AS ONE Focusing lens for fiber laser HF series

[Features]
·By using synthetic quartz for all the lens materials, a condenser lens that can withstand high-power lasers and high-energy pulse lasers have been realized.
·It can be used for focusing and collimating various solid-state lasers such as Yb fiber lasers, YAG lasers, and YVO4 lasers.
·For lenses with a focal length of 60 mm or more, spherical aberration and packing washer are sufficiently corrected at a wavelength of 1,064 nm, and laser collimated light can be narrowed down to the spot diameter at the diffraction limit.
·The wide band anti-reflective coating allows it to be used with fiber coupled lasers in the wavelength range of 1,040 to 1,150 nm.
·A certain amount of transmittance is obtained at 632.8 nm, so a He-Ne laser can be used as a guide light.
·Dedicated lens holders (LHF-M29-25, LHF-M34-30, LHF-M50.9-50) for fixing the condenser lens are available.
·The HFTLSQ-15-20PF1 comes with a dedicated adapter for attaching to the fixed condenser lens holder (LHF-M29-25).
·The HFTLSQ-20-30PF1 comes with a dedicated adapter for attaching to the fixed condenser lens holder (LHF-M34-30).
·Separately sold protective glass can be attached to protect the lens from flying by laser processing.
· * Use a condenser lens when you want to focus an object at infinity, or when you want a point light source to be parallel ray.
· * Sufficient optical performance cannot be obtained such as when used for short-distance imaging.
· * The condenser lens has a direction to let in light.
· * Be sure to inject parallel ray from the upper side (looking at the engraving on the side of the lens barrel upright).
· * If it is reversed, chromatic aberration and spherical aberration will increase, and the focused spot may become larger or the image may appear blurred.
· * If used outside the specified wavelength range, chromatic aberration and transmittance will deteriorate.
· * When used with a high-power laser or near a light source that produces high heat, the condenser lens becomes hot and the focal length of the condenser lens may change.
· * When irradiating for a long time, heat dissipation measures are required.
· * If you want to reduce the focusing spot diameter, widen the incident beam diameter (1/e^2) to approx. half the effective diameter (De) of the condenser lens.
· * This condenser lens is not an achromatic lens.
· * Chromatic aberration is not corrected.