Double Concave lens, also as bi-concave lens. It is the similar function with the plano concave lens. The used wavelength range as 190-2100nm. Material can be N-BK7,Fused Silica,CaF2,SF11,H-BaK4,H-BaK7,etc, other special requested can be customerized. Coating still available.
Specification | Commercial | High Precision |
Material | As Required Schott,CDGM.etc. | As required Schott, CDGM,etc. |
Diameter Tolerance | +0.00/-0.20mm | +0.00/-0.05mm |
Focual Length Tolerance | Typical +/-5%@633nm | Typical +/-2% @633nm |
Centration | Typical <3arcmin | Typical <3arcmin |
Surface Flatness@632.8nm | L/4 | L/8 |
Surface Quality | 80-50 | 40-20 |
Bevel | 0.2-0.5 | 0.05-0.2 |
Coating | As required, with paint, Protection coating, high precision |
![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/564af97f1e580ba8ed82c13071a41b26.webp)
PHYO OPTICS Production Material Choosing
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![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/156468159d7971a3c5d549bf453435ec.webp)
Surface finishing high precision Polishing and Coating
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![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/6e98d314ba7f258701ab180bdd587bf0.webp)
Thin film Coating and design
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![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/7ef0a6935f9985bae3ee13c654622ca4.webp)
Assembly
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![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/3268924217cebb287e4d44426a57d32b.webp)
Packing for Delivery
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![K9 Optical Glass Biconcave Lens](https://img2.grofrom.com/gofarzee/3813f7559b2efeae18b5a39d7eb9758f.webp)