Plano-Concave Lens
Plano-concave lenses have one flat and one concave surface, commonly used for beam expansion, projection, and increasing system focal length. Used alone or with other lenses, they support laser collimation, beam expansion, and imaging. Material comparison, ordered as UV performance | visible | infrared | refractive index | dispersion control | processing difficulty | cost | stability: calcium fluoride (CaF₂), excellent | excellent | good | 1.43 | best | moderate | high | extremely high; zinc selenide (ZnSe), poor | good | excellent | 2.4 | low | moderate | high | moderate; quartz (JGS1), good | excellent | average | 1.46 | moderate | high | medium-to-high | extremely high; optical glass (k9), poor | excellent | poor | 1.52 | moderate | low | low | moderate.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Product Specifications - Material | H-K9L Optical Glass, UV Fused Silica, Calcium Fluoride (CaF2), Zinc Selenide (ZnSe), etc. |
| Product Specifications - Diameter Range | Φ4mm-Φ200mm (Customization Supported) |
| Product Specifications - Focal Length Range | -10mm to -1000mm |
| Product Specifications - Coating Options | Uncoated, Antireflection Coating (AR), Reflective Coating, Beamsplitter Coating, etc. |
| Material [Standard plano-concave lens] | Finely annealed H-K9L optical glass |
| Focal length error (EFL) [Standard plano-concave lens] | ±2% |
| Design Wavelength [Standard plano-concave lens] | 587.6nm |
| Lens centering error [Standard plano-concave lens] | 3arcmin |
| Diameter Error [Standard plano-concave lens] | +0.0/-0.1mm |
| Surface Finish [Standard plano-concave lens] | 60/40 |
| Center-thickness error [Standard plano-concave lens] | ±0.2mm |
| Edge Bevel [Standard plano-concave lens] | 0.2mmX45° |
| Surface-figure irregularity [Standard plano-concave lens] | Wavelength/4@632.8nm |
| Material [UV Fused Silica Plano-Concave Lens] | UV Fused Silica |
| Design Wavelength [UV Fused Silica Plano-Concave Lens] | 587.6nm，n=1.45848 |
| Diameter Error [UV Fused Silica Plano-Concave Lens] | +0.0/-0.1mm |
| Center-thickness error [UV Fused Silica Plano-Concave Lens] | ±0.2mm |
| Focal length error (EFL) [UV Fused Silica Plano-Concave Lens] | ±2% |
| Surface-figure irregularity [UV Fused Silica Plano-Concave Lens] | Wavelength/4@632.8nm |
| Lens centering error [UV Fused Silica Plano-Concave Lens] | 3arcmin |
| Surface Finish [UV Fused Silica Plano-Concave Lens] | 40/20 |
| Edge Bevel [UV Fused Silica Plano-Concave Lens] | 0.2mmX45° |
| Material [Calcium Fluoride Plano-Concave Lens] | Calcium fluoride (CaF₂) single crystal |
| Design Wavelength [Calcium Fluoride Plano-Concave Lens] | 587.6nm |
| Diameter Error [Calcium Fluoride Plano-Concave Lens] | +0.0/-0.1mm |
| Center-thickness error [Calcium Fluoride Plano-Concave Lens] | ±0.1mm |
| Focal length error (EFL) [Calcium Fluoride Plano-Concave Lens] | ±1% |
| Lens centering error [Calcium Fluoride Plano-Concave Lens] | <3 arcmin |
| Surface Finish [Calcium Fluoride Plano-Concave Lens] | 60/40 |
| Edge Bevel [Calcium Fluoride Plano-Concave Lens] | 0.2mmX45° |
| Material [Zinc Selenide Plano-Concave Lens] | CVD laser-grade zinc selenide (ZnSe) |
| Design Wavelength [Zinc Selenide Plano-Concave Lens] | 10.6μm |
| Diameter Error [Zinc Selenide Plano-Concave Lens] | +0.0/-0.1mm |
| Center-thickness error [Zinc Selenide Plano-Concave Lens] | ±0.2mm |
| Focal length error (EFL) [Zinc Selenide Plano-Concave Lens] | ±1% |
| Lens centering error [Zinc Selenide Plano-Concave Lens] | <3arcmin |
| Surface Finish [Zinc Selenide Plano-Concave Lens] | 60/40 |
| Edge Bevel [Zinc Selenide Plano-Concave Lens] | 0.2mmX45° |
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Datasheet
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