Portable F-theta Scan Lens , Laser Cleaning Scan Lens STC-1030-1090-100-160-SCR
Portable F-theta lenses are compact and lightweight, suiting robotic arms, handheld equipment and other conditions with lens-weight requirements. Generally, a laser beam passing through a focusing lens system in a marking system undergoes off-axis deflection, producing an abnormal image or distortion on the marking surface relative to an ideal plane. A flat-field focusing lens, also called a field lens or f-theta focusing lens, is a specialized lens system and optical scanning lens widely used in laser processing equipment. Field lenses include f-theta flat-field lenses, telecentric lenses, achromatic field lenses and laser-cleaning field lenses. Because telecentric lenses are expensive, F-theta lenses are mainly used in industrial laser markers. Without distortion, the focal-point position depends on focal length and the tangent of the deflection angle; the focal-point position depends only on focal length and deflection angle, simplifying focus-position calculations. Field-lens selection: Operating wavelength is mainly determined by the laser wavelength. The field lens coating is designed for a specified laser wavelength; use outside that wavelength range can burn the lens. Entrance pupil: with a singlet, the mirror is placed at the entrance pupil, and the maximum usable beam diameter equals the entrance-pupil diameter. Scan range: a larger scan range is desirable, but increasing it enlarges the focal spot and increases distortion. It also increases focal length and working distance. A longer working distance leads to laser-energy loss. Focused spot diameter is proportional to focal length, so a larger scan range produces a larger focal spot, weaker focusing and a rapid reduction in laser power density (inversely proportional to the 2nd power of spot diameter), which is unfavorable for processing. Select a suitable field lens for the processing area or keep lenses with different scan ranges. Focal-spot diameter: for a scanning system with incident laser-beam diameter D, field-lens focal length F and beam-quality factor Q, the focal-spot diameter is d = 13.5QF/D (mm). A beam expander therefore enables a smaller focused spot.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Focal Length [STC Series Laser-Cleaning Field Lenses] | 160 mm |
| Working Distance [STC Series Laser-Cleaning Field Lenses] | 185 mm |
| Scan Range [STC Series Laser-Cleaning Field Lenses] | 100 mm |
| Incident Beam Spot [STC Series Laser-Cleaning Field Lenses] | 8 mm |
| Threaded Connection [STC Series Laser-Cleaning Field Lenses] | Screw fixed |
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