AGL-25-20P Condenser Lens

[Features]
· The aspherical condenser lens for illumination can irradiate light for illumination with a large divergence angle (converging angle).
· Used in illumination systems for high-power microscopes, and in optical systems which efficiently collect light from divergent light sources.
· By making one side non-spherical, a large angle of divergence (angle of convergence) of the order of NA0.5 has been achieved using a single lens.
· From items with small, compact apertures to large aperture lenses with a long back focus, every kind of outer diameter size has been made available.
· It can be used in a wide range from the visible region to the 2 μm infrared region.
· B270® is a registered trademark of SCHOTT AG.
· * Having parallel light incident from the back (flat) side causes the spherical aberration to increase, so that light cannot be condensed into a single point.
· * Aspheric condenser lenses are single lens types, resulting in focal lengths changing with wavelength.
· * The aspheric condenser lens is for illumination light sources.
· * This is not an aplanatic lens for laser condensing.
· * The lens does not have an antireflection coating and thus has loss due to reflections at the front and rear surfaces, providing a transmittance of 90% or less.
· * As this is a pressed product, it may have dents or chippings caused by shrinking outside the effective range.
[Product Specifications]
· [ Common Specifications]
· Material: B270® (n d=1.523)
· Shape: Front face is aspherical, rear face is planar or spherical
· Coating: Non-Coated
· Maximum operating temperature: 170°C
· Scratch-Dig: 80-50
· Effective Diameter: 80% of External Diameter
· [Individual Specifications]
· Outer diameter φD: φ25 mm
· Focal distance f*2: 20 mm
· Back focus fb*2: 15.1 mm
· NA *1 (D/2 X 0.8/f) : 0.5
· Rim thickness te: 1.2 mm
· Central thickness tc*2: 7.5 mm
· Reverse Face: Plane surface
· * 1 NA is calculated with 80% of the outer diameter of the lens.
· *2 These are pressed products, so individual units may vary. Be sure to allow sufficient margin for use.