Round Concave Glass Lens , optical glass CaF2 double concave lens
Double-Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double-Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths.Double-Concave Lenses are available in a wide range of sizes or focal lengths.
Changchun Ruiqi offers largest inventory of off-the-shelf optical components, including a variety of standard or UV Fused Silica Double-Concave Lenses. Standard lenses are available in several materials such as BK7/K9,UV fused Silica,CaF2,MgF2,Sapphire etc,upon customer request.
Technical Specifications:
| Material | BK7,Fused Silica,Sapphire,CaF2,BaF2,MgF2,Znse,Ge as customer request |
| Dimension | custom made |
| Dimension Tolerance | +/-0.15mm, +/-0.2mm, +0/-0.1mm as request |
| Centration | <3' |
| Surface Quality | 60/40 |
| Flatness | lambda/4 per 25nm at 632.8nm |
| Focal length | +/-3% |
| Edge | Fine ground and beveled |
| Coating | Anti-Reflective (AR) Coatings,Single layer MgF2 coating,Multilayer Broadband AR Coating |
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