Product Case Studies

Flat concave lens:

Flat concave lenses are suitable for situations where one conjugate distance is more than five times the other conjugate distance. They introduce negative spherical aberration and can be used to balance the spherical aberration introduced by a single lens with positive focal length.

Main characteristics

• Negative focal length：A plano concave lens has a negative focal length, which means it can cause the incident parallel rays to diverge.
• Diverging light：When light passes through a flat concave lens, it diverges outward as if it were emitted from a virtual focal point behind the lens.
• virtual focus：Similar to a biconcave lens, a plano concave lens produces a focal point located on one side of the lens, which is a virtual focal point because the light rays do not actually intersect there.

application area

The divergent light characteristics of flat concave lenses make them widely used in multiple fields:

• Optical correction：In optical systems, plano concave lenses can be used to correct the shape of light beams or eliminate aberrations, improving imaging quality.
• Laser beam expansion：In laser systems, plano concave lenses are used to expand the size of the laser beam to meet specific application requirements.
• Orthoptics：In the field of glasses, flat concave lenses are used to correct farsightedness and help the eyes better focus on nearby objects.
• scientific research：In experimental physics and optical research, plano concave lenses are commonly used to manipulate and control the propagation of light beams.

advantage

• Simplify the design of optical systems：Flat concave lenses can be combined with other lenses to achieve complex optical effects while simplifying system design.
• Adjust the beam size：By diverging the beam, a plano concave lens can adjust the size of the beam, making it suitable for applications that require a specific beam diameter.
• Cost effectiveness：Compared to more complex optical components, plano concave lenses are typically simpler, lower in cost, and easier to mass produce.

note

When using a flat concave lens, the following factors should be considered:

• Material selection：Select appropriate lens materials based on the spectral range and environmental conditions of the application to ensure good transparency and durability.
• Lens quality：The manufacturing quality of lenses, including surface accuracy and cleanliness, directly affects optical performance.
• Combination use：In complex optical systems, plano concave lenses are often used in combination with other types of lenses to achieve the desired optical effect.

conclusion

Flat concave lens is a powerful optical component that can achieve beam divergence and control, playing a crucial role in various optical applications.