Anti-Reflection Coating / Cemented Doublet Lenses
Surface reflections reduce optical throughput and create stray light that degrades images. Single-/multilayer antireflection coatings of selected thickness reduce them. The supplier's single-wavelength, multiwavelength and broadband AR optics are efficient, durable and environmentally stable. Dual-wavelength coatings give low reflection/high transmission at two wavelengths, such as 532nm/1064nm, for frequency-doubled lasers and mixed beams. Products serve laser crystals, Q-switch windows and laser-output windows. The description also explains cemented lenses: convex/concave elements of materials with different dispersion/index can have equal/opposite chromatic errors but unequal optical powers. Bonding cancels chromatic error while retaining net power. The same principle can cancel spherical aberration with residual power.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | H-K9, H-BAK7 and Other Optical Glasses |
| Operating Wavelength | According to Customer Requirements |
| Reflectance R | R>1—0.2% |
| Angle of Incidence | 0 Degrees or According to Customer Requirements |
| Surface Finish | II-V |
| Clear Aperture Dimension | >90% External Dimensions |
| Damage Threshold [CW; or Designed to Laser Requirements] | 300MW/cm2CW |
| Damage Threshold [Pulsed; or Designed to Laser Requirements] | 1J/cm2 Pulsed |
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