Certifications

DL-25-40PNIR

Near Infrared Achromatic Lens 25mm Diameter 40.1mm Focal Length

Product Code Description Lead Time Price Quantity Buy / Get Quote
DL-25-40PNIR Near Infrared Achromatic Lens 25mm Diameter 40.1mm Focal Length Please Call £105.00
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Specifications

Back Focal Length Fb:

32.8mm

Diameter:

25mm

Eccentricity:

3'

Focal Length F:

40.1mm

Thickness of the Center Tc:

13.2mm

Thickness of the Edge TE:

9.3mm

Weight:

0.002kg

By bonding two lenses with wavelength dispersion of different refractive index the resulting component will provide reduced spherical aberration and chromatic aberration than that of a single spherical lens.
These achromatic lenses can be used as a focusing lens for YAG laser (1064nm) or LD of the near-infrared.

• The lens design is optimized so that the focal length change is minimized in the near infrared region. The focal length matches at 700nm, 880nm, 1100nm wavelengths and is optimized to minimize aberrations.
• It is suitable as a collimating lens not only because chromatic aberration but also spherical aberration is collected.
• It is not only aberration of the axial object point but is also corrected for astigmatism and comatic aberration of the axis.

• For product other diameter size or focal lengths which are not listed on our website or in our catalog, please contact our Sales Team with your requests.
• The design and manufacture of achromatic lens of other wavelength bands are available upon requested.
• Air gap type condenser lens for the laser processing (NYTL / NYDL) are also available. (WEB Reference Catalog Code/W3079)

• Please use achromatic lens when focusing an image at infinity or when making parallel light from the one point of light source. It does not provide sufficient optical performance when used in such as short-range distance imaging.
• There is a direction to the incident light parallel to the achromatic lens. A surface with a small radius of curvature is allowed to be incident parallel light from a rear surface (the surface the arrow is pointing to). When it is incident parallel light from the opposite side, spherical aberration and chromatic aberration will occur and the focused spot size will increase.
• When used in the visible region, spherical aberration and chromatic aberration increases. In addition, the transmittance decreases.