AS ONE UV condensing lens
Caution
Product Description
[Features]
·A condenser lens for ultraviolet lasers composed of a synthetic quartz lens that provides high transmittance in the ultraviolet region.
·It has excellent light resistance because it does not use glass or adhesive that absorbs ultraviolet light.
·Spherical aberration and packing washer are corrected by combining 2 or 3 spherical lenses.
·It can also be used as a condenser lens for Kr* F excimer laser (248 nm), YAG laser 4th harmonic (266 nm), and 3rd harmonic (355 nm).
·With a lens with NA of 0.1 or less, the laser collimated light can be narrowed down to the spot diameter of the diffraction limit.
· (NA 0.25 or less in ETL)
·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 the light is injected from the opposite side, the focused spot may become large and the image may appear blurred, as the spherical aberration becomes large.
· * Aberration and transmittance will deteriorate if used in a wavelength range other than the specified wavelength range.
· * 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 of the condenser lens.
· * This condenser lens is not an achromatic lens.
· * Chromatic aberration is not corrected.
· * The surface reflection (4%) of the lens causes a transmission loss of approx. 20%.