Ball Lenses
A full sphere of optical glass used to couple, collimate or focus light over a very short back focal length, most commonly in fiber-optic and sensing assemblies.
Share requirements, quantities and a drawing if available. Specifications and supply terms require confirmation.
Overview
A ball lens is a full sphere ground and polished to precise diameter and sphericity, used where a very short back focal length or wide acceptance angle is needed — a shape simple lenses and prisms cannot achieve. This geometry solves a specific coupling problem in fiber-optic transceivers, laser-diode collimation and compact sensing modules, distinct from the general-purpose focusing role of plano or double-convex lenses. Procurement review should center on coupling light into or out of a small fiber or detector aperture with a full spherical element.
Key Selection Points
- Very short back focal length suits compact fiber-optic and sensor assemblies
- Wide acceptance angle for efficient light coupling into small apertures
Applications
Ball lenses are widely used in fiber-optic coupling (collimating or focusing light between a fiber and a detector or another fiber), laser-diode collimation, and compact sensing or endoscopic modules where a standard lens shape would not fit the available space. Half-ball variants extend this into applications needing a flat mounting face.
Structure & Configuration
This module describes the physical configuration and interfaces that distinguish the product from a generic optic. For Ball Lenses, the module focuses on coupling light into or out of a small fiber or detector aperture with a full spherical element.
- Use a labeled cross-section or configuration drawing with clear datums.
- Separate optical clear zones from mounting, sealing and handling surfaces.
- Include dimensional and inspection requirements with the enquiry for feasibility review.
- Product-specific review: connect ball diameter with fiber or emitter numerical aperture and document the trade-off against a half-ball lens.
Prepare a product-specific enquiry
Include the requirements you know and identify any points that need confirmation.
| RFQ input | What to provide |
|---|---|
| Input 1 | Define the buyer objective for Ball Lenses: coupling light into or out of a small fiber or detector aperture with a full spherical element. |
| Input 2 | Optical inputs: ball diameter; material and refractive index. |
| Input 3 | Geometry and interface: fiber or emitter numerical aperture; working distance and mount. |
| Input 4 | Special review note: provide fiber core/NA, emitter or detector geometry, spacing and ball retention method. |
| Input 5 | State quantity and project stage without assuming MOQ, inventory or delivery timing. |
| Input 6 | Name the drawing revision and acceptance evidence required for review. |
Frequently Asked Questions
What is a ball lens used for?
Ball lenses are most often used to couple light into or out of an optical fiber, or to collimate a laser diode, because their short focal length and wide acceptance angle fit compact assemblies that standard lenses cannot.
What is the difference between a ball lens and a half-ball lens?
A ball lens is a full sphere; a half-ball lens is cut in half and has a flat mounting face, which is useful where the lens needs to sit flush against a housing or fiber ferrule.
Can you supply a custom diameter or tolerance?
Ball Lenses requires this decision to be tied to ball diameter and material and refractive index. Share your drawing or exact specification through the RFQ form and we will confirm feasibility.
Which specification should be fixed first for Ball Lenses?
Begin with ball diameter. It determines how material and refractive index and fiber or emitter numerical aperture should be evaluated before the mechanical details are finalized.
When is Ball Lenses a better fit than a half-ball lens?
Choose between them by testing the requirement for coupling light into or out of a small fiber or detector aperture with a full spherical element. If that requirement is absent, the comparison product may provide a simpler procurement path.
Related Products & Resources
Explore Related Resources
Tell us what you are sourcing.
A product name, a specification or an application is a starting point.