功能

• Achromatic condensing lens with reduced focal length deviation in the ultraviolet range (200~400 nm).
• It can be used to collect multi-wavelength lasers in the ultraviolet region and observe ultraviolet emission images.
• When the NA is 0.1 or less, the laser collimated light can be narrowed down to the spot diameter of the diffraction limit.
• No glass or adhesive absorbs ultraviolet light, so it has excellent light resistance.
• * Use the condenser lens when you want to focus an object at infinity, or when you want to use the point light source as parallel light.
• Sufficient optical performance cannot be obtained when the camera is used for close-range imaging.
• * The condenser lens has an orientation that allows light to enter.
• * Be sure to allow parallel light to enter from the upper side (look at the engraving on the side of the lens barrel upright).
• * Doing so can cause chromatic aberration and spherical aberration to become large, which can increase the size of the focus spot, and can cause blurred images.
• Chromatic aberration and transmittance are reduced when the camera is used outside the specified wavelength range.
• * When using with a high power laser or near a high heat source, the focusing lens may become hot and the focal length of the focusing lens may change.
• * Heat dissipation measures are necessary when irradiating for a long time.
• * If you want to reduce the condensing spot diameter, widen the incident beam diameter (1/e^2) to about half the effective diameter of the condensing lens.
• Surface reflection (3~4%) of the lens causes a transmission loss of about 13%.