Biconcave Lens
Double concave lens is concave on both sides, thin in the middle and thick in the edge, used to increase the divergence of converging rays. The focal length is negative, causing parallel incident rays to diverge outward. The curvatures of the two sides are equal to each other and are used for beam extension and projection. It is used in optical components, laser systems, thermal imaging in infrared optics and sensitive components in high-energy detectors. ATOPTIK’s double concave lens is a symmetrical optical element with concave surfaces on both sides, primarily used for beam divergence, optical beam expansion, laser collimation, and optical imaging. With excellent beam divergence capability and aberration control, double concave lenses are widely applied in laser beam adjustment, optical communication, optical instruments, and sensors.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material [Normal] | Optical glass |
| Material [High Precision] | Optical glass |
| Material [Mfg. Limit] | Optical glass |
| Diameter Tolerance [Normal] | +0/-0.1mm |
| Diameter Tolerance [High Precision] | +0/-0.05mm |
| Diameter Tolerance [Mfg. Limit] | +0/-0.01mm |
| Thickness Tolerance [Normal] | +/-0.1mm |
| Thickness Tolerance [High Precision] | +/-0.05mm |
| Thickness Tolerance [Mfg. Limit] | +/-0.01mm |
| Focal Length Tolerance [Normal] | +/-2% |
| Focal Length Tolerance [High Precision] | +/-1% |
| Focal Length Tolerance [Mfg. Limit] | +/-0.5% |
| Centeration [Normal] | 3 arc min |
| Centeration [High Precision] | 1 arc min |
| Centeration [Mfg. Limit] | 10 arc sec |
| Surface Quality [Normal] | 60-40 |
| Surface Quality [High Precision] | 40-20 |
| Surface Quality [Mfg. Limit] | 10-5 |
| Surface Figure [High Precision] | 2 lambda |
| Surface Figure [Mfg. Limit] | 1 lambda |
| Surface Irregularity [Normal] | 1/4 lambda |
| Surface Irregularity [High Precision] | 1/10 lambda |
| Clear Aperture [Normal] | >80% |
| Clear Aperture [High Precision] | >90% |
| Clear Aperture [Mfg. Limit] | 100% |
| Bevel [Normal] | +/-0.2*45 degree |
| Bevel [High Precision] | +/-0.1*45 degree |
| Bevel [Mfg. Limit] | +/-0.05*45degree |
Key Features
Datasheet
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Supplier Information
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