AS ONE Focusing lens for fiber laser HF series

[Features]
· By using synthetic quartz for all the materials that comprise the lens, a condensing lens has successfully been realized which can also tolerate high-output lasers, or high-energy pulse lasers.
· Can be used for condensing and collimating with various types of fixed lasers including Yb fiber lasers, YAG lasers, YVO4 lasers, etc.
· With a lenses with a focal length of 60 mm or more, spherical aberration and coma aberration are sufficiently corrected at a wavelength of 1,064 nm, and laser collimated light can be narrowed down to the diffraction limit spot diameter.
· It can be used with a fiber coupled laser in the wavelength range of 1,040 to 1,150 nm thanks to the antireflection coating with a wide band.
· Because a transmittance of approximately 632.8 nm can be obtained, a He-Ne laser can be used as the guide light.
· Dedicated lens holders (LHF-M29-25, LHF-M34-30 and LHF-M50.9-50) are available for fixing condenser lenses.
· The HFTLSQ-15-20PF1 includes a dedicated adapter for installing the fixed condensing lens holder (LHF-M29-25).
· The HFTLSQ-20-30PF1 includes a dedicated adapter for installing the fixed condensing lens holder (LHF-M34-30).
· Separately sold protective glass can be attached to protect the objective lens from spray from laser processing.
· * Use condensing lenses when imaging an object with infinite distance as the focus or changing the positional light source to parallel light.
· * Sufficient optical performance cannot be obtained when used for imaging at a close distance, etc.
· * The condensing lens has an orientation for light incidence.
· * Be sure to have parallel light incident from the top (with the engraved stamp on the lens barrel upright).
· * When reversed, chromatic or spherical aberration may increase and the condensing spot may widen or images may be out of focus.
· * When used outside the specified wavelength range, chromatic aberration and transmittance will worsen.
· * The condensing lens may become very hot and the condensing lens focal distance may vary if a high-power laser is used or the product is used near a light source generating intense heat.
· * Heat dissipation measures are required if irradiating for long periods.
· * If a smaller spotting diameter is desired, widen the incident beam diameter (1/e^2) to approximately half of the effective diameter (De) of the condensing lens.
· * This condensing lens is not an achromatic lens.
· * Chromatic aberration is not corrected.
[Product Specifications]
· [ Common Specifications]
· Material: Synthetic Quartz
· Frame: Aluminum; Surface Processing: Black Alumite
· Design Wavelength: 1,064 nm
· Coating: Anti-reflective Film
· Transmittance: > 98.5% (1,060 – 1,080 nm), > 97% (1,040 – 1,150 nm), > 53% (600 – 700 nm)
· Laser Yield Strength: 7 J/cm2 (Pulse Width 10 ns, Repetition Frequency 20 Hz)
· [Individual Specifications]
· Focal distance f: 20 mm
· Outer diameter φDc: φ24 mm
· Effective Diameter φDe: φ12 mm
· Length L: 16 mm
· Fixing Screw Ma: M22, P0.75
· Mounting Screw Mb: M22 P0.75
· NA : 0.3
· WD : 13.7 mm
· Permissible Incidence Angle: ±1.8°