Germanium Plano-Concave Lens (PCV6-208)
Germanium plano-concave lenses have one flat surface and one concave surface and are used to diverge an incident light beam. As an infrared optical element, germanium exhibits good transmittance over a broadband infrared range, and its high refractive index makes it suitable for optical systems requiring adjustment of beam divergence. Due to its relatively low hardness, these lenses require surface protection during use; due to poor moisture resistance, they should be stored and handled in a dry environment. They are commonly used in infrared laser systems, spectral analysis equipment, and infrared imaging equipment for beam expansion or adjusting optical paths.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | Germanium |
| Diameter Tolerance | +0.0/-0.15 mm |
| Focal Length Tolerance | ±2 % |
| Centration | <3 ′ |
| Clear Aperture | >85 % |
| Surface Figure [@633nm] | <λ/4@633 nm |
| Surface Quality | 60/40 |
| Chamfer [45°] | <0.25 mmx45 ° |
| Coating | Coating available upon request |
| Diameter | 25.4 mm |
| Focal Length f | -500.0 mm |
| Radius of Curvature R1 | 213.13 mm |
| Tc | 2.0 mm |
| Te | 2.4 mm |
| fb | -501.4 mm |
Datasheet
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Supplier Information
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