SLSQ-30-80N Spherical Planoconcave Lens

[Features]
· The simple shape expands the collimated laser light.
· It can be used in cases where the irradiation area of the illuminating light is expanded by enlarging the beam diameter in combination with a convex lens.
· A synthetic quartz lens with high laser yield strength that can also be used for ultraviolet radiation of 350 nm or less.
· Selection can be made from a wide range of variations subdivided by outer diameter, focal distance, and so on, to suit the specifications.
· * A concave lens itself cannot concentrate light or form an actual image.
· * Use in combination with a convex lens.
· * Spherical surface planoconcave lenses have chromatic aberration, resulting in focal lengths changing with wavelength.
· * The planoconcave lens has an orientation for light incidence.
· * Have parallel light incident from the concave surface.
· * When reversed, spherical aberration may increase and optical performance of the optical system may worsen.
· * If a high-energy pulse laser is used, a focal point may be created on the optical path due to reflected light from the concave surface and sparking may occur. Have the laser light incident from the flat side only when using a pulse laser.
[Product Specifications]
· [ Common Specifications]
· Material: Synthetic Quartz
· Design Wavelength: 546.1 nm
· Refractive Index: n e = 1.460
· Coating: Non-Coated
· Effective Diameter: 90% of External Diameter
· Scratch-Dig: 20-10
· [Individual Specifications]
· Outer diameter φD: φ30 mm
· Focal distance f: -80 mm
· Rim thickness te: 5.2 mm
· Central thickness tc: 2 mm
· Back focus fb: -81.4 mm
· Radius of the curvature r: 36.8 mm
· Eccentricity: < 1'