5
WD (mm): 450