TCAN-30C07-40 Concave Mirror

[Features]
· A concave substrate that allows evaporated film coating of various total-reflection mirrors.
· A concave mirror coated in advance with aluminum is also available.
· It can be used as the main mirror in reflecting telescopes, the reflecting mirror in the collimating optical systems of lamp light sources, etc.
· Selection can be made from a wide range of variations subdivided by external dimensions, radius of curvature, and so on, to suit the specifications.
· Machined with high surface accuracy compared with a plano-concave lens (SLB-N).
· Laser concave mirror substrates (LCBS) with high surface accuracy for use with laser resonator mirrors are also available.
· * The back side is a sanded surface and thus cannot be used for transmission.
· * Use a concave lens (SLB-N) when using for transmittance.
· * For use as a cold mirror or partial reflection mirror, the use of a concave substrate with mirrored back is required.
· * With the incidence of a high-energy pulse laser beam, sparking will be generated near the focal point and the wavefront will be disturbed.
· * The outer ridgeline of the concave surface is chamfered and edge thickness (te) may vary. Therefore, be sure to use the back side as the reference plane.
[Product Specifications]
· [ Common Specifications]
· Material: BK7
· Spherical Surface Accuracy: λ/2
· Error in Radius of Curvature: ±2%
· Coating: Mirror without Protective Film, Al
· Effective Range: 85% of External Diameter
· Scratch-Dig: 40-20
· Rear Surface: Sanded Surface
· [Individual Specifications]
· Coating: Al Only
· Outer diameter φD: φ30 mm
· Rim thickness te: 7 mm
· Central thickness tc: 4.1 mm
· Radius of the curvature r: 40 mm
· Focal distance f: 20 mm