| Shape: | Spherical |
|---|---|
| Structure: | Double Concave |
| Usage: | Optical |
| Material: | N-BK7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire, etc. |
| Model Number: | Spheric Lenses |
| Brand Name: | crysmit |
| Place of Origin: | China (Mainland) |
Quick Details
Specifications
Plano-convex lens has a positive focal length, which makes it ideal for collecting and focusing light for many imaging applications.
Plano-concave lens has a negative focal length and is used for image reduction or to spread light.
Double-convex lens has a positive focal length and is useful for 1:1 imaging and in multielement systems. also known as biconvex or equiconvex.
Double-concave lens has a negative focal length and is useful for 1:1 imaging and in multielement systems. also known as biconcave or equiconcave.
Meniscus lens has a positive or negative focal length, it forms a real or virtual image of objects.
| Plano Convex Lens | Plano Concave Lens | Double Convex Lens |
| Double Concave Lens | Positive Meniscus Lens | Negative Meniscus Lens |
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Attribute
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Specification
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Material
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N-BK7, H-K9L, Fused Silica, N-SF10, Silicon, CaF2, Sapphire, etc.
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Typical Diameter (Фmm)
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10.0, 12.7, 15.0, 20.0, 25.4, 30.0, 50.8, etc.
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Diameter Tolerance (mm)
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+0.0/-0.2 (General), +0.0/-0.02 (High Precision)
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Paraxial Focal Length Tolerance (mm)
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±2%
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Centration
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<3 arc min
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Clear Aperture
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>80% (Small Size), >95% (Large Size)
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Surface Figure (per 25mm@632.8nm)
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<1.5λ, (General), <λ/4 (High Precision)
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IRR ( @632.8nm)
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<λ/4 (General), <λ/10 (High Precision)
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Surface Quality
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60/40 (General), 10/5 (High Precision)
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Bevel (face width x 450)
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<0.25mm
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Coating
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uncoated, AR, HR, PR Coating, etc.
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Note for Spheric Lens:
(1). Other optical glass materials from Schott or Chinese CDGM are also available upon request.
(2). Custom-made Spheric Lenses at any size from diameter 2.0mm to 300mm are available upon request.
(3). Typical paraxial focal length tolerance is ±2%, better tolerance is available upon request
(4). Typical centration is 3 arc minutes, better precision is available upon request.
(5). Besides uncoated, Lenses with Anti-Reflective(AR), High-Reflective(HR), Partial-Reflective(PR) coating are available upon request.