The biconvex cylindrical lens is a specialized lens that combines the characteristics of both a biconvex lens and a cylindrical lens. This type of lens exhibits biconvex properties in both principal axial directions, meaning it has a longer focal length in the central region and a shorter focal length at the edges. It is primarily used for converging light from a point source or for transmitting images to other optical systems.
Biconvex Properties: Both the incident and exit surfaces of the lens are convex. The focal length is longer in the central region and shorter at the edges.
Cylindrical Properties: The cross-section of the lens is circular or elliptical, featuring one or more cylindrical surfaces. This design allows the lens to focus light in one direction while keeping it parallel or slightly divergent in the other direction.
Optical Characteristics: Light passing through the axial meridian does not experience a change in convergence, whereas light passing through the refractive meridian does experience a change in convergence. This unique property makes biconvex cylindrical lenses valuable for applications such as altering the aspect ratio of images and focusing light into a line.
Biconvex cylindrical lenses combine the properties of biconvex and cylindrical lenses, making them uniquely suited for applications that require changing the aspect ratio of images or focusing light into a line. Their design ensures that light is focused in one direction while remaining parallel or slightly divergent in the other.
Specifications of Double Convex Cylindrical Lens
Specifications | Commercial spec. | High precision spec. |
Material | UV glass （quartz, fused silica） | |
VIS glass （Schott, CDGM, HOYA，etc.) | ||
Dimension | 5mm~350mm | |
Dimension tolerance | ±0.1mm | ±0.05mm |
Focal length tolerance | ±2% | ±1% |
Surface quality | 60/40 | 40/20 |
Centration | < 3 arc min | <1arc min |
Surface figure | 3λ | 2λ |
Surface irregularity | 1/4λ | 1/10λ |
Clear aperture | >85% of dim | >90% of dim |
Bevel | <0.2mm x 45deg | <0.1mm x 45deg |
Coating | Up on clients’ request | |
Applications for Double Convex Cylindrical lens
Image Processing: Used to alter the aspect ratio of images or to correct astigmatism in imaging systems.
Optical Transmission: Converges light from a point source or transmits images to other optical systems.
Laser Technology: Widely used in high-power laser systems and synchrotron beamlines for applications such as linear detector illumination, barcode scanning, and holographic illumination.
In conclusion, optical biconvex cylindrical lenses combine the characteristics of biconvex and cylindrical lenses, offering unique optical effects and a wide range of applications.
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